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BACKGROUND: Nonspecific acute tropical febrile illnesses (NEATFI) are common in the Latin American tropics. Dengue, Chikungunya, Zika, Mayaro, and Usutu, among others, can coexist in the American tropics. This study aimed to surveil the arboviruses that cause| acute febrile syndrome in patients in the Meta department, Colombia. METHODS: Between June 2021 and February 2023, an epidemiological surveillance study was conducted in the Llanos of the Meta department in Eastern Colombia. RESULTS: One hundred patients in the acute phase with typical prodromal symptoms of NEATFI infection who attended the emergency department of the Villavicencio Departmental Hospital were included. ELISA tests were performed for Dengue, Usutu, Chikungunya, and Mayaro. RT-qPCR was performed to detect the arboviruses Usutu, Dengue, Zika, Mayaro, and Oropouche. The seroprevalence for the Chikungunya, Mayaro, and Usutu viruses was 41 % (28/68), 40 % (27/67), and 62 % (47/75), respectively. Seroconversion for Chikungunya was observed in one patient; two seroconverted to Mayaro and one to Usutu. The NS5 gene fragment of the Usutu virus was detected in nine febrile patients. RT-qPCR of the remaining arboviruses was negative. The clinical symptoms of the nine Usutu-positive patients were very similar to those of Dengue, Chikungunya, Zika, and Mayaro infections. CONCLUSIONS: The pervasive detection of unexpected viruses such as Usutu and Mayaro demonstrated the importance of searching for other viruses different from Dengue. Because Usutu infection and Mayaro fever have clinical features like Dengue, a new algorithm should be proposed to improve the accuracy of acute tropical fevers.
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Infecções por Arbovirus , Arbovírus , Monitoramento Epidemiológico , Humanos , Colômbia/epidemiologia , Masculino , Feminino , Arbovírus/isolamento & purificação , Arbovírus/genética , Infecções por Arbovirus/epidemiologia , Infecções por Arbovirus/virologia , Infecções por Arbovirus/diagnóstico , Adulto , Adolescente , Adulto Jovem , Pessoa de Meia-Idade , Estudos Soroepidemiológicos , Febre/epidemiologia , Febre/virologia , Criança , Anticorpos Antivirais/sangue , Pré-Escolar , Febre de Chikungunya/epidemiologia , Febre de Chikungunya/diagnóstico , Idoso , Ensaio de Imunoadsorção EnzimáticaRESUMO
This study aimed to evaluate the thermal performance and meat quality in broilers reared in positive pressure tunnel ventilation (PP) and negative pressure tunnel ventilation (NP) in production houses. 320 Cobb broilers (40 broilers per house) were used. Pectoralis major muscles from 40 broilers (10 broilers per house) were randomly selected and analysed for L* (lightness), a* (redness), b* (yellowness), pH, drip loss (DL), cooking loss (CL) and shear force (SF). Air temperature and humidity of the transportation and slaughterhouse waiting room were recorded in the last week of rearing. Subsequently, the enthalpy comfort index (ECI) was calculated. Air temperature and ECI were higher (p < 0.05) in positive pressure sheds, whereas relative humidity was higher (p < 0.001) in negative pressure sheds. There was no statistically significant difference between the enthalpy comfort index during transport and lairage (p > 0.005). Meat quality defects (high L*, DL, CL, SF) were found in PP and NP. It was observed that b* was higher in PP, although pH and CL were higher in NP. Differences in pH, b* and CL indicate that broilers from PP had a higher level of heat stress. In conclusion, differences in pH, b*value and cooking loss in breast broilers indicate that birds in PP had a higher level of heat stress. Additional studies investigating pre-slaughter handling methods to minimise injuries and heat stress are recommended in order to improve animal welfare and meat quality.
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The fluvial transport of dissolved inorganic carbon (DIC) is an important component of the global carbon cycle. Herein, we assessed the dynamics of DIC and the C stable isotopic composition (δ13CDIC) in a watershed with diversified land use in São Paulo State (Brazil), more specifically in the Sorocaba River basin (SRB) and considered the temporal and spatial scales. For this purpose, twelve fluvial samples at each sampling point (e.g., S1, S2, S3, S4 and S5) were collected in the SRB, from June 2009 to May 2010, which represented one complete hydrological cycle that included the extremes of the rainfall and discharge regimes. In addition, the δ13CDIC values were also characterized in the wet and dry season at all sampling points to verify their seasonal variability. The results reflected the seasonal variation in discharges, water temperatures, and electrical conductivities. Most of the DIC was transported in the wet season at all sampling points, where the less negative δ13CDIC values were characterized. The natural sources of DIC are associated with atmospheric/soil CO2 consumption. The anthropogenic impacts on both [DIC] and δ13CDIC are linked to untreated urban sewage that is discharged directly into the Sorocaba River, as well as to aquatic photosynthesis in the Itupararanga Reservoir. From 1970 to 2020, the modeling proposed in this study indicated that the annual flux of DIC (Friver) varied from 9.0 to 78.7 t km-2 a-1, confirming that the El Niño Southern Oscillation (ENSO) controlled Friver in the SRB, with higher and lower Friver values occurring during strong El Niño (EN) and La Niña (LN) years. The average Friver value was 20 t km-2 a-1, which is higher than those obtained in natural several temperate and tropical watersheds due to the influences of urban areas on [DIC] in the SRB.
