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1.
Rev Assoc Med Bras (1992) ; 69(2): 314-319, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36790237

RESUMEN

OBJECTIVE: This study aimed to verify risk factors associated with gastroschisis mortality in three neonatal intensive care units located in the state of Espírito Santo, Brazil. METHODS: A retrospective cohort study of neonates with gastroschisis was performed between 2000 and 2018. Prenatal, perinatal, and postsurgical variables of survival or nonsurvival groups were compared using chi-square statistical test, t-test, Mann-Whitney U test, and logistic regression. Tests with p<0.05 were considered statistically determined. RESULTS: A total of 142 newborns were investigated. Mean maternal age, gestational age, and birth weight were lower in the group of nonsurvival (p<0.05). Poor clinical conditions during admission, complex gastroschisis, closure with silo placement, the use of blood products, surgical complications, and short bowel syndrome were more frequent in the nonsurvival group (p<0.05). Complex gastroschisis [adjusted odds ratio (OR) 3.74, 95% confidence interval (95%CI) 1.274-11.019] and short bowel syndrome (adjusted OR 7.55, 95%CI 2.177-26.225) increased the risk of death. Higher birth weight inversely reduced the risk for mortality (adjusted OR 0.99, 95%CI 0.997-1.000). CONCLUSION: Complex gastroschisis and short bowel syndrome increased the risk of death, with greater birth weight being inversely correlated with the risk of mortality. The findings of this research can contribute to the formulation of protocols to improve the quality and safety of care in order to reduce neonatal mortality associated with gastroschisis.


Asunto(s)
Gastrosquisis , Síndrome del Intestino Corto , Embarazo , Femenino , Humanos , Recién Nacido , Gastrosquisis/complicaciones , Gastrosquisis/cirugía , Estudios Retrospectivos , Peso al Nacer , Síndrome del Intestino Corto/complicaciones , Brasil/epidemiología
2.
Rev. Assoc. Med. Bras. (1992, Impr.) ; 69(2): 314-319, Feb. 2023. tab
Artículo en Inglés | LILACS-Express | LILACS | ID: biblio-1422642

RESUMEN

SUMMARY OBJECTIVE: This study aimed to verify risk factors associated with gastroschisis mortality in three neonatal intensive care units located in the state of Espírito Santo, Brazil. METHODS: A retrospective cohort study of neonates with gastroschisis was performed between 2000 and 2018. Prenatal, perinatal, and postsurgical variables of survival or nonsurvival groups were compared using chi-square statistical test, t-test, Mann-Whitney U test, and logistic regression. Tests with p<0.05 were considered statistically determined. RESULTS: A total of 142 newborns were investigated. Mean maternal age, gestational age, and birth weight were lower in the group of nonsurvival (p<0.05). Poor clinical conditions during admission, complex gastroschisis, closure with silo placement, the use of blood products, surgical complications, and short bowel syndrome were more frequent in the nonsurvival group (p<0.05). Complex gastroschisis [adjusted odds ratio (OR) 3.74, 95% confidence interval (95%CI) 1.274-11.019] and short bowel syndrome (adjusted OR 7.55, 95%CI 2.177-26.225) increased the risk of death. Higher birth weight inversely reduced the risk for mortality (adjusted OR 0.99, 95%CI 0.997-1.000). CONCLUSION: Complex gastroschisis and short bowel syndrome increased the risk of death, with greater birth weight being inversely correlated with the risk of mortality. The findings of this research can contribute to the formulation of protocols to improve the quality and safety of care in order to reduce neonatal mortality associated with gastroschisis.

3.
Mar Pollut Bull ; 174: 113266, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-35090265

RESUMEN

In the Bay of Biscay, regional monitoring programmes and data on abundance and distribution of floating marine litter are scarce, contrary to many other European marine regions. Here, a joint analysis of multiyear observations (2017-2019) of floating micro and macrolitter and oceanographic conditions was conducted for the Bay of Biscay by combining microlitter samplings with neuston nets and vessel-based macrolitter observations. Results show spatiotemporal abundance and distribution patterns. The density of floating microlitter increased from 26,056 items/km2 in 2017 to 1,802,4611 items/km2 in 2019; floating macrolitter densities barely varied amongst year (2.52 items/km2 in 2017 and 3.70 items/km2 in 2019). No significant correlation was found between densities of micro and macrolitter, neither for the oceanographic variables. We conclude that longer micro and macrolitter monitoring periods and standardized datasets based on the cross-border cooperation are needed to collect more comparable information, evaluate trends, and support decision making in the area.


