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A double-domain activation-associated secreted protein (dd-Co-ASP) isolated from the bovine small intestinal parasite Cooperia oncophora was previously shown to be an effective vaccine candidate to protect calves against a homologous challenge infection. The aim of this study was to investigate whether the dd-Co-ASP protein, purified from a Belgian C. oncophora isolate, would offer protection against a C. oncophora isolate from the southern hemisphere as well as other Cooperia species such as C. punctata in cattle and C. curticei in sheep. Two vaccination studies were performed, i.e. one in cattle and one in sheep, in which the protective effects of dd-Co-ASP, supplemented with Quil A as an adjuvant, were compared with an adjuvant control. Whereas our results showed a 75 % reduction in Cooperia spp. cumulative faecal egg counts, the results obtained in sheep demonstrated that dd-Co-ASP was ineffective in raising a protective immune response against a C. curticei challenge infection. Even though sequence analysis of the dd-Co-ASP gene revealed restricted sequence heterogeneity in the double domain ASP within and between bovine Cooperia species, the results of the vaccine study suggest that there is sufficient conservation at the protein level to yield cross-protection, holding promise for the development of a general Cooperia vaccine for use in cattle.
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Doenças dos Bovinos , Enteropatias Parasitárias , Infecções por Nematoides , Doenças dos Ovinos , Trichostrongyloidea , Vacinas , Animais , Bovinos , Doenças dos Bovinos/prevenção & controle , Fezes , Enteropatias Parasitárias/veterinária , Infecções por Nematoides/veterinária , Contagem de Ovos de Parasitas/veterinária , Ovinos , Doenças dos Ovinos/prevenção & controle , Vacinação/veterináriaRESUMO
Mining activities lead to important physical, chemical and biological effects on soil properties, generating severe impacts in the establishment and maintenance of vegetation. Assisted phytoremediation can be considered an environmentally friendly approach for soil remediation. In this study, two mining soils (PORT and GAM) were treated with 10%, by mass, of the following amendments: manure biochars prepared at 450 °C (BMW450) and 600 °C (BMW600), hydrochars prepared by hydrothermal carbonization (HTC) of manure at 190 °C (HWM190) and 240 °C (HMW240) and manure waste (MW). Brassica napus was used as a phytoextraction species. After 45 days of plant growth, soil samples were widely characterized, including microbial biomass carbon, enzymatic activity and metal content. In addition, plant biomass production, bioconcentration factor, translocation factor and metal uptake were determined. Experimental results showed that addition of biochars improved the As uptake by Brassica napus in both soils but just in the roots increasing bioconcentration factor between 22.1 and 39.5% for GAM soil and between 28.6 and 53.4% for PORT soil. Brassica napus cannot be considered as Zn accumulator in GAM soil samples and in the case of PORT samples, only the addition of BMW600 and HMW240 enhanced the phytoextraction process of Zn on the roots. Soil enzyme activity improved in hydrochar amended soils.
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Biodegradação Ambiental , Brassica napus/crescimento & desenvolvimento , Carvão Vegetal/química , Esterco , Poluentes do Solo/análise , Biomassa , Carbono/farmacologia , Metais/farmacologia , Mineração , Solo/químicaRESUMO
RESUMEN Introducción: El comportamiento caótico de la dinámica cardiaca normal y aguda ha sido caracterizado en el contexto de la teoría de los sistemas dinámicos y la geometría fractal. Objetivo: Desarrollar una nueva metodología diagnóstica para la evaluación de la dinámica cardiaca en pacientes de UCI, durante 16 horas. Metodología: Este es un estudio en pacientes ingresados a Cuidados Intensivos posquirúrgicos (UCI) y sujetos sanos, tomando un total de 47 registros electrocardiográficos continuos y/o Holter, normales y con patología aguda, evaluados en 16 horas. Se desarrolló una inducción con dos dinámicas normales y tres de UCI; a partir de los valores máximos y mínimos de la frecuencia cardiaca/hora y total de latidos/hora, registrados durante 16 horas se construyeron atractores para evaluar sus espacios de ocupación y dimensión fractal, con el fin de establecer diferencias e igualdades respecto a estados normales y patológicos. Se realizaron medidas de sensibilidad y especificidad con las dinámicas restantes para comparar el diagnostico matemático con el diagnóstico clínico. Resultados: Los espacios de ocupación de los atractores cardiacos diferencian dinámicas cardiacas normales de dinámicas con enfermedad crónica y aguda, detectando además dinámicas patológicas con valores superiores a los límites de normalidad, logrando valores de sensibilidad de 0,937 y especificidad del 1. Conclusión: se estableció una nueva metodología de evaluación de la dinámica cardiaca de utilidad para el seguimiento clínico en pacientes de UCI.