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Coat color is a factor affecting heat tolerance in tropical ruminant and a particular coat color can determine which is more resilient to environmental changes. The aim of this study was to measure the level of adaptation of Morada Nova sheep with different coat color by using an Adaptability Index (AI). Adult ewes were used, including two different coat colors of Morada Nova sheep (red and white) with mean of body weight of 28.02 ± 5.70 kg and 31.47 ± 3.41 kg, respectively. Physiology parameters, hematology, electrolytes, acid-base status, mineral, renal functions, metabolites, enzymes, and proteins were measured. AI was designed using a multivariate approach (principal component analysis) to "weigh" the influence of each variable in the animal responses. The variables more important for adaptive aspects of Red Morada Nova were: haematology, electrolytes and acid-base status. The hemoglobin (HG), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), sodium (Na+), oxygen pressure (PO2), glucose (GLU) and albumin (ALB) were significantly higher in Red Morada Nova sheep and hydrogen carbonate (HCO3), base excess (BE), total carbon dioxide concentration (TCO2) and URE were significantly higher in the white phenotype. The variables more important for adaptive aspects of White Morada Nova sheep were: (K+), total protein (TP), PO2, HG, cholesterol (CHO), rectal temperature (RT) and glucose (GLU). Both phenotypes showed a high adaptation level, however, a higher value was generated for the Red Morada Nova sheep (81.97). This study concludes that both phenotypes of the Morada Nova sheep breed are well adapted to the climatic condition of the Brazilian tropical region using different adaptive mechanisms.
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Adaptação Fisiológica , Animais , Ovinos/fisiologia , Feminino , Pelo Animal , Eletrólitos/sangue , Hemoglobinas/análiseRESUMO
BACKGROUND: Allergic diseases affect about 10-30% of the population in low- or middle-income tropical countries. Few studies describe the factors associated with allergic diseases in adult patients undergoing immunotherapy in Latin American countries. OBJECTIVE: This study aimed to determine the factors associated with allergic rhinitis (AR) and AR in comorbidity with asthma (CARAS) in adults treated with immunotherapy in two allergy referral centers in Bogotá (Colombia). MATERIAL AND METHODS: Observational, cross-sectional study conducted between January 2018 and January 2019. ISAAC-III and sociodemographic questionnaires were applied to determine the factors associated with AR and CARAS in adults treated with immunotherapy who attended the allergy consult at the Fundación Santa Fe de Bogotá and Unimeq-Orl. RESULTS: Among 416 adults aged 18-68 years, 71.4% (n = 297) were women. Regarding the sensitization results obtained by skin prick test, the most frequent allergens were house dust mites (64.18%): 49.03% were positive for both Dermatophagoides pteronyssinus and Dermatophagoides farinae, while 28.61% were positive for Blomia tropicalis. Excluding house dust mites, the most frequent allergens were dog hair (31.01%), cat hair (15.1%), grasses (15.9%), and food (15.9%). The main factor associated with exclusive AR was regular acetaminophen use more than four times a year: Prevalence ratio (PR) = 1.77 (95% CI: 1.12-2.25). The main factor associated with CARAS was cesarean delivery PR: 1.44 (95% CI: 1.09-1.78). CONCLUSION: The main factor associated with AR was regular acetaminophen use, while that associated with CARAS was cesarean delivery. The ISAAC-III questionnaire can be a useful low-cost tool to assess the factors associated with allergic diseases in adults in tropical countries.