Asunto(s)
Plásticos , Residuos , Bahías , Ecosistema , Monitoreo del Ambiente , Residuos/análisis
4.
J. pediatr. (Rio J.) ; 97(6): 670-675, Nov.-Dec. 2021. tab
Artículo en Inglés | LILACS | ID: biblio-1350981

RESUMEN

Abstract Objective: To characterize the influence of birthplace on outcomes of patients with gastroschisis admitted to three hospitals in a state in Brazil's southeastern region, according to condition inborn (born in a reference center) or outborn (born outside the reference center). Methods: Retrospective multicenter cohort study of patients with gastroschisis. The sample size utilized was of patients admitted in three hospitals with a diagnosis of gastroschisis ICD 10 Q79.3 between January 2000 to December 2018. Patients were divided into two groups, inborn and outborn. Characteristics of prenatal, perinatal and postoperative were compared using statistical tests. The level of significance adopted was P-value < 0.05. Results: In total, 144 cases of gastroschisis were investigated. The outborn patients group had higher rates of absence of antenatal diagnosis (p = 0.001), vaginal delivery (p = 0.001), longer time between birth and abdominal wall closure surgery (p = 0.001), to silo removal (p = 0.001), to first enteral feeding (p = 0.008), for weaning from mechanical ventilation (p = 0.034), used less peripherally inserted central catheter (PICC) and required more venous dissections (p = 0.001), and lower mean of serum sodium (p = 0.015). There were no differences in mortality rates and length of hospital stay between the inborn and outborn groups. Conclusion: Although outborn patients with gastroschisis were less likely to have an antenatal diagnosis and were more prone to a longer time to undergo surgical and feeding procedures, and to spend more time in mechanical ventilation, these disadvantages seemed not to reflect on the death rate and the length of hospital stay of patients from this group.


Asunto(s)
Humanos , Femenino , Embarazo , Gastrosquisis/cirugía , Gastrosquisis/epidemiología , Brasil/epidemiología , Estudios Retrospectivos , Estudios de Cohortes , Resultado del Tratamiento , Tiempo de Internación
5.
J Pediatr (Rio J) ; 97(6): 670-675, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33773959

RESUMEN

OBJECTIVE: To characterize the influence of birthplace on outcomes of patients with gastroschisis admitted to three hospitals in a state in Brazil's southeastern region, according to condition inborn (born in a reference center) or outborn (born outside the reference center). METHODS: Retrospective multicenter cohort study of patients with gastroschisis. The sample size utilized was of patients admitted in three hospitals with a diagnosis of gastroschisis ICD 10 Q79.3 between January 2000 to December 2018. Patients were divided into two groups, inborn and outborn. Characteristics of prenatal, perinatal and postoperative were compared using statistical tests. The level of significance adopted was P-value < 0.05. RESULTS: In total, 144 cases of gastroschisis were investigated. The outborn patients group had higher rates of absence of antenatal diagnosis (p = 0.001), vaginal delivery (p = 0.001), longer time between birth and abdominal wall closure surgery (p = 0.001), to silo removal (p = 0.001), to first enteral feeding (p = 0.008), for weaning from mechanical ventilation (p = 0.034), used less peripherally inserted central catheter (PICC) and required more venous dissections (p = 0.001), and lower mean of serum sodium (p = 0.015). There were no differences in mortality rates and length of hospital stay between the inborn and outborn groups. CONCLUSION: Although outborn patients with gastroschisis were less likely to have an antenatal diagnosis and were more prone to a longer time to undergo surgical and feeding procedures, and to spend more time in mechanical ventilation, these disadvantages seemed not to reflect on the death rate and the length of hospital stay of patients from this group.


Asunto(s)
Gastrosquisis , Brasil/epidemiología , Estudios de Cohortes , Femenino , Gastrosquisis/epidemiología , Gastrosquisis/cirugía , Humanos , Tiempo de Internación , Embarazo , Estudios Retrospectivos , Resultado del Tratamiento
6.
Bol. méd. Hosp. Infant. Méx ; 77(6): 312-319, Nov.-Dec. 2020. tab, graf
Artículo en Español | LILACS | ID: biblio-1142481

RESUMEN

Resumen Introducción: El aumento o la reducción del arco longitudinal medial (ALM) puede afectar funciones esenciales en la biomecánica del pie, con repercusiones en la salud a largo plazo. El objetivo del presente estudio fue determinar la altura del ALM en niños de 3 a 6 años, a través de cinco métodos de análisis de huella para el diagnóstico de pie plano. Métodos: Se realizó un estudio observacional transversal con 367 niños de 3 a 6 años en un municipio del Estado de México. Se llevó a cabo una evaluación postural completa, plantoscopía por medio de la clasificación de Viladot y análisis de la huella en pedigrafía, calculando la altura del ALM mediante el ángulo de Clarke (AC), el índice de Staheli (IS), el índice de Chippaux-Smirak (ICS) y el ángulo gamma (Ag). Resultados: La prevalencia de pie plano utilizando el podoscopio fue del 57.7%. Mediante los ángulos y los índices, la prevalencia fue del 86.9% por IS, del 83.3% por ICS, del 95.9% por AC y del 22.3% por Ag. El Ag fue menos sensible para la detección de pie plano en comparación con el ICS, el IS y el AC. Conclusiones: De acuerdo con los resultados del presente estudio, se propone utilizar métodos de análisis de huella para el diagnóstico de pie plano, además de la valoración clásica con el podoscopio. Se recomienda incluir el diagnóstico y la vigilancia del pie plano en la consulta del niño sano, ya que desde edades tempranas puede detectarse la tendencia en la arquitectura podálica.