ABSTRACT Introduction: The chaotic behavior of normal and acute cardiac dynamics has been characterized in the context of theory of dynamical systems and fractal geometry. Objective: to establish a new diagnostic method for assessing cardiac dynamics in ICU patients, for 16 hours. Methodology: This is a study in post-surgical patients admitted to intensive care (ICU) and in healthy subjects, taking a total of 47 continuous electrocardiographic recordings and/ or Holter, normal and acute pathology, evaluated in 16 hours. Induction with two normal and three UCI dynamics was developed; from the maximum and minimum values of the heart/time and total frequency of beats/minute for 16 hours recorded attractors they were constructed to assess their areas of occupation and fractal dimension, in order to establish differences and equalities regarding normal states and pathological. Sensitivity and specificity measurements were performed with the remaining dynamic to compare mathematical diagnosis with clinical diagnosis. Results: Space occupancy heart attractors differ dynamic normal cardiac dynamics with chronic and acute illness, in addition detecting dynamic pathological with above normal limits values, achieving sensitivity values of 0.937 and specificity of 1. Conclusion: a new methodology for evaluating cardiac dynamics useful for clinical monitoring in ICU patients was established.
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Humanos , Dinâmica não Linear , Frequência Cardíaca , Unidades de Terapia Intensiva , Fractais , Matemática , Modelos TeóricosRESUMO
Recently a nonlinear Fick-Jacobs equation has been proposed for the description of transport and diffusion of particles interacting through a hard-core potential in tubes or channels of varying cross section [Suárez et al., Phys. Rev. E 91, 012135 (2015)]PLEEE81539-375510.1103/PhysRevE.91.012135. Here we focus on the analysis of the current and mobility when the channel is composed by a chain of asymmetric cavities and a force is applied in one or the opposite direction, for both interacting and noninteracting particles, and compare analytical and Monte Carlo simulation results. We consider a cavity with a shape given by exponential functions; the linear Fick-Jacobs equation for noninteracting particles can be exactly solved in this case. The results of the current difference (when a force is applied in opposite directions) are more accurate for the modified Fick-Jacobs equation for particles with hard-core interaction than for noninteracting ones.
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Antecedentes: La hipercalcemia durante el embarazo es un hallazgo raro. La exposición prolongada a los altos niveles de calcio puede llevar a calcificaciones en distintos órganos maternos y en el feto puede llevar a abortos espontáneos y mortinatos. Caso clínico: Paciente primípara, con gestación de 20+4 semanas, remitida por falla renal aguda e hipertensión arterial. Ella reportó ingesta excesiva de queso, leche y multivitamínicos. Con calcio de 9,2 mg/dL y relación BUN/Creatinina de 6,8 se diagnostica intoxicación alimentaria y nefrocalcinosis medular por alta ingesta de calcio. Al cuarto día de hospitalización presenta sangrado vaginal y debido a las condiciones de la madre se termina el embarazo. Posteriormente presenta una mejoría clínica significativa y se da de alta. Discusión: La relevancia de este caso es que la presencia de hipercalcemia en el embarazo y su no identificación, aumenta el riesgo de aborto, y de hipocalcemia neonatal, que a su vez puede causar muerte materna. En este cuadro se pueden presentar varias complicaciones, siendo una de las más frecuentes la nefrocalcinosis, identificada en este reporte. Conclusión: La ingesta de calcio excesiva en gestantes puede causar nefrocalcinosis. Es importante la educación para evitar ésta y otras complicaciones.
Background: Hypercalcemia during pregnancy is a strange finding. The long exposure to high calcium levels can take to calcifications in different maternal organs and it can lead to miscarriage and stillborn. Case presentation: A woman with 20+4 weeks' gestation, who was remitted because of an acute renal failure and hypertension. She reported excessive intake of cheese, milk and multivitaminics. With a calcium level of 9.2 mg/dL and BUN/Creatinine of 6.8, diagnosed with food poisoning and medullary nephrocalcinosis as a result of the high calcium intake. At the fourth day at the hospital she presented vaginal bleeding and due to the conditions of the mother the pregnancy was ended. Afterwards she presented a significant clinical improvement and she was discharged from the hospital. Discussion: The relevance of this case is that the presence of hypercalcemia during pregnancy and not identifying it elevates the risk of miscarriage and neonatal hypocalcemia, which can cause maternal death. In this aspect, many complications can develop, being one of the most important the nephrocalcinosis, identified in this report. Conclusion: The excessive calcium intake in pregnant women can cause nephrocalcinosis. It is important to educate them to avoid this and other complications.