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Asma , Rinite Alérgica , Adolescente , Adulto , Idoso , Animais , Cães , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Acetaminofen , Alérgenos/efeitos adversos , Asma/epidemiologia , Asma/terapia , Estudos Transversais , Imunoterapia , Pyroglyphidae , Rinite Alérgica/epidemiologia , Testes Cutâneos/métodos , Inquéritos e QuestionáriosRESUMO
Heat stress negatively affects livestock, with undesirable effects on animals' production and reproduction. Temperature and humidity index (THI) is a climatic variable used worldwide to study the effect of heat stress on farm animals. Temperature and humidity data can be obtained in Brazil through the National Institute of Meteorology (INMET), but complete data may not be available due to temporary failures on weather stations. An alternative to obtaining meteorological data is the National Aeronautics and Space Administration Prediction of Worldwide Energy Resources (NASA POWER) satellite-based weather system. We aimed to compare THI estimates obtained from INMET weather stations and NASA POWER meteorological information sources using Pearson correlation and linear regression. After quality check, data from 489 INMET weather stations were used. The hourly, average daily and maximum daily THI were evaluated. We found greater correlations and better regression evaluation metrics when average daily THI values were considered, followed by maximum daily THI, and hourly THI. NASA POWER satellite-based weather system is a suitable tool for obtaining the average and maximum THI values using information collected from Brazil, showing high correlations with THI estimates from INMET and good regression evaluation metrics, and can assist studies that aim to analyze the impact of heat stress on livestock production in Brazil, providing additional data to complement the existing information available in the INMET database.
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Transtornos de Estresse por Calor , Meteorologia , Animais , Estados Unidos , Feminino , Umidade , Temperatura , Brasil , United States National Aeronautics and Space Administration , Tempo (Meteorologia) , Transtornos de Estresse por Calor/veterinária , Temperatura Alta , Lactação , LeiteRESUMO
Governments have established regulations to reduce energy consumption and polluting gas emissions from buildings. In Colombia, the government issued Resolution 0549 in 2015, a regulation that imposed savings percentages on different types of buildings. Builders have had to improve their designs to meet this standard. However, this task requires a detailed understanding of the energy behaviour of buildings. In the absence of follow-up data, this study performed energy characterisations of a group of 20 residential and office buildings located in a tropical climate using DesignBuilder software. The simulations show a notable influence of plug-in loads on energy consumption as well as favourable thermal comfort conditions for all categories except for the low-income category. Solar radiation through windows is the largest source of heat in buildings. Additionally, the study shows the impact of a set of energy-saving measures on energy consumption. The results of this study can help designers reduce the energy consumption of tropical buildings and/or meet energy performance standards.
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BACKGROUND: Tropics have some particularities that can impact the natural history and factors associated with allergic diseases. However, few studies described the characteristics of patients with allergic rhinitis (AR) and combined AR and asthma syndrome (CARAS) in Latin American tropical countries. OBJECTIVE: This study aimed to determine the medical, social, and environmental factors associated with AR and CARAS in children aged 5-18 years treated with immunotherapy in two allergy referral centers in Bogotá (Colombia). MATERIAL: and methods: An observational, cross-sectional study was conducted between January 2018 and January 2019. International Study Asthma Allergies Childhood-III and sociodemographic questionnaires were applied to adolescents and parents of children undergoing immunotherapy at the allergy consult in the Hospital Universitario Fundación Santa Fe de Bogotá and UNIMEQ-ORL. RESULTS: Among 830 children aged 5-18 years, 38.1% (n = 316) were women. Up to 63.25% of the population had a positive skin prick test for house dust mites: 63.25% for Dermatophagoides pteronyssinus, 61.81% for Dermatophagoides farinae, and 31.57% for Blomia tropicalis. The factors associated with AR were male sex (PR: 1.31, 95% CI: 1.08-1.57), antibiotic consumption during the first year of life (PR: 0.80; 95% CI: 0.63-0.99), and exposure to dogs (PR: 1.32; 95% CI: 1.06-2.66). The factors associated with CARAS were older age (PR=0.95; 95% CI: 0.95-0.99), acetaminophen consumption over four times a year (PR: 1.31; 95% CI: 1.03-1.55), and antibiotic consumption during the first year of life (PR: 1.21; 95% CI: 1.06-1.34). CONCLUSION: A high prevalence of B. tropicalis was found in this study. The factors associated with AR and CARAS are like those described in high-income tropical countries. Further studies are needed in low- or middle-income tropical countries to identify modifiable factors associated with allergic diseases.
