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Listar por autor "Durand Vara, David Percy"
Mostrando ítems 1-20 de 20
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Riveros Ramirez, Maribel Denise; Pons, Maria J.; Durand Vara, David Percy; Ochoa Woodell, Theresa Jean; Ruiz, Joaquim (American Society of Tropical Medicine and Hygiene, 2023)Class 1 and Class 2 integrons are mobilizable elements able to carry a variety of antibiotic resistance determinants. In the present study, Class 1 and 2 integrons present in 355 pathogenic Escherichia coli (285 diarrheagenic, ...
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Paredes Sosa, José Luis; Navarro Hoyos, Rafaella Alexandra; Durand Vara, David Percy; Ochoa Woodell, Theresa Jean (Oxford University Press, 2023)This study aimed to detect the frequency of Cryptosporidium infection and associated risk factors among children from rural areas in Peru. A case-control study was conducted, nested in a cohort in two rural communities ...
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Durand Vara, David Percy; Ochoa Woodell, Theresa Jean; Bellomo, Sicilia M. E.; Contreras, Carmen A.; Bustamante, Víctor H.; Ruiz, Joaquim; Cleary, Thomas G. (Wolters Kluwer Health, 2013)Some enteropathogens use the type III secretion system to secrete proteins that allows them to interact with enterocytes and promote bacterial attachment or intracellular survival. These proteins are Salmonella invasion ...
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Acosta, Gonzalo-J.; Vigo, Natalia-I.; Durand Vara, David Percy; Riveros Ramirez, Maribel Denise; Arango, Sara; Zambruni, Mara; Ochoa Woodell, Theresa Jean (American Society of Tropical Medicine and Hygiene, 2016)Diarrheagenic Escherichia coli (DEC) are common pathogens of childhood gastrointestinal infections worldwide. To date, research tracking DEC has mainly been completed in urban areas. This study aims to determine the ...
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Qquellon Palacios, Luz Jazmín; Vargas Rivera, Silver Keith; Eguiluz, Maria; Vasquez, Francesca; Durand Vara, David Percy; Allan-Blitz, Lao-Tzu; Konda, Kelika Anne; Ochoa Woodell, Theresa Jean; Caceres Palacios, Carlos Fernando; Klausner, Jeffrey D (SAGE Publications, 2023)Background: The increasing prevalence of drug-resistant Neisseria gonorrhoeae (NG) infections has caused great concern. Ciprofloxacin remains the empiric antimicrobial recommended to treat NG infections in Peru disregarding ...
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Mercado, Erik H.; Ochoa Woodell, Theresa Jean; Ecker, Lucie; Cabello Vílchez, Alfonso Martín; Durand Vara, David Percy; Barletta, Francesca; Molina, Margarita; Gil, Ana I.; Huicho Oriundo, Luis; Lanata, Claudio F.; Cleary, Thomas G. (American Society for Microbiology, 2011)The purpose of this study was to determine the presence and quantity of fecal leukocytes in children infected with diarrheagenic Escherichia coli and to compare these levels between diarrhea and control cases. We analyzed ...
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Ochoa Woodell, Theresa Jean; Mercado, E.H.; Durand Vara, David Percy; Rivera, F.P.; Mosquito, S.; Contreras, C.; Riveros Ramirez, Maribel Denise; Lluque, A.; Barletta, F.; Prada, A.; Ruiz, Joaquim (Instituto Nacional de Salud, 2011)Introduction. Diarrheagenic E. coli (DEC) are a major cause of diarrhea in children in developing countries. However, they are not part of routine diagnosis in clinical laboratories. Objectives. To determine the DEC ...
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Contreras, C.A.; Ochoa Woodell, Theresa Jean; Ruiz, J.; Lacher, D.W.; Durand Vara, David Percy; Debroy, C.; Lanata, C.F.; Cleary, T.G. (Microbiology Society, 2012)The aim of this study was to determine the frequency and allele associations of locus of enterocyte effacement encoded esp and tir genes among 181 enteropathogenic Escherichia coli (EPEC) strains (90 diarrhoea-associated ...
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Gomes, Claudia; Pons, Maria J.; Magallon-Tejada, Ariel; Durand Vara, David Percy; Lluque, Angela; Mosquito, Susan; Riveros Ramirez, Maribel Denise; Mercado, Erik; Prada, Ana; Ochoa Woodell, Theresa Jean; Ruiz, Joaquim (Mary Ann Liebert, 2013)Three clinical isolates of E. coli and one S. boydii isolated from feces samples collected from children under 5 years of age with diarrhea in Lima, Peru were inoculated onto Mueller-Hinton plates containing increasing ...
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Riveros Ramirez, Maribel Denise; García, Wilfredo; García Apac, Coralith Marlinda; Durand Vara, David Percy; Mercado, Erik; Ruiz, Joaquim; Ochoa Woodell, Theresa Jean (American Society of Tropical Medicine and Hygiene, 2017)Escherichia coli is an important cause of Gram-negative bacteremia. The aim of this study was to characterize at the molecular and phenotypic levels E. coli strains belonging to different diarrheagenic pathotypes [diarrheagenic ...