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According to WHO the most effective way to reduce the incidence of annual human rabies, is through vaccination of dogs and cats, since 90% of human cases are due to bites mainly from canines infected with the virus. The level of protection of dogs vaccinated against rabies varies significantly between countries of the region. The objective of this study was to evaluate the humoral immune response against rabies, in dogs with some kind of "immune modulation" experimentally induced. Dogs were immunized with polyvalent (Group 1), monovalent (Group 2) vaccines, and immunized during surgical castration (Group 3), dogs treated with triamcinolone acetonide (steroids) during immunization (Group 4) or vaccinated simultaneously with a commercial immunostimulant (Group 5). The results indicate that in all cases, the majority of animals could exceed the minimum limit of antibodies to be protected according to the WHO (0.5UI / ml). However, significant differences (p <0.05) in the use of mono- or polyvalent vaccines, the use of corticosteroids at the time of immunization and vaccination during surgical castration was found.
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Cães/imunologia , Rhabdoviridae , Vacina AntirrábicaRESUMO
We study the transport process of interacting Brownian particles in a tube of varying cross section. To describe this process we introduce a modified Fick-Jacobs equation, considering particles that interact through a hard-core potential. We were able to solve the equation with numerical methods for the case of symmetric and asymmetric cavities. We focused in the concentration of particles along the direction of the tube. We also preformed Monte Carlo simulations to evaluate the accuracy of the results, obtaining good agreement between theory and simulations.
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A nonlinear Fokker-Planck equation is obtained in the continuous limit of a one-dimensional lattice with an energy landscape of wells and barriers. Interaction is possible among particles in the same energy well. A parameter γ, related to the barrier's heights, is introduced. Its value is determinant for the functional dependence of the mobility and diffusion coefficient on particle concentration, but has no influence on the equilibrium solution. A relation between the mean-field potential and the microscopic interaction energy is derived. The results are illustrated with classical particles with interactions that reproduce fermion and boson statistics.
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Epidemiological studies on benign lesions related to human papillomavirus (HPV) infection are scarce in Latin America. We enrolled 342 consecutive patients with lesions suspected of being genital warts (GW). All patients underwent confirmatory biopsy and GP5+/GP6+/- Reverse Line Blot HPV testing on frozen tissue. In 261 (81%) cases, the diagnosis was confirmed by histopathology and HPV was detected in 90.6% of men and 87.7% of women. HPV 6 was by far the most common type in both women (62%) and men (56%), followed by HPV 11 (â¼20%). Co-infection with these two types occurred in 7% and 12% of women and men, respectively. HPV16 ranked third in prevalence, with 16% of patients testing positive. Twenty-five percent of cases tested positive for multiple HPV genotypes. Although HPV 6 and HPV 11 were the main types detected and no differences between men and women were observed, we found HPV 11 contributed more to GW aetiology compared with previous reports, showing a variability of HPV type distribution in GW across populations. This information is valuable baseline data in Latin America for future estimations of the burden of GW in men and women and shows the potential benefit obtainable by prophylactic vaccination against HPV types 6 and 11.
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Condiloma Acuminado/diagnóstico , Doenças dos Genitais Femininos/virologia , Doenças dos Genitais Masculinos/virologia , Papillomavirus Humano 16/genética , Papillomavirus Humano 6/genética , Adolescente , Adulto , Biópsia , Colômbia/epidemiologia , Condiloma Acuminado/epidemiologia , Condiloma Acuminado/virologia , Estudos Transversais , Feminino , Doenças dos Genitais Femininos/diagnóstico , Doenças dos Genitais Femininos/epidemiologia , Doenças dos Genitais Masculinos/diagnóstico , Doenças dos Genitais Masculinos/epidemiologia , Genótipo , Testes de DNA para Papilomavírus Humano , Papillomavirus Humano 16/isolamento & purificação , Papillomavirus Humano 6/isolamento & purificação , Humanos , Immunoblotting , Masculino , Pessoa de Meia-Idade , Prevalência , Fatores de Risco , Adulto JovemRESUMO
BACKGROUND: Cuba is a unique country, and despite limited economic development, has an excellent health system. However, the prevalence of asthma symptoms in children in Havana, Cuba, is unusually high. AIM: As early life exposures are critical to the aetiology of asthma, we have studied environmental influences on the risk of wheezing in Cuban infants. DESIGN: Cross-sectional study. METHODS: A random sample of 2032 children aged 12-15 months living in Havana was selected for inclusion in the cohort. Data were collected using questionnaires administered by researchers. RESULTS: Of 2032 infants invited to participate, 1956 (96%) infants provided data. The prevalence of any wheeze was 45%, severe wheeze requiring use of emergency services was 30% and recurrent wheeze on three or more occasions was 20%. The largest adjusted risk factors for any wheeze were presence of eczema [odds ratio (OR) 2.09; 95% confidence interval (CI) 1.48-2.94], family history of asthma (OR 2.05; 95% CI 1.60-2.62), poor ventilation in the house (OR 1.99; 95% CI 1.48-2.67), attendance at nursery (OR 1.78; 95% CI 1.24-2.57), male sex (OR1.52; 95% CI 1.19-1.96) and the number of smokers in the house (P < 0.03 for trend), OR 1.64 (95% CI 1.17-2.31) for three or more smokers in the house compared to no smokers in the household. CONCLUSION: We have identified several risk factors for any wheeze in young infants living in modern day Cuba. As the prevalence of smoking in the house is high (51%), intervention studies are required to determine effective strategies to improve infant health.