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Asma , Rinite Alérgica , Rinite , Animais , Cães , Feminino , Masculino , Antígenos de Dermatophagoides , Asma/epidemiologia , Asma/terapia , Estudos Transversais , Imunoterapia , Pyroglyphidae , Rinite/epidemiologia , Rinite Alérgica/epidemiologia , Rinite Alérgica/terapia , Testes Cutâneos , Humanos , Pré-Escolar , Criança , AdolescenteRESUMO
Hop is a multifunctional specie; however, a large part of its production is destined for the beer market. In Brazil, all hop demand is imported, which has aroused interest in national production. Genetic material and cultivation systems can influence hops production. Thus, this study evaluated morphological and productive performance of hop varieties grown under organic and conventional management in the central-west region of São Paulo, Brazil. The hop yard was installed in the experimental area of the FCA/UNESP (São Paulo State University, School of Agriculture) - Botucatu, in November 2018, the data were collected in second year of production. A randomized block design was adopted, in 2 x 5 Split-Plot, being the main factor: cultivation systems (organic and conventional), and secondary factor: hop varieties (Columbus, Chinook, Nugget, Cascade, and HallertauMittelfrüeh), with four blocks and four plants per plot. Crop-specific morphological and productive parameters were evaluated. The results showed no significant influence of cultivation systems in morphological parameters. Regarding the varieties, Chinook, Cascade, and Nugget stand out for cone length. Columbus, Chinook and Cascade showed higher yields when grown in organic system, obtaining 1100.66, 1088.27 and 940.40 g of cones per plant, respectively. While, HallertauMittelfrüeh variety was the least productive in both systems, in organic system with 160.50 g per plant production, and 267.84 g per plant in conventional system, and, also showing lower cycle compared to the others.
O lúpulo é uma espécie multifuncional, entretanto, grande parte de sua produção é destinada ao mercado cervejeiro. No Brasil, toda a demanda de lúpulo é importada, o que tem despertado interesse pela produção nacional. Fatores como o material genético e sistemas de produção podem influenciar na produção do lúpulo, sendo assim, o trabalho teve como objetivo avaliar o desempenho morfológico e produtivo de variedades de lúpulo cultivadas sob manejo orgânico e convencional na região centro-oeste paulista, Brasil. O campo de lúpulo foi instalado na área experimental da FCA/UNESP - Botucatu, em novembro de 2018 e os dados coletados no segundo ano de produção. Foi adotado o delineamento de blocos casualizados, em esquema de parcelas subdivididas 2 x 5, sendo o fator principal os dois sistemas de cultivo (orgânico e convencional) e fator secundário as cinco variedades selecionadas (Columbus, Chinook, Nugget, Cascade e Hallertau Mittelfrüeh), com quatro blocos e quatro plantas por parcela. Foram avaliados os parâmetros morfológicos e produtivos específicos da cultura. Os resultados demonstraram que os sistemas de cultivo não promovem alterações significativas nos parâmetros morfológicos. Quanto às variedades, destaca-se Chinook, Cascade e Nugget para comprimento de cone. Columbus, Chinook e Cascade apresentaram maiores produções quando cultivadas em sistema orgânico, obtendo 1100,66; 1088,27 e 940,40 g de cones por planta, respectivamente. Enquanto que, a variedade Hallertau Mittelfrüeh foi a menos produtiva em ambos os sistemas, no sistema orgânico com produção de 160,50 g por planta, enquanto que no convencional 267,84 g por planta, apresentando também menor ciclo quando comparada com as demais.
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Humulus/crescimento & desenvolvimento , Agricultura OrgânicaRESUMO
This study investigated the impact of Moringa oleifera Lam. meal (MOM) on meat nutritional properties and bone quality of slow-growing layer-type male chickens raised in semi-intensive conditions. A total of 198, 72-d-old Dominant Blue D 107 male chickens, with an average weight of 1093 ± 15.2 g, were randomly assigned to three dietary treatments supplemented with 0, 3, and 6% of MOM that corresponded to T1, T2, and T3, respectively. Each treatment, consisting of six replicated floor pens of 11 birds, had access to the outdoors for 49 days. The results showed that breast muscle ash percentage was significantly greater (P ≤ 0.05) in T2 in comparison to the T1 group. Meat dry matter, protein, and fat content were not influenced by the treatments (P > 0.05). Regardless of the treatments, oleic acid (C18:1N9C) was numerically more abundant in the breast than in the leg muscle. Alternatively, femoral and tibial lengths were shorter (P ≤ 0.05) in birds fed 3% MOM than the two other groups. Moreover, birds fed with MOM had greater tibial diameter (P ≤ 0.05) than those that were fed without MOM. In addition, bone ash content and phosphorous amount were significantly higher (P ≤ 0.05) in birds fed 6% MOM compared to those fed without MOM. The data of this study indicate that up to 6% of MOM may be added to the diet of slow-growing layer-type male chickens raised with outdoor access under tropical conditions to improve bone quality traits.