Abstract Background: The increase or reduction of the medial longitudinal arch (MLA) can affect essential functions in the foot biomechanics with long-term health consequences. The aim of the present study was to determine the height of the MLA in children from 3 to 6 years of age through five methods of footprint analysis for the diagnosis of flat foot. Methods: A cross-sectional observational study was conducted with 367 children aged 3 to 6 years in a municipality of the State of Mexico. We conducted a complete postural evaluation, plantoscopy by Viladot classification, and footprint analysis calculating the height of the ALM using the Clarke angle (CA), the Staheli index (SI), the Chippaux-Smirak index (CSM), and the gamma angle (gA). Results: The prevalence of flat feet using the podoscope was 57.7%. Through the angles and indexes, the prevalence was 86.9% for SI, 83.3% for CSI, 95.9% for CA, and 22.3% for gA. The gA was less sensitive for flat foot detection compared to CSI, SI and CA. Conclusions: Based on the present results, we propose that footprint analysis should be used for flat foot diagnosis besides the classic evaluation by podoscope. We recommend that flat foot diagnosis and surveillance should be included on in the consultation of the healthy child, as a trend for podalic architecture can be detected from early ages.


Asunto(s)
Niño , Preescolar , Humanos , Pie Plano , Pie Plano/diagnóstico , Pie Plano/epidemiología , Prevalencia , Estudios Transversales , México
7.
Bol Med Hosp Infant Mex ; 77(6): 312-319, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33186341

RESUMEN

Background: The increase or reduction of the medial longitudinal arch (MLA) can affect essential functions in the foot biomechanics with long-term health consequences. The aim of the present study was to determine the height of the MLA in children from 3 to 6 years of age through five methods of footprint analysis for the diagnosis of flat foot. Methods: A cross-sectional observational study was conducted with 367 children aged 3 to 6 years in a municipality of the State of Mexico. We conducted a complete postural evaluation, plantoscopy by Viladot classification, and footprint analysis calculating the height of the ALM using the Clarke angle (CA), the Staheli index (SI), the Chippaux-Smirak index (CSM), and the gamma angle (gA). Results: The prevalence of flat feet using the podoscope was 57.7%. Through the angles and indexes, the prevalence was 86.9% for SI, 83.3% for CSI, 95.9% for CA, and 22.3% for gA. The gA was less sensitive for flat foot detection compared to CSI, SI and CA. Conclusions: Based on the present results, we propose that footprint analysis should be used for flat foot diagnosis besides the classic evaluation by podoscope. We recommend that flat foot diagnosis and surveillance should be included on in the consultation of the healthy child, as a trend for podalic architecture can be detected from early ages.


Background: Introducción">El aumento o la reducción del arco longitudinal medial (ALM) puede afectar funciones esenciales en la biomecánica del pie, con repercusiones en la salud a largo plazo. El objetivo del presente estudio fue determinar la altura del ALM en niños de 3 a 6 años, a través de cinco métodos de análisis de huella para el diagnóstico de pie plano. Métodos: Se realizó un estudio observacional transversal con 367 niños de 3 a 6 años en un municipio del Estado de México. Se llevó a cabo una evaluación postural completa, plantoscopía por medio de la clasificación de Viladot y análisis de la huella en pedigrafía, calculando la altura del ALM mediante el ángulo de Clarke (AC), el índice de Staheli (IS), el índice de Chippaux-Smirak (ICS) y el ángulo gamma (Ag). Resultados: La prevalencia de pie plano utilizando el podoscopio fue del 57.7%. Mediante los ángulos y los índices, la prevalencia fue del 86.9% por IS, del 83.3% por ICS, del 95.9% por AC y del 22.3% por Ag. El Ag fue menos sensible para la detección de pie plano en comparación con el ICS, el IS y el AC. Conclusiones: De acuerdo con los resultados del presente estudio, se propone utilizar métodos de análisis de huella para el diagnóstico de pie plano, además de la valoración clásica con el podoscopio. Se recomienda incluir el diagnóstico y la vigilancia del pie plano en la consulta del niño sano, ya que desde edades tempranas puede detectarse la tendencia en la arquitectura podálica.