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Asma/epidemiologia , Sons Respiratórios/etiologia , Fumar/efeitos adversos , Asma/etiologia , Estudos Transversais , Cuba/epidemiologia , Eczema/epidemiologia , Saúde da Família , Feminino , Humanos , Lactente , Masculino , Razão de Chances , Fatores de Risco , Escolas Maternais , Fatores Sexuais , Irmãos , Ventilação/estatística & dados numéricosRESUMO
PURPOSE: Currently, studies on serologic diagnosis of Helicobacter pylori-associated gastric cancer (GC) in Latin America are scarce. The aim of the present study was to evaluate the association between H. pylori serology tests in patients with early precancerous lesions or GC, when compared with non-atrophic gastritis in Colombia, Paraguay, and Mexico, three countries in Latin America with a high prevalence of H. pylori infection but contrasting rates of GC mortality. METHODS: Gastric biopsies and blood samples were obtained from patients attending the gastroenterology or oncology services of hospitals in the three participating countries. IgG antibodies against H. pylori whole-cell antigens and CagA were tested in 1,117 sera using an enzyme-linked immunoabsorbent assay. RESULTS: Positive and significant associations were shown for H. pylori seropositivity and preneoplastic lesions in Mexico (OR 2.0; 95 % CI 1.1-3.4) but not in Colombia (OR 1.2; 95 % CI 0.6-2.1) or Paraguay (OR 1.5; 95 % CI 0.6-3.2); no significant associations were shown for GC in any country. CagA seropositivity was associated with preneoplasic lesions in all three countries (ORs = 2.1, 3.0, and 3.1 for Mexico, Colombia, and Paraguay, respectively), and with GC only in Colombia (OR 4.3; 95 % CI 2.1-9.2). CONCLUSIONS: In countries of Latin America, the IgG CagA test might be a useful biomarker for patients with gastric preneoplastic lesions and for those at risk of developing gastric cancer.
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Biomarcadores Tumorais/sangue , Infecções por Helicobacter/sangue , Helicobacter pylori/isolamento & purificação , Lesões Pré-Cancerosas/sangue , Lesões Pré-Cancerosas/microbiologia , Neoplasias Gástricas/sangue , Neoplasias Gástricas/microbiologia , Ensaio de Imunoadsorção Enzimática , Feminino , Infecções por Helicobacter/epidemiologia , Infecções por Helicobacter/microbiologia , Humanos , América Latina/epidemiologia , Masculino , Pessoa de Meia-Idade , Lesões Pré-Cancerosas/epidemiologia , Lesões Pré-Cancerosas/patologia , Neoplasias Gástricas/epidemiologiaRESUMO
La Diabetes Mellitus Tipo 2 (DMT2) es una patología que se reporta en todo el mundo y genera una considerable morbilidad y mortalidad. Sus medidas epidemiológicas de frecuencia han aumentado globalmente en las últimas décadas y si no se toman medidas urgentes el problema crecerá con consecuencias relevantes. La prescripción adecuada del ejercicio aeróbico y de fuerza en el diabético es un pilar fundamental en su manejo, tratamiento, control y pronóstico y tiene múltiples beneficios, no solo en el control glicémico, sino también en parámetros cardiovasculares, metabólicos, antropométricos, psicosociales, e incluso mortalidad. Por lo mencionado, esta revisión comprende en general, el rol del ejercicio en el tratamiento de la DMT2, la prescripción especial del ejercicio, los mecanismos para la mejoría del control glicémico, los beneficios del ejercicio en el diabético y relata algunas recomendaciones basadas en la evidencia para el tratamiento de la DMT2 con el ejercicio aeróbico y el de fuerza. Los autores declaran no poseer conflictos de interés.