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An experiment was carried out to evaluate the effects of replacing corn with by-product from biscuit manufacture (BBM) on feed intake, digestibility, nitrogen balance, ingestive behavior, and growth performance of pure or crossbred Morada Nova sheep. Twenty-four non-castrated male lambs from two genetic groups (GG) were used: purebred red-coated Morada Nova (RMN) and red-coated Morada Nova x white-coated Morada Nova. Each GG had 12 lambs with an initial body weight (BW) of 15.0±0.84 and 18.8±0.88 kg for RMN and crossbred lambs, respectively. Treatments were distributed in a completely randomized design, according to a 2 × 2 factorial arrangement, as follows: two genetic groups (RMN and crossbred) and two diets (ground corn and by-product from biscuit manufacture-BBM) with six replicates. There was no effect (p > 0.05) of GG on feed intake (g/day and as a fraction of BW). Lambs fed BBM had a lower feed intake (p < 0.05) than corn-fed lambs, except for the non-fibrous carbohydrate intake, which did not differ among diets (p > 0.05). No effects (p > 0.05) of GG or diets were observed on apparent digestibility, except for organic matter, which was higher for BBM-fed lambs (p < 0.05). Intake and N urinary excretion were lower (p < 0.05) for BBM-fed lambs when compared to corn-fed lambs. There was no effect (p > 0.05) of GG on growth performance. On the other hand, lambs fed BBM diet had a higher (p < 0.05) feed efficiency than corn-fed lambs. Total replacing corn with BBM in finishing lamb diets increases the efficiency of nutrient utilization, which results in higher feed efficiency. The crossbreeding between the red- and white-coated strains of Morada Nova sheep does not affect nutritional and growth performance.
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Ração Animal , Zea mays , Ração Animal/análise , Animais , Digestão , Ingestão de Alimentos , Masculino , Nitrogênio , Ovinos , Carneiro DomésticoRESUMO
This work aimed to evaluate the thermal comfort provided by shading structures in free-range systems under a tropical environment, based on microclimate variables of nets with different materials. During the experiment, the unshading area; the natural shading of a native tree species to the Brazilian Savanna; and the artificial 80% shadings nets: black polypropylene, heat-reflective aluminized, and association of both were evaluated. The shading structures were analyzed in paddocks at the Água Limpa Farm from the University of Brasília, where dry-bulb, wet-bulb, black globe temperatures, and wind speed were collected for the micrometeorological characterization from 8:00 am to 4:00 pm. From the temperatures, the vapor pressures and the humidities were calculated. The shortwave radiation was calculated through the sum of direct, diffuse, and reflected radiations. The mean radiant temperature, radiant heat load, and black globe temperature and humidity index were calculated. The internal and external surface temperatures of the nets and the soil temperature were measured every 30 min. The data were analyzed with aid of the statistical analysis system. The air temperature varied according to the shortwave radiation, from 25.6 °C at 8:00 am to 29.6 °C at 1:00 pm, with a decrease over the hours. Despite the air temperature of the trees showed the lowest average, the nets association structure was the most reduced all the thermal comfort indexes. The heat-reflective net presented the lowest soil temperature at all hours (under 26.1 °C). In general, the shadings proved to be efficient in promoting thermal comfort in free-range systems.
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Pradaria , Microclima , Umidade , Temperatura , ÁrvoresRESUMO
OBJECTIVE: The objective of this study was to estimate the heritability (h 2), repeatability (r), and correlations (ryiyi ) in some traits of zootechnical interest in a population of New Zealand white rabbits of a tropical dry forest area. MATERIALS AND METHODS: Three mating groups were formed, each one of 1 male and 70 females. The traits evaluated were litter size at birth (LB), born alive (BA), born dead (BD), litter weight born alive (LW), litter weight at weaning (LWW), weaning weight (WW), slaughter weight (SW), and carcass weight (CW). Weaning took place at 42 days, and the fattening phase lasted 60 ± 3 days. A descriptive statistical study was carried out on the study variables. Paternal heritability was estimated ( h f 2 ) and maternal ( h m 2 ), repeatability, rabbit index IC, and Pearson's correlations (ryiyi ) between traits. The descriptive statistics showed high variation for the BD traits. RESULTS: The values of the productivity found were similar to those presented in studies around the world. h 2 presented magnitudes between low and medium. h f 2 ranged between 0.09 and 0.42 and between 0.11 and 0.45 for h m 2 . In general, the values of h m 2 were higher than the values of h f 2 . The r values for the traits LB, BA, LW, LWW, and SW presented low magnitude, while it was medium for WW and CW. From the values of r, IC was calculated for each of the rabbits, allowing their categorization, which will be used in future selection plans. ryiyi among the variables ranged from -0.01 to 0.860. They were generally positive and mostly not significant (p > 0.05); they took a magnitude from low to moderate, except for the correlation between LB and BA. CONCLUSION: The production of rabbits under tropical conditions is similar to other reports. The genetic parameters evaluated were medium-to-low, indicating a robust non-additive gene and/or environmental effect.