Asunto(s)
Pie Plano , Niño , Preescolar , Estudios Transversales , Pie Plano/diagnóstico , Pie Plano/epidemiología , Humanos , México , Prevalencia
8.
Rev. cient. (Guatem.) ; 28(1): [32]-[43], 20181107.
Artículo en Español | LILACS-Express | LILACS | ID: biblio-963803

RESUMEN

Neolentinus ponderosus y N. lepideus son dos especies de hongos saprobios que poseen uso alimenticio tradicional en comunidades de los departamentos de Huehuetenango y Totonicapán, Guatemala. La capacidad degradadora de ambas especies les confiere potencial para el estudio de la producción de cuerpos fructíferos a nivel de sustrato, por lo que en esta investigación se evaluó el crecimiento de una cepa nativa de N. ponderosus y una de N. lepideus en el medio de cultivo agar extracto de malta (EMA) a diferente pH y también se estudió la degradación de la madera de dos especies de pino (Pinus tecunumanii y P. ayacahuite) en cámaras de podredumbre durante 12 meses. El mayor diámetro de crecimiento miceliar de la cepa N. ponderosus se observó a pH 7.0, en tanto que para N. lepideus se obtuvo a pH 5.0 y 5.6. Las colonias de ambas cepas evidenciaron textura afelpada, borde regular a irregular, color blanco, con o sin pigmento difusible, olor frutal, hifas de 1.0-5.0 µm de diámetro, con clamidosporas y fíbulas. La madera de P. tecunumanii degradada por la cepa de N. ponderosus y la madera de P. ayacahuite por la cepa N. lepideus, presentaron porcentajes de pérdida de peso de 8.76 (±5.58) y 12.07 (±5.66), respectivamente y en ambos casos se alcanzó solamente el estadio temprano de degradación. Los resultados de este estudio sientan las bases para investigaciones posteriores en los que se evalúe el cultivo en troncos de ambas especies para la producción de cuerpos fructíferos con fines alimenticios y comerciales


Neolentinus ponderosus and N. lepideus are two saprophytic fungi species used traditionally in Huehuetenango and Totonicapán, Guatemala. The degradative capacity of both species confers them potential for fruiting bodies production. This study evaluated the mycelial growth of two native strains of N. ponderosus and N. lepideus in malt extract agar (EMA) at different pH and the degradation of wood from two pine species in rot chambers during 12 months. pH 7.0 was the most appropriate for the mycelial growth of N. ponderosus and for N. lepideus were 5.0 and 5.6. The colonies of both strains showed fruity odor, velvety texture, regular to irregular edge, white color, with or without diffusible pigment, hyphae with 1-5 µm width, chlamydospores and clamp connections. Wood from Pinus tecunumanii and P. ayacahuite exhibit weight-loss percentages between 8.76 ± 5.58 and 12.07 ± 5.66, with N. ponderosus 145.2003 and N. lepideus 90.2002, respectively. In both cases reached the early stage of brown-rot decay. These results could be useful for future research that evaluate the fruiting bodies production in logs for food and commercial purposes

9.
J Food Prot ; 80(4): 632-639, 2017 04.
Artículo en Inglés | MEDLINE | ID: mdl-28291384

RESUMEN

Salmonella enterica serovar Typhimurium (STm) and its monophasic variant 4,[5],12:i:- (VMSTm) have been responsible for an increased number of foodborne infections in humans in Europe in recent years. The aim of this study was to investigate the origin of three foodborne salmonellosis outbreaks that occurred in Pavia Province (Lombardy region, northern Italy) in 2010. Phenotypic and genetic characteristics of the STm and VMSTm isolates from patients and from food that were recovered in the framework of the three outbreaks were evaluated through serotyping, phage typing, antimicrobial susceptibility testing, pulsed-field gel electrophoresis (PFGE), and multiple-locus variable-number tandem repeat analysis (MLVA). Salami from three artisan producers, which had all purchased meat from the same slaughterhouse, was the food source of infection in outbreak I. STm isolates were recovered from salami and patients with symptoms of gastroenteritis. These isolates had the same PFGE type and the same rare MLVA profile (3-18-9-NA-211). The same molecular profiles were found in an STm isolate from a salami, which likely was the source of another family outbreak (II). A VMSTm strain with common phenotypic and molecular profiles was isolated from three hospitalized patients and identified as the cause of another putative outbreak (III). During the following 3 years (2011 through 2013), 360 salami produced in Pavia Province were monitored for the presence of S. enterica . In 2011, no STm and VMSTm isolates were recovered from 159 salami tested. During 2012 and 2013, 13.9% of 201 tested salami harbored S. enterica , and half of the isolates were VMSTm, mainly in salami from those artisan producers involved in the previous outbreaks. These isolates were genetically variable, especially in terms of MLVA profiles. The data collected suggest that from 2012, VMSTm has replaced STm in the environments of the salami producers monitored in this study, and these data confirm the dominance of this emergent serovar along the pork supply chain.