Type 2 Diabetes Mellitus (T2DM) is a condition that is reported worldwide and that generates a considerable morbidity and mortality. The epidemiological measures of frequency of this disease have globally increased in recent decades, and unless urgent action is taken, the problem will grow with relevant consequences. The appropriate prescription of aerobic exercise and strength training in diabetic patients is a fundamental pillar in the management, treatment, control and prognosis of this condition and it has many benefits, not only in glycemic control but also on cardiovascular, hemodynamic, metabolic, anthropometric and psychosocial parameters, and even mortality. Therefore, this review addresses in general the role of exercise in the treatment of T2DM, the specific prescription of exercise, the mechanisms for improving glycemic control, the benefits of exercise in diabetic patients, and it provides some evidence-based recommendations for the treatment of T2DM with aerobic exercise and strength training. No financial conflicts of interest exist.
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La Diabetes Mellitus Tipo 2 (DMT2) es una patología que se reporta en todo el mundo y genera una considerable morbilidad y mortalidad. Sus medidas epidemiológicas de frecuencia han aumentado globalmente en las últimas décadas y si no se toman medidas urgentes el problema crecerá con consecuencias relevantes. La prescripción adecuada del ejercicio aeróbico y de fuerza en el diabético es un pilar fundamental en su manejo, tratamiento, control y pronóstico y tiene múltiples beneficios, no solo en el control glicémico, sino también en parámetros cardiovasculares, metabólicos, antropométricos, psicosociales, e incluso mortalidad. Por lo mencionado, esta revisión comprende en general, el rol del ejercicio en el tratamiento de la DMT2, la prescripción especial del ejercicio, los mecanismos para la mejoría del control glicémico, los beneficios del ejercicio en el diabético y relata algunas recomendaciones basadas en la evidencia para el tratamiento de la DMT2 con el ejercicio aeróbico y el de fuerza. Los autores declaran no poseer conflictos de interés.(AU)
Type 2 Diabetes Mellitus (T2DM) is a condition that is reported worldwide and that generates a considerable morbidity and mortality. The epidemiological measures of frequency of this disease have globally increased in recent decades, and unless urgent action is taken, the problem will grow with relevant consequences. The appropriate prescription of aerobic exercise and strength training in diabetic patients is a fundamental pillar in the management, treatment, control and prognosis of this condition and it has many benefits, not only in glycemic control but also on cardiovascular, hemodynamic, metabolic, anthropometric and psychosocial parameters, and even mortality. Therefore, this review addresses in general the role of exercise in the treatment of T2DM, the specific prescription of exercise, the mechanisms for improving glycemic control, the benefits of exercise in diabetic patients, and it provides some evidence-based recommendations for the treatment of T2DM with aerobic exercise and strength training. No financial conflicts of interest exist.(AU)
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The gastrointestinal absorption of most drugs follows a first-order kinetics, whereby a constant fraction of the total drug is absorbed in each equal time interval. Although this related absorption principle is applicable to the most of the therapeutically used drugs, it remains unclear for poorly water-soluble compounds such as the benzimidazole anthelmintics in ruminants. The goal of the current work was to characterize the albendazole (ABZ) metabolites plasma disposition kinetics after ABZ administration at different dosages to nematode-infected lambs. Eighteen Corriedale lambs artificially infected with a resistant Haemonchus contortus strain were allocated into three groups and intraruminally treated with ABZ at either 5 (ABZ(5)), 15 (ABZ(15)) or 45 (ABZ(45)) mg/kg. Blood samples were collected up to 120 h post-treatment, and the collected plasma was analysed by high-performance liquid chromatography. The estimated pharmacokinetic parameters were statistically compared using parametric and nonparametric tests. None of the animals involved in the current trial showed any adverse events during the study. While ABZ parent drug was not recovered in the bloodstream, the area under the concentration vs time curve (AUC) of the active ABZ-sulphoxide (ABZSO) metabolite increased significantly (P<0.05) from 21.0 (ABZ(5)) up to 158.6 (ABZ(15)) and 389.7 µg·h/mL (ABZ(45)), which indicates some type of nonproportionality in the relationship between dose level and drug systemic exposure. The overall kinetic disposition of the inactive sulphone metabolite did not change after treatment at threefold the therapeutic ABZ dosage. However, significantly (P<0.05) higher AUC, C(max) and mean residence time values were observed after the administration of the highest dosage level. The higher dosages accounted for a significantly (P<0.05) enhancement of the ABZSO peak plasma concentration, which were obtained at delayed times post-treatment. High correlations between AUC(0-LOQ) and C(max) and nematode counts were observed, with Spearman's coefficients of -0.83 and -0.84, respectively. The results obtained in the current experiment show that increasing the dose of ABZ in sheep is clearly associated with enhanced plasma ABZ metabolites exposure. The data showed a nonproportionality on the gastrointestinal absorption of ABZ in nematode-infected lambs.