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The present study evaluated the general welfare state of two strains of transgenic goats bred in a region with a hot and humid tropical climate. Nine females were used, being three transgenic for human lysozyme (hLZ group), three transgenic for human glucocerebrosidase (hGCase group), and three non-transgenic (control group). The temperature and humidity index (THI) were recorded during the morning, afternoon, and evening. The physiological parameters measured were respiratory rate, heart rate, and rectal and vaginal temperatures. Venous blood samples were collected using Vacutainer® tubes containing 10% ethylenediaminetetraacetic acid (EDTA). Also, analysis of erythrogram, leukogram, and some biochemical parameters of serum was performed. It was observed that the afternoon shift presented the largest THI, being potentially more impactful on the physiology of animals. In general, respiratory and heart rates were higher in transgenic animals, especially in the hLZ group compared to the control group (P < 0.05). Regarding the hematological parameters, the quantification of red blood cells, hemoglobin, and hematocrit was significantly lower (P < 0.05) in the hGCase group compared to that in the hLZ and control. The leukocyte count was considerably lower (P < 0.05) in the hLZ group compared to that in the hGCase and control. Correlation analysis showed that the increase in THI was associated with a change in physiological parameters normally used as indicators of thermal stress. Despite the differences found among the experimental groups, all the physiological parameters remained within the normal limits recommended for the goat species. Further studies involving a larger number of animals from different categories should be carried out to elucidate the impacts that transgenesis can have on animal welfare under different THI conditions.
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Cabras , Clima Tropical , Animais , Animais Geneticamente Modificados , Feminino , Cabras/genética , Temperatura Alta , Umidade , TemperaturaRESUMO
The progenies of international bulls in diverse climatic conditions and management levels may lead to different expressions of their genetic potential resulting in a re-ranking of these bulls. Therefore, evaluate the presence of genotype by environment interaction (G×E) within and across countries is important to guide the decision-making on alternative selection strategies. Thus, a two-step reaction norm (RN) approach was used to investigate the presence of G×E in Portuguese and Brazilian Holstein cattle. In step 1, we performed a within-country genetic evaluation using an autoregressive model to obtain precorrected phenotypes and environmental gradients (herd test-day solutions, HTD levels). In step 2, the precorrected phenotypes were considered as two distinct traits in a bi-trait RN model to estimate variance components across HTD levels, genetic correlation between HTD levels in Portugal and Brazil, and RN of the estimated breeding values. Additionally, the genetic correlation between countries using a bi-trait random regression (RR) sire model was obtained. In step 1, genetic additive variance for milk yield (MY) in Portugal was 14.1% higher than in Brazil. For somatic cell score (SCS), the genetic additive variance in Portugal was 12.7% lower than in Brazil. Although similar heritability estimates for SCS were observed in both countries, MY heritabilities were 0.31 for Portugal and 0.23 for Brazil. Genetic correlations (SD) between both countries obtained using RR sire model were 0.78 (0.051) for MY and 0.75 (0.062) for SCS. In step 2, MY genetic correlations among HTD levels within countries were higher than 0.94 for Portugal and 0.98 for Brazil. Somatic cell score genetic correlations among HTD levels ranged from 0.70 to 0.99 for Portugal and from 0.84 to 0.99 for Brazil. The average (SD) of genetic correlation estimates between Portuguese and Brazilian HTD levels were 0.74 (0.009) for MY and 0.57 (0.060) for SCS. These results suggest the presence of G×E for MY and SCS of Holstein cattle between both countries. Although there was no indication of G×E between Brazilian herd environments, the low genetic correlation for SCS indicates potential re-ranking of bulls between extreme environmental gradient in Portugal. Overall, the results of this study evidence the importance of national and international genetic evaluation systems to assist dairy farmers in the selection of the best genotypes to obtain the expected returns from investments in imported semen and to realize genetic progress in dairy populations under local environmental conditions.