Asunto(s)
Salmonella typhimurium/aislamiento & purificación , Serogrupo , Animales , Electroforesis en Gel de Campo Pulsado , Europa (Continente) , Humanos , Italia/epidemiología , Carne Roja , Infecciones por Salmonella/epidemiología , Salmonella enterica/aislamiento & purificación , Porcinos
10.
Antimicrob Agents Chemother ; 59(1): 389-96, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25367909

RESUMEN

Klebsiella pneumoniae is at the forefront of antimicrobial resistance for Gram-negative pathogenic bacteria, as strains resistant to third-generation cephalosporins and carbapenems are widely reported. The worldwide diffusion of these strains is of great concern due to the high morbidity and mortality often associated with K. pneumoniae infections in nosocomial environments. We sequenced the genomes of 89 K. pneumoniae strains isolated in six Italian hospitals. Strains were selected based on antibiotypes, regardless of multilocus sequence type, to obtain a picture of the epidemiology of K. pneumoniae in Italy. Thirty-one strains were carbapenem-resistant K. pneumoniae carbapenemase producers, 29 were resistant to third-generation cephalosporins, and 29 were susceptible to the aforementioned antibiotics. The genomes were compared to all of the sequences available in the databases, obtaining a data set of 319 genomes spanning the known diversity of K. pneumoniae worldwide. Bioinformatic analyses of this global data set allowed us to construct a whole-species phylogeny, to detect patterns of antibiotic resistance distribution, and to date the differentiation between specific clades of interest. Finally, we detected an ∼ 1.3-Mb recombination that characterizes all of the isolates of clonal complex 258, the most widespread carbapenem-resistant group of K. pneumoniae. The evolution of this complex was modeled, dating the newly detected and the previously reported recombination events. The present study contributes to the understanding of K. pneumoniae evolution, providing novel insights into its global genomic characteristics and drawing a dated epidemiological scenario for this pathogen in Italy.


Asunto(s)
Antibacterianos/uso terapéutico , Carbapenémicos/uso terapéutico , Farmacorresistencia Bacteriana Múltiple/genética , Infecciones por Klebsiella/epidemiología , Klebsiella pneumoniae/genética , Técnicas de Tipificación Bacteriana , Secuencia de Bases , Infección Hospitalaria/microbiología , ADN Bacteriano/genética , Evolución Molecular , Humanos , Italia/epidemiología , Infecciones por Klebsiella/tratamiento farmacológico , Infecciones por Klebsiella/microbiología , Klebsiella pneumoniae/clasificación , Klebsiella pneumoniae/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Tipificación de Secuencias Multilocus , Polimorfismo de Nucleótido Simple , Análisis de Secuencia de ADN , beta-Lactamasas/genética
11.
Ecotoxicol Environ Saf ; 112: 201-11, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25463872

RESUMEN

Investigations of the redox process and chemical speciation of Hg(II) lead to a better understanding of biogeochemical processes controlling the transformation of Hg(II) into toxic and bioaccumulative monomethyl mercury, mainly in areas contaminated with Hg(0). This study investigates the speciation and redox processes of Hg in soil samples from a small area contaminated with Hg(0) as a result of gold mining activities in the rural municipality of Descoberto (Minas Gerais, Brazil). Soil samples were prepared by adding Hg(0) and HgCl2 separately to dry soil, and the Hg redox process was monitored using thermodesorption coupled to atomic absorption spectrometry. A portion of the Hg(0) added was volatilized (up to 37.4±2.0%) or oxidized (from 36±7% to 88±16%). A correlation with Mn suggests that this oxidation is favored, but many other factors must be evaluated, such as the presence of microorganisms and the types of organic matter present. The interaction of Hg with the matrix is suggested to involve Hg(II)-complexes formed with inorganic and organic sulfur ligands and/or nonspecific adsorption onto oxides of Fe, Al and/or Mn. The kinetics of the oxidation reaction was approximated for two first-order reactions; the faster reaction was attributed to the oxidation of Hg(0)/Hg(I), and the slower reaction corresponded to Hg(I)/Hg(II). The second stage was 43-139 times slower than the first. The samples spiked with Hg(II) showed low volatilization and a shifting of the signal of Hg(II) to lower temperatures. These results show that the extent, rate and type of redox process can be adverse in soils. Descoberto can serve as an example for areas contaminated with Hg(0).


Asunto(s)
Compuestos de Mercurio/metabolismo , Mercurio/metabolismo , Contaminantes del Suelo/metabolismo , Adsorción , Brasil , Monitoreo del Ambiente , Minería , Oxidación-Reducción , Espectrofotometría Atómica , Volatilización
12.
New Microbiol ; 37(4): 535-41, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25387291

RESUMEN

The aim of this study was to evaluate the antibacterial activity and cytotoxic effect of the compound SIAB-GV3, a new formulation presenting as an aqueous suspension of silicon dioxide (SiO2) functionalized with silver (Ag+) nanoparticles and benzalkonium. The product is formulated as an adjuvant for the treatment of inflammatory diseases of the oral cavity. This study demonstrates that SIAB-GV3 possesses strong antimicrobial activity against most of the common oral pathogens, in particular against Streptococcus pyogenes, Porphyromonas gingivalis and Aggregatibacter actinimycetemcomitans. The cytotoxic effect against human embryo lung fibroblasts (HELF cells) was evaluated at different times, from 1 h to 168 h, using concentrations of SIAB-GV3 ranging from 50 mg/ml to 0.0008 mg/ml. At the concentration of 10 mg/ml, commonly used in clinical practice, the compound results cyto- toxic after about 2 hours, this time being much longer than the typical time of local application, which is no more than 10 minutes. In conclusion, our findings suggest that SIAB-GV3 has a good antibacterial activity against the most common oral pathogens even at very low concentrations and a low cytotoxic activity, thanks to the synergistic effects of Ag nanoparticles, silicon dioxide and benzalkonium.