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Albendazol/metabolismo , Anti-Helmínticos/metabolismo , Ovinos/sangue , Albendazol/análogos & derivados , Albendazol/sangue , Albendazol/farmacocinética , Animais , Anti-Helmínticos/sangue , Anti-Helmínticos/farmacocinética , Área Sob a Curva , Trato Gastrointestinal/metabolismo , Meia-VidaRESUMO
New therapeutic strategies based on the search of alternative formulations of albendazole (ABZ) and albendazole sulphoxide (ABZSO) are under current development to optimize posology and antiparasite efficacy in dogs. In an incomplete block design, nine dogs were randomly divided into three groups (n = 6). Treatments were carried out in two phases as follows. Phase I: Group I (treatment A), animals received ABZ at 25 mg/kg of conventional formulation. Group II (treatment B), dogs received 25 mg/kg of a modified poloxamer-ABZ formulation. Group III (treatment C), animals were treated with ABZSO in equimolar amount to ABZ doses. After 21 days of wash-out period the experiment was repeated (Phase II). Blood samples were collected over 24 h and subsequently analysed by high performance liquid chromatography. ABZSO and ABZSO(2) were the analytes recovered in plasma. Significant higher (P < 0.001) ABZSO area under the concentration-time curve (+500%) and C(max) (+487%) values were obtained for the treatment C in comparison with treatments A and B. However, no statistical differences on pharmacokinetic parameters were found between formulations A and B. In conclusion, the enhanced plasma concentration profile obtained for the ABZSO formulation used in treatment C may contribute to optimize the anthelmintic control in dogs.
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Albendazol/análogos & derivados , Anti-Helmínticos/farmacocinética , Cães/metabolismo , Albendazol/administração & dosagem , Albendazol/sangue , Albendazol/farmacocinética , Animais , Anti-Helmínticos/administração & dosagem , Anti-Helmínticos/sangue , Área Sob a Curva , Cromatografia Líquida de Alta Pressão , Feminino , MasculinoRESUMO
A pharmaco-parasitological assessment of four different albendazole (ABZ) formulations was carried out in lambs infected with multiple resistant gastrointestinal (GI) nematodes. The comparative drug systemic exposure profiles (ABZ sulphoxide plasma concentrations) and anthelmintic efficacies (clinical endpoint measured through the faecal nematode eggs reduction counts) were determined for a reference formulation (RF) and three different test (T1, T2, T3) generic ABZ preparations. Fifty (50) Corriedale lambs naturally infected with multiple resistant GI nematodes were allocated into five experimental groups (n = 10). Animals in each group received treatment with either the RF, one of the test ABZ formulations (5 mg/kg by the intraruminal route) or were kept as untreated control. Blood samples were collected over 48 h post-treatment. ABZ parent drug was not recovered in the bloodstream. The ABZ sulphoxide (ABZSO) and sulphone (ABZSO(2) ) metabolites were measured in plasma by ultraviolet high-performance liquid chromatography over 36-48 h post-treatment. A faecal nematode egg count reduction test (FECRT) was performed at day 10th post-treatment to lambs from all treated and untreated groups, which indicated the predominance of nematodes with high level of resistance to ABZ. Both ABZSO C(max) and AUC(0-LOQ) values obtained for the RF (pioneer product) were significantly higher (P < 0.05) than those obtained for the T1 and T3 preparations. Based on the currently available bioequivalence criteria, the test (generic) ABZ formulations under evaluation could not be considered equivalent to the RF regarding the rate (C(max) ) and extent (AUC(0-LOD) ) of drug absorption (indirectly estimated through the ABZSO metabolite). A large variation in nematode egg counts did not permit to obtain statistically significant differences among formulations. However, a favourable trend in the efficacy against the most resistant nematodes was observed for the formulations with the highest ABZSO systemic exposure.