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Interação Gene-Ambiente , Leite , Animais , Brasil , Bovinos/genética , Feminino , Genótipo , Lactação , Masculino , Modelos Genéticos , Fenótipo , PortugalRESUMO
Introducción: En el Perú, los accidentes ofídicos son un importante problema de salud pública, debido a una amplia distribución territorial de diferentes tipos de serpientes. Objetivo: Describir las características clínico - epidemiológicas y el manejo de los accidentes ofídicos registrados en un hospital de Perú. Métodos: Estudio de serie de casos, realizado entre enero del 2011 a diciembre 2015 en el Hospital Santa Rosa de Puerto Maldonado. Se revisaron 256 historias clínicas de pacientes con diagnóstico definitivo de ofidismo. Se analizaron variables sociodemográficas, clínicas y evolución de los pacientes. Resultados: El 78,5 por ciento de pacientes fueron varones, el grupo de edad más afectado fueron los adultos. La mayoría de los accidentes ocurrieron en el mes de marzo (12,5 por ciento). Un 39 por ciento de los pacientes se dedicaba al trabajo agrícola. Entre las 16:00 y 19:59 horas se produjeron 35,2 por ciento de los accidentes, 71,1 por ciento reportó como causante del accidente a la serpiente Bothrops atrox. El 71,5 por ciento de las mordeduras se presentaron en miembros inferiores. La mayoría de pacientes recibió tratamiento específico con antibotrópico polivalente (90,6 por ciento). Conclusiones: En la población estudiada, el sexo más afectado es el masculino con una edad entre 27 a 59 años. La serpiente más frecuente causante de los accidentes fue la Bothrops atrox, más conocida entre los pobladores como "jergón". En la mayoría de los casos se administró como tratamiento específico el suero antiofídico(AU)
Introduction: In Peru, ophidian accidents are an important public health problem due to a wide territorial distribution of different types of snakes. Objective: To describe the clinical-epidemiological characteristics and the management of ophidian accidents registered in a hospital in Peru. Methods: Case series study carried out between January 2011 to December 2015 at the Santa Rosa Hospital in Puerto Maldonado, 256 medical records of patients with a definitive diagnosis of ophidism were reviewed. Sociodemographic and clinical variables and the evolution of the patients were analyzed. Results: A total of 78.5 percent of patients were men, the age group most affected were adults. Most of the accidents occurred in March (12.5 percent). 39 percent of the patients were engaged in agricultural work. Between 4:00 p.m. and 7:59 p.m., 35.2 percent of the accidents occurred. 71.1 percent reported the Bothrops atrox snake as the cause of the accident. 71.5 percent of the bites occurred on the lower limbs. Most patients received specific treatment with polyvalent anti-botropic (90.6 percent). Conclusions: In the studied population, the most affected sex is the male with an age between 27 and 59 years. The most frequent snake causing the accidents was the Bothrops atrox, better known among the inhabitants as "jergón". In most cases, antivenom was administered as a specific treatment(AU)
Assuntos
Serpentes , Mordeduras e Picadas , Antivenenos , Bothrops , Peru , Ecossistema AmazônicoRESUMO
Tropical pastures play a significant role in the global carbon cycle and are crucial for world livestock production. Despite its importance, there is a paucity of field studies that clarify how tropical pasture species will be affected by environmental changes predicted for tropical regions. Using a temperature-free air-controlled enhancement (T-FACE) system, we increased canopy temperature (+2 °C over ambient) and evaluated the effects of warming under two soil moisture conditions in a factorial design over the physiology, forage production, and forage quality of a tropical forage legume, Stylosanthes capitata. Under well-watered conditions, warming increased the PSII efficiency, net photosynthesis, and aboveground biomass accumulation, but reduced forage quality and digestibility by decreasing crude protein content and increasing lignin content. Non-irrigated conditions under ambient temperature reduced leaf water status presumably promoting the reduction in net photosynthesis, forage production, and forage quality and digestibility. Under the combination of canopy warming and non-irrigated conditions, warming mitigated the effects of reduced soil moisture on leaf photosynthesis and biomass production, but a significant interaction reduced forage quality and digestibility more than under isolated treatments of warming or non-irrigated conditions. We found a potential physiological acclimation of the tropical forage species to moderate warming when grown under rainfed or well-watered conditions. However, this acclimation was achieved due to a trade-off that reduced forage nutritional value and digestibility that may impact future animal feeding, livestock production, and would contribute to methane emissions.