Asunto(s)
Antibacterianos/farmacología , Bacterias/efectos de los fármacos , Plata/farmacología , Antibacterianos/toxicidad , Línea Celular , Supervivencia Celular/efectos de los fármacos , Evaluación Preclínica de Medicamentos , Fibroblastos/efectos de los fármacos , Humanos , Pruebas de Sensibilidad Microbiana , Dióxido de Silicio/farmacología , Dióxido de Silicio/toxicidad , Plata/toxicidad
13.
Pathog Glob Health ; 106(7): 391-6, 2012 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23265610

RESUMEN

Midichloria mitochondrii is an intracellular bacterium found in the hard tick Ixodes ricinus. In this arthropod, M. mitochondrii is observed in the oocytes and in other cells of the ovary, where the symbiont is present in the cell cytoplasm and inside the mitochondria. No studies have so far investigated whether M. mitochondrii is present in the salivary glands of the tick and whether it is transmitted to vertebrates during the tick blood meal. To address the above issues, we developed a recombinant antigen of M. mitochondrii (to screen human sera) and antibodies against this antigen (for the staining of the symbiont). Using these reagents we show that (i) M. mitochondrii is present in the salivary glands of I. ricinus and that (ii) seropositivity against M. mitochondrii is highly prevalent in humans parasitized by I. ricinus (58%), while it is very low in healthy individuals (1·2%). These results provide evidence that M. mitochondrii is released with the tick saliva and raise the possibility that M. mitochondrii is infectious to vertebrates. Besides this, our study indicates that M. mitochondrii should be regarded as a package of antigens inoculated into the human host during the tick bite. This implies that the immunology of the response toward the saliva of I. ricinus is to be reconsidered on the basis of potential effects of M. mitochondrii and poses the basis for the development of novel markers for investigating the exposure of humans and animals to this tick species.


Asunto(s)
Alphaproteobacteria/aislamiento & purificación , Infecciones Bacterianas/diagnóstico , Mordeduras y Picaduras de Insectos/complicaciones , Ixodes/patogenicidad , Enfermedades por Picaduras de Garrapatas/diagnóstico , Alphaproteobacteria/inmunología , Alphaproteobacteria/patogenicidad , Animales , Anticuerpos Antibacterianos/sangre , Infecciones Bacterianas/epidemiología , Infecciones Bacterianas/microbiología , Femenino , Humanos , Ixodes/microbiología , Glándulas Salivales/microbiología , Estudios Seroepidemiológicos , Enfermedades por Picaduras de Garrapatas/epidemiología , Enfermedades por Picaduras de Garrapatas/microbiología
14.
New Microbiol ; 35(2): 175-82, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-22707130

RESUMEN

The aim of this study was to compare the in vitro activity and the impact on bacterial adhesion of two different catheters, one impregnated with chlorhexidine-silver sulfadiazine (C-SS) and the other not impregnated with antibacterial agents. The antimicrobial coating prevented the bacterial colonization by slime positive Staphylococcus epidermidis in the first two days. The antibacterial activity of the effluents from catheters impregnated with C-SS dissipated by day seven. Our results demonstrated that the surface treatment modified the composition of impregnated catheters and determined different contact angle values of the two catheters (impregnated and not impregnated). Examination of coated and uncoated catheter segments by scanning electron microscopy showed a good correlation with the results of adherence experiments. In conclusion, the findings suggest that C-SS coated catheters prevent in vitro bacterial adhesion.


Asunto(s)
Antibacterianos/farmacología , Adhesión Bacteriana/efectos de los fármacos , Infecciones Relacionadas con Catéteres/prevención & control , Cateterismo Venoso Central/efectos adversos , Catéteres de Permanencia/microbiología , Clorhexidina/farmacología , Sulfadiazina de Plata/farmacología , Infecciones Relacionadas con Catéteres/microbiología , Contaminación de Equipos/prevención & control , Humanos , Staphylococcus epidermidis/efectos de los fármacos , Staphylococcus epidermidis/fisiología
15.
Dig Liver Dis ; 44(6): 461-5, 2012 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-22285147