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Albendazol/farmacocinética , Antinematódeos/farmacocinética , Hemoncose/veterinária , Doenças dos Ovinos/tratamento farmacológico , Tricostrongilose/veterinária , Albendazol/sangue , Albendazol/uso terapêutico , Animais , Antinematódeos/sangue , Antinematódeos/uso terapêutico , Disponibilidade Biológica , Química Farmacêutica , Cromatografia Líquida de Alta Pressão , Fezes/parasitologia , Feminino , Hemoncose/sangue , Hemoncose/tratamento farmacológico , Hemoncose/parasitologia , Contagem de Ovos de Parasitas , Ovinos , Doenças dos Ovinos/sangue , Doenças dos Ovinos/parasitologia , Equivalência Terapêutica , Tricostrongilose/sangue , Tricostrongilose/tratamento farmacológico , Tricostrongilose/parasitologiaRESUMO
INTRODUCTION: The IgV(H) mutational status of B-cell chronic lymphocytic leukemia (B-CLL) is of prognostic value. Expression of ZAP-70 in B-CLL is a surrogate marker for IgV(H) unmutated (UM). As determination of IgV(H) mutational status involves a methodology currently unavailable for most clinical laboratories, it is important to have available a reliable technique for ZAP-70 estimation in B-CLL. Flow cytometry (FC) is a convenient technique for this purpose. However, there is still no adequate way for data analysis, which would prevent the assignment of false positive or negative expression. METHODS: We have modified the currently most accepted technique, which uses the ratio of the mean fluorescent index (MFI) of B-CLL to T cells. The MFI for parallel antibody isotype staining is subtracted from the ZAP-70 MFI of both B-CLL and T cells. We validated this technique comparing the results obtained for ZAP-70 expression by FC with those obtained with quantitative PCR for the same patients. RESULTS: We applied the technique in a series of 53 patients. With this modification, a better correlation between ZAP-70 expression and IgV(H) UM was obtained. CONCLUSIONS: Thus, the MFI ratio B-CLL/T cell corrected by isotype is a reliable analysis technique to estimate ZAP-70 expression in B-CLL.
Assuntos
Citometria de Fluxo , Isotipos de Imunoglobulinas , Leucemia Linfocítica Crônica de Células B/metabolismo , Proteína-Tirosina Quinase ZAP-70/metabolismo , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Humanos , Cadeias Pesadas de Imunoglobulinas/genética , Isotipos de Imunoglobulinas/metabolismo , Região Variável de Imunoglobulina/genética , Leucemia Linfocítica Crônica de Células B/diagnóstico , Leucemia Linfocítica Crônica de Células B/genética , Mutação , Proteína-Tirosina Quinase ZAP-70/genéticaRESUMO
La mayoría de niños infectados por el virus de la inmunodeficiencia humana (VIH) presentan, dentro de sus primeros signos de enfermedad, manifestaciones orales. Uno de los factores a considerar es la disminución del flujo salival producido por infiltración glandular por el propio virus o como efecto secundario a la toma de medicación antiretroviral. Objetivo: Determinar el flujo salival en niños uruguayos portadores de VIH, que asisten al Centro Nacional de Referencia VIH SIDA del Centro Hospitalario Pereira Rossell, (CHPR) en Montevideo-Uruguay. Material y métodos: Se realizó un estudio descriptivo cuantitativo analítico de casos y controles. Se incluyeron todos los pacientes portadores de VIH que asisten al Centro Nacional de Referencia (CHPR) y los pacientes del grupo control eran usuarios del mismo Hospital, con similares condiciones socio-económicas y sanos desde el punto de vista general. Se realizó el recuento de flujo salival. Los niños del grupo de estudio se dividieron a su vez en dos grupos, según su adherencia al tratamiento antirretroviral, que era calificada en buena o mala. Se estudiaron también otros parámetros como hipertrofia parotídea y actividad de caries. Resultados: Se encontró diferencia estadísticamente significativa entre los niños del grupo de estudio y grupo control en relación a flujo salival (p= 0,0002), independiente de la adherencia al tratamiento antiretroviral.
A maioria das crianças infetadas pelo vírus da imunodeficiência humana (HIV) apresentam, dentro de seus primeiros signos de doença, manifestações orais. Um dos fatores a considerar é a diminuição do fluxo salival produzido por infiltração glandular pelo próprio vírus ou como efeito secundário à tomada de medicação antiretroviral. Objetivo: Determinar o fluxo salival em crianças uruguaias portadoras de HIV, que assistem ao Centro Nacional de Referência HIV SIDA do Centro hospitalar Pereira Rossell, em Montevidéu-Uruguai. Material e métodos: Realizo-se um estudo descritivo quantitativo analítico de casos e controles. Incluíram-se todos os pacientes portadores de HIV que assistem ao Centro Nacional de referência (CHPR) e os pacientes do grupo controle eram utentes do MSP, com similares condições sócio-económicas e sãos desde o ponto de vista geral. Realizou-se o reconto de fluxo salival. As crianças do grupo de estudo dividiram-se a sua vez em dois grupos, según seu aderência ao tratamento antirretroviral, qualificada em boa ou ruim. Estudaram-se también outros parámetros como hipertrofia parotídea e actividade de caries. Resultados: Encontró-se diferença estadísticamente significativa entre as crianças do grupo de estudo e grupo controle em relaçãon a fluxo salival (p= 0,0002), independente da aderência ao tratamento antiretroviral.