Assuntos
Fabaceae , Solo , Aclimatação , Animais , Dióxido de Carbono , Fotossíntese , Folhas de Planta , ÁguaRESUMO
Inbreeding and effective population size (Ne) are fundamental indicators for the management and conservation of genetic diversity in populations. Genomic inbreeding gives accurate estimates of inbreeding, and the Ne determines the rate of the loss of genetic variation. The objective of this work was to study the distribution of runs of homozygosity (ROHs) in order to estimate genomic inbreeding (FROH) and an effective population size using 38,789 Single Nucleotide Polymorphisms (SNPs) from the Illumina Bovine 50K BeadChip in 86 samples from populations of Charolais de Cuba (n = 40) cattle and to compare this information with French (n = 20) and British Charolais (n = 26) populations. In the Cuban, French, and British Charolais populations, the average estimated genomic inbreeding values using the FROH statistics were 5.7%, 3.4%, and 4%, respectively. The dispersion measured by variation coefficient was high at 43.9%, 37.0%, and 54.2%, respectively. The effective population size experienced a very similar decline during the last century in Charolais de Cuba (from 139 to 23 individuals), in French Charolais (from 142 to 12), and in British Charolais (from 145 to 14) for the ~20 last generations. However, the high variability found in the ROH indicators and FROH reveals an opportunity for maintaining the genetic diversity of this breed with an adequate mating strategy, which can be favored with the use of molecular markers. Moreover, the detected ROH were compared to previous results obtained on the detection of signatures of selection in the same breed. Some of the observed signatures were confirmed by the ROHs, emphasizing the process of adaptation to tropical climate experienced by the Charolais de Cuba population.
RESUMO
The background of this study was blood profile and cows' behavior that could be used as a tool to diagnose reproductive status in the dairy cows. This research was aimed to determine biochemical blood profile, progesterone level, and behaviors of Friesian Holstein crossbreed dairy cow in the tropical climates. Fifteen Friesian-Holstein crossbreeds cows, in early lactation, reared by local farmers were divided into two barn types: individual and groups of cows. Blood samples were collected from the jugular vein using a 22G needle on days 0, 14, and 28. For the determination of blood profile, blood was collected into Vacuntainer® blood tubes containing ethylenediaminetetraacetic acid (EDTA) to arrest glycolysis. The blood was transported to the laboratory with a coolbox. The concentration of progesterone in plasma was assayed byenzyme-linked immunosorbent assay (ELISA) using a commercial kit and the biochemical blood profile serum was measured by using microlab 300. The variables observed were glucose, cholesterol, urea, and non-pregnant progesterone. Data obtained was examined by T-test analysis. The result showed that the Temperature-Humidity Index were 81.3 and 79.6 respectively, there were no significant differences between two observation, in terms of total feeding time (3.06±0.48 and 2.91±0.22 hours/day), total water consumption (86.23±0.58 and 85.37±0.88 l/day), total standing (12.70±0.21 and 12.83±0.34 hours/day), total laying (11.30±0.71 and 11.16±0.62 hours/day). The blood profile and progesterone levels were lower than the normal range in dairy cows. Also, the result indicated that blood parameters were not significantly different (P > 0.05) between individual pen and group. The result indicated that the progesterone level was not significant in two models of management dairy cows. The conclusion of the research is the climate can affect behavior and the blood parameters. Blood profiles [...].(AU)
Assuntos
Animais , Feminino , Bovinos , Análise Química do Sangue/veterinária , Progesterona/análise , Comportamento Animal , Aclimatação , Fertilidade/efeitos da radiaçãoRESUMO
The background of this study was blood profile and cows' behavior that could be used as a tool to diagnose reproductive status in the dairy cows. This research was aimed to determine biochemical blood profile, progesterone level, and behaviors of Friesian Holstein crossbreed dairy cow in the tropical climates. Fifteen Friesian-Holstein crossbreeds cows, in early lactation, reared by local farmers were divided into two barn types: individual and groups of cows. Blood samples were collected from the jugular vein using a 22G needle on days 0, 14, and 28. For the determination of blood profile, blood was collected into Vacuntainer® blood tubes containing ethylenediaminetetraacetic acid (EDTA) to arrest glycolysis. The blood was transported to the laboratory with a coolbox. The concentration of progesterone in plasma was assayed byenzyme-linked immunosorbent assay (ELISA) using a commercial kit and the biochemical blood profile serum was measured by using microlab 300. The variables observed were glucose, cholesterol, urea, and non-pregnant progesterone. Data obtained was examined by T-test analysis. The result showed that the Temperature-Humidity Index were 81.3 and 79.6 respectively, there were no significant differences between two observation, in terms of total feeding time (3.06±0.48 and 2.91±0.22 hours/day), total water consumption (86.23±0.58 and 85.37±0.88 l/day), total standing (12.70±0.21 and 12.83±0.34 hours/day), total laying (11.30±0.71 and 11.16±0.62 hours/day). The blood profile and progesterone levels were lower than the normal range in dairy cows. Also, the result indicated that blood parameters were not significantly different (P > 0.05) between individual pen and group. The result indicated that the progesterone level was not significant in two models of management dairy cows. The conclusion of the research is the climate can affect behavior and the blood parameters. Blood profiles [...].