RESUMEN

BACKGROUND: Specific bacterial infections or alterations of the gut microbiota likely trigger immuno-pathological phenomena associated with Crohn's disease and ulcerative colitis. Mycobacterium avium subspecies paratuberculosis is a candidate etiological agent of Crohn's disease. Definitive causal connection between Mycobacterium avium subspecies paratuberculosis infection and Crohn's disease has not been demonstrated. AIMS: To determine the circulation of Mycobacterium avium subspecies paratuberculosis in Crohn's disease patients and water supplies in an Italian region where this bacterium is endemic in cattle farms. METHODS: Mycobacterium avium subspecies paratuberculosis screening was performed on biopsies from human patients, and from water samples, using two different PCR procedures. RESULTS: In hospitals where multiple specimens were obtained from different sites in the intestine, the prevalence of Mycobacterium avium subspecies paratuberculosis infection was 82.1% and 40% respectively in Crohn's disease and ulcerative colitis patients; in another hospital, where single specimens were obtained from patients, the bacterium was not detected. Control subjects also harboured Mycobacterium avium subspecies paratuberculosis, but at a lower prevalence. Tap water samples collected in the study area contained Mycobacterium avium subspecies paratuberculosis DNA. DISCUSSION: The results of screenings for Mycobacterium avium subspecies paratuberculosis in humans are deeply influenced by both the number and location of the collected biopsies. There is a wide circulation of the organism in the study area, considering the prevalence in humans and its presence in drinking water.


Asunto(s)
Enfermedad de Crohn/microbiología , ADN Bacteriano/aislamiento & purificación , Agua Potable/microbiología , Mycobacterium avium subsp. paratuberculosis/aislamiento & purificación , Paratuberculosis/epidemiología , Distribución de Chi-Cuadrado , Colitis Ulcerosa/microbiología , Humanos , Intestinos/microbiología , Italia/epidemiología , Paratuberculosis/complicaciones , Prevalencia
16.
Microb Drug Resist ; 18(1): 23-32, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21797666

RESUMEN

Efflux transporters have a considerable role in the multidrug resistance (MDR) of Pseudomonas aeruginosa, an important nosocomial pathogen. In this study, 45 P. aeruginosa clinical strains, with an MDR phenotype, have been isolated in a hospital of Northern Italy and characterized to identify the mechanisms responsible for their fluoroquinolone (FQ) resistance. These isolates were analyzed for clonal similarity, mutations in genes encoding the FQ targets, overexpression of specific Resistance Nodulation-cell Division efflux pumps, and search for mutations in their regulatory genes. The achieved results suggested that the mutations in genes encoding ciprofloxacin targets represented the main mechanism of FQ resistance of these strains; 97.8% of these isolates showed mutations in gyrA, 28.9% in gyrB, 88.9% in parC, and 6.7% in parE. Another mechanism of resistance was overexpression of the efflux pumps in some representative strains. In particular, overexpression of MexXY-OprM drug transporter was found in five isolates, whereas overexpression of MexCD-OprJ was detected in two isolates; surprisingly, in one of these last two isolates, also overexpression of MexAB-OprM pump was identified.


Asunto(s)
Antibacterianos/farmacología , Proteínas Bacterianas/genética , Farmacorresistencia Bacteriana Múltiple/genética , Fluoroquinolonas/farmacología , Proteínas de Transporte de Membrana/genética , Pseudomonas aeruginosa/genética , Girasa de ADN/genética , Regulación Bacteriana de la Expresión Génica , Genes Reguladores , Humanos , Pruebas de Sensibilidad Microbiana , Mutación , Pseudomonas aeruginosa/efectos de los fármacos , Pseudomonas aeruginosa/aislamiento & purificación , Técnica del ADN Polimorfo Amplificado Aleatorio
17.
An Bras Dermatol ; 86(5): 1011-5, 2011.
Artículo en Inglés, Portugués | MEDLINE | ID: mdl-22147046

RESUMEN

Leprosy is an infectious disease with an average incubation period of two to five years. It is caused by Mycobacterium leprae, mainly affecting skin, mucous membranes and peripheral nerves. When it occurs in children under fifteen, it reflects an intense and long contact period, with a high bacillary load. Therefore, it is considered an important alert sign that points to the challenge of controlling the disease. The authors report three cases of leprosy in children under fifteen that occurred in the Itaguaí district, Rio de Janeiro. The epidemiologic implications of new cases detected at this age and the fundamental role of examining the patients' close contacts and the possible identification of source cases as an effort for leprosy control are discussed.


Asunto(s)
Lepra Tuberculoide/patología , Brasil/epidemiología , Niño , Familia , Femenino , Humanos , Lepra Tuberculoide/epidemiología
18.
An. bras. dermatol ; 86(5): 1011-1015, set.-out. 2011. ilus, tab
Artículo en Portugués | LILACS | ID: lil-607474

RESUMEN

A hanseníase é uma doença infectocontagiosa, com período de incubação médio de dois a cinco anos, causada pelo Mycobacterium leprae, o qual possui tropismo para a pele, as mucosas e os nervos periféricos. Quando manifestada em crianças abaixo de quinze anos, reflete a intensidade e longo período de exposição à grande carga bacilar. Representa, então, um importante evento de alerta que aponta para uma dificuldade no controle da doença. Os autores relatam três casos de hanseníase, em menores de quinze anos, provenientes do Município de Itaguaí, Rio de Janeiro. Discutem-se as implicações epidemiológicas da detecção de novos casos nessa faixa etária e o papel fundamental do exame de contatos e da busca do caso fonte no controle da Hanseníase.