One of the first signs of disease of most children infected with VIH is oral. Salivary flow can be affected by different situations, such us VIH infection and some antirretroviral medication. Objetivs: The purpose of this study was to determine salivary flow in uruguayan children infected with VIH who attend to the Centro Nacional de Referencia VIH-SIDA del Centro Hospitalario Pereira Rossell, (CHPR) in Montevideo, Uruguay. Materials and methods: A cuantitative analitic descriptive, case control study was performed. All patients attending VIH Service at the CHPR were included, and the control group were children who asked for treatment at the same Hospital, but were not infected with VIH. The salivary flow count up was done. Children of the study group were divided into two groups, according to their adherence about the antirretroviral treatment, qualified in good or bad. There was also registered other parameters such us parotid's hypertrophy and caries activity. Results: There was found a significant difference between the groups related to the salivary flow (p=0,0002), independent of adherence to antirretroviral therapy.
Assuntos
Humanos , Criança , Saliva , Manifestações Bucais , Doenças Parotídeas , HIVRESUMO
Bloodstream infection (BSI) is one of the main causes of sepsis and death in newborns. The relative importance of nosocomial and non-nosocomial agents in developing countries is not clear. We conducted a prospective study of newborns hospitalized with a first episode of BSI in order to classify it as early, late or nosocomial, describe the clinical and microbiological charateristics, and explore risk factors between hospital-acquired vs commu-nity-acquiered BSI (HA-BSI vs CA-BSI). Twenty-seven newborns with a first episode of BSI were identified. Streptococcus agalactiae and coagulase negative Staphylococcus were the main agents in CA-BSI and HA-BSI, respectively. The only significant intrinsic risk factor between HA-BSI and CA-BSI was gestational age. The frequent finding of S. agalactiae warrants routine screening and prophylaxis in pregnant women. The risk factors for HA-BSI were mostly extrinsic, and thus, susceptible of being modified.
La infección del torrente circulatorio (ITC) es una de las principales causas de sepsis y muerte neonatal. Su etiología en países en vía de desarrollo, entre agentes no nosocomiales vs nosocomiales no está suficientemente esclarecida. Estudio prospectivo que incluyó neonatos hospitalizados que presentaron un primer hemocultivo positivo, con el propósito de describir características clínicas, microbiológicas, clasificar la ITC en temprana, tardía y nosocomial, y explorar factores de riesgo entre ITC adquirida en la comunidad vs ITC adquirida en el hospital (ITC-AC vs ITC-AH). Se identificaron 27 neonatos con un primer episodio de ITC. Streptococcus agalactiae y Staphylococcus coagulasa negativa fueron los principales agentes en ITC-AC e ITC-AH, respectivamente. El factor de riesgo intrínseco que mostró una diferencia significativa entre ITC-AC vs. ITC-AH fue la edad gestacional. La presencia de S. agalactiae permite plantear el tamizaje y profilaxis a la gestante. Los factores de riesgo para ITC-AH fueron en su mayoría extrínsecos, es decir, susceptibles de ser modificados.
Assuntos
Feminino , Humanos , Recém-Nascido , Masculino , Bacteriemia/epidemiologia , Infecções Comunitárias Adquiridas/epidemiologia , Infecção Hospitalar/epidemiologia , Infecções por Bactérias Gram-Negativas/epidemiologia , Infecções por Bactérias Gram-Positivas/epidemiologia , Bacteriemia/microbiologia , Colômbia/epidemiologia , Infecções Comunitárias Adquiridas/microbiologia , Infecção Hospitalar/microbiologia , Infecções por Bactérias Gram-Negativas/microbiologia , Infecções por Bactérias Gram-Positivas/microbiologia , Neonatologia , Estudos Prospectivos , Fatores de RiscoRESUMO
Bloodstream infection (BSI) is one of the main causes of sepsis and death in newborns. The relative importance of nosocomial and non-nosocomial agents in developing countries is not clear. We conducted a prospective study of newborns hospitalized with a first episode of BSI in order to classify it as early, late or nosocomial, describe the clinical and microbiological characteristics, and explore risk factors between hospital-acquired vs community-acquired BSI (HA-BSI vs CA-BSI). Twenty-seven newborns with a first episode of BSI were identified. Streptococcus agalactiae and coagulase negative Staphylococcus were the main agents in CA-BSI and HA-BSI, respectively. The only significant intrinsic risk factor between HA-BSI and CA-BSI was gestational age. The frequent finding of S. agalactiae warrants routine screening and prophylaxis in pregnant women. The risk factors for HA-BSI were mostly extrinsic, and thus, susceptible of being modified.