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Mosquito, S.; Ruiz, Joaquim; Pons, M.J.; Durand Vara, David Percy; Barletta, F.; Ochoa Woodell, Theresa Jean (Elsevier, 2012)Diarrhoeagenic Escherichia coli (DEC) are an important cause of diarrhoea in children and are associated with high antibiotic resistance. However, there are few studies on the molecular mechanisms of resistance in this ...
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Mercado, Erik-H.; Piscoche, Cristian; Contreras, Carmen; Durand Vara, David Percy; Riveros Ramirez, Maribel Denise; Ruiz, Joaquim; Ochoa Woodell, Theresa Jean (Elsevier, 2016)EPEC is an attaching and effacing diarrheal pathogen that carries a large pathogenicity island, locus for enterocyte effacement (LEE). Recently, the pathogenicity island PAI O-122 was described among non-LEE effectors and ...
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Riveros Ramirez, Maribel Denise; Barletta, F.; Cabello Vílchez, Alfonso Martín; Durand Vara, David Percy; Mercado, E.H.; Contreras, C.; Rivera, F.P.; Mosquito, S.; Lluque, A.; Ochoa Woodell, Theresa Jean (Instituto Nacional de Salud, 2011)Introduction. Diffusely adherent E. coli (DAEC) is the sixth recognized group of diarrheagenic E. coli. However, its association with diarrhea remains controversial. Variability in the adherence patterns of clinical strains ...
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Durand Vara, David Percy; Contreras, Carmen A.; Mosquito, Susan; Ruíz, Joaquim; Cleary, Thomas G.; Ochoa Woodell, Theresa Jean (Taylor and Francis, 2016)Enteroaggregative Escherichia coli (EAEC) causes acute and persistent diarrhea among children, HIV-infected patients, and travelers to developing countries. We have searched for 18 genes-encoding virulence factors associated ...
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Ruiz Roldán, Lidia; Martínez Puchol, Sandra; Gomes, Cláudia; Palma, Noemí; Riveros Ramirez, Maribel Denise; Ocampo, Karen; Durand Vara, David Percy; Ochoa Woodell, Theresa Jean; Ruiz, Joaquim; Pons, Maria J. (Instituto Nacional de Salud, 2018)Objetivos. El objetivo del presente estudio fue describir la presencia de Enterobacteriaceae en muestras de carne recolectadas en mercados tradicionales de Lima y establecer los niveles de resistencia a antimicrobianos y ...
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Cabrera Sosa, Luis Esteban (Universidad Peruana Cayetano HerediaPE, 2017)Introducción: Pseudomonas aeruginosa es una bacteria oportunista que usa el sistema de secreción tipo III (T3SS) para infectar a su hospedero. Por otro lado, la leche materna otorga protección al recién nacido mediante las ...
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Durand Vara, David Percy; Alvarez, Daniela; Diaz, David; Mercado, Erik; Ruiz, Joaquim; Ochoa Woodell, Theresa Jean (Elsevier, 2020)INTRODUCTION: We evaluated the presence of sIgA in saliva, versus Escherichia coli secreted proteins (Esp) related to the type III secretion system (T3SS), and its semi-quantitative concentration in children under 2 years-old ...
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Zambruni, Mara; Ochoa Woodell, Theresa Jean; Somasunderam, Anoma; Cabada, Miguel M.; Morales Fernández, María Luisa; Mitreva, Makedonka; Rosa, Bruce A.; Acosta, Gonzalo J.; Vigo, Natalia I.; Riveros Ramirez, Maribel Denise; Arango, Sara; Durand Vara, David Percy; Berends, Maitreyee N.; Melby, Peter; Utay, Netanya S. (American Society of Tropical Medicine and Hygiene, 2019)Stunting, defined as height-for-age Z score equal to or lower than -2, is associated with increased childhood mortality, cognitive impairment, and chronic diseases. The aim of the study was to investigate the relationship ...
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Lluque, Angela; Mosquito, Susan; Gomes, Claudia; Riveros Ramirez, Maribel Denise; Durand Vara, David Percy; Tilley, Drake H.; Bernal, Maria; Prada, Ana; Ochoa Woodell, Theresa Jean; Ruiz, Joaquim (Elsevier, 2015)The study was aimed to describe the serotype, mechanisms of antimicrobial resistance, and virulence determinants in Shigella spp. isolated from Peruvian children. Eighty three Shigella spp. were serogrouped and serotyped ...
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Gomes, Cláudia; Martínez-Puchol, Sandra; Durand Vara, David Percy; Lluque, Angela; Mosquito, Susan; Ochoa Woodell, Theresa Jean; Ruiz, Joaquim (Elsevier, 2013)The aim of this study was to develop in vitro azithromycin (AZM)-resistant mutants of Escherichia coli and Shigella spp. in the presence of Phe-Arg β-naphthylamide (PAβN) and to observe which AZM resistance mechanisms other ...
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