Leprosy is an infectious disease with an average incubation period of two to five years. It is caused by Mycobacterium leprae, mainly affecting skin, mucous membranes and peripheral nerves. When it occurs in children under fifteen, it reflects an intense and long contact period, with a high bacillary load. Therefore, it is considered an important alert sign that points to the challenge of controlling the disease. The authors report three cases of leprosy in children under fifteen that occurred in the Itaguaí district, Rio de Janeiro. The epidemiologic implications of new cases detected at this age and the fundamental role of examining the patients' close contacts and the possible identification of source cases as an effort for leprosy control are discussed.


Asunto(s)
Niño , Femenino , Humanos , Lepra Tuberculoide/patología , Brasil/epidemiología , Familia , Lepra Tuberculoide/epidemiología
19.
Rev Bras Parasitol Vet ; 19(1): 68-70, 2010.
Artículo en Portugués | MEDLINE | ID: mdl-20385064

RESUMEN

The aim of this study was to evaluate the efficacy of Famacha method in individual clinical diagnosis of haemonchosis in sheep from the south-west of Minas Gerais. Fifty crossbred Santa Inês ewes were evaluated during 5 months as for conjunctival mucous colour (Famacha method), Packed Cell Volume (PCV), Faecal Egg Counts (FEC), body score and clinic alterations. The score Famacha observed was from 1 to 3, the body score from 2 to 5, the PCV from 20 to 47%, and FEC from 0 to 7,750. The correlations between the parameters evaluated, except Famacha with body score, were highly significant (P < 0.0001). The main genus identified in the coprocultures was Haemonchus (87-100% of total larvae, +/- 93.5%). We observed reduction of 87.33% in the use of anthelmintics on the property. It was concluded that the Famacha method, associated with other diagnostic methods, is a useful tool to detect hemonchosis in sheep.


Asunto(s)
Hemoncosis/veterinaria , Enfermedades de las Ovejas/diagnóstico , Animales , Brasil , Hemoncosis/diagnóstico , Parasitología/métodos , Ovinos
20.
Rev. bras. parasitol. vet ; 19(1): 68-70, jan.-mar. 2010. tab
Artículo en Portugués | LILACS | ID: lil-604639

RESUMEN

O objetivo deste estudo foi observar a eficácia do método Famacha no diagnóstico clínico individual de haemoncose em ovinos provenientes do Sudoeste de Minas Gerais. Cinquenta ovelhas mestiças Santa Inês foram avaliadas durante 5 meses quanto à coloração da mucosa conjuntiva (método Famacha), volume globular (VG), ovos por grama de fezes (OPG), escore corporal e alterações clínicas. O escore Famacha observado variou de 1 a 3; o escore corporal de 2 a 5; o VG de 20 a 47 por cento; e o OPG de 0 a 7.750. As correlações entre os parâmetros avaliados, exceto Famacha com escore corporal, foram altamente significativas (P < 0,0001). O principal gênero identificado nas coproculturas foi Haemonchus (87 a 100 por cento do total de larvas, ± 93,5 por cento). Constatou-se redução de 87,33 por cento na utilização de anti-helmínticos na propriedade. Conclui-se que o método Famacha, associado a outros métodos de diagnóstico, é ferramenta útil na detecção da haemoncose em ovinos.


The aim of this study was to evaluate the efficacy of Famacha method in individual clinical diagnosis of haemonchosis in sheep from the south-west of Minas Gerais. Fifty crossbred Santa Inês ewes were evaluated during 5 months as for conjunctival mucous colour (Famacha method), Packed Cell Volume (PCV), Faecal Egg Counts (FEC), body score and clinic alterations. The score Famacha observed was from 1 to 3, the body score from 2 to 5, the PCV from 20 to 47 percent, and FEC from 0 to 7,750. The correlations between the parameters evaluated, except Famacha with body score, were highly significant (P < 0.0001). The main genus identified in the coprocultures was Haemonchus (87 - 100 percent of total larvae, ± 93.5 percent). We observed reduction of 87.33 percent in the use of anthelmintics on the property. It was concluded that the Famacha method, associated with other diagnostic methods, is a useful tool to detect hemonchosis in sheep.


Asunto(s)
Animales , Hemoncosis/veterinaria , Enfermedades de las Ovejas/diagnóstico , Brasil , Hemoncosis/diagnóstico , Parasitología/métodos , Ovinos
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