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1.
Mem. Inst. Oswaldo Cruz ; 103(1): 98-103, Feb. 2008. ilus, tab
Artículo en Inglés | LILACS | ID: lil-478870

RESUMEN

The purpose of this study was to investigate the genotypes of Giardia lamblia from human and animal feces and their epidemiological and clinical characteristics in Argentina, South America. Seventy isolates, 60 from humans (adults and children), eight from dogs and two from cows were processed by polymerase chain reaction-restriction fragment length polymorphism. Data corresponding to demographic, socio-cultural and environmental variables and presence/absence of signs/symptoms were collected. The triosephosphate isomerase gene was amplified from 43 (71.66 percent) of the 60 human fecal samples. Among these, 3/43 (6.98 percent) were genotype AII and 40/43 (93.02 percent) were genotype B. Assemblage AII was detected in three children who lived together in a shantytown and they were oligosymptomatic and none had diarrhea. This genotype was not found in animals. Genotype B showed a high prevalence in both adults and children. It was also found in polysymptomatic people, many of whom presented diarrhea. It was also found only in one dog. The present study represents the first contribution to the knowledge of G. lamblia genotypes in Argentina.


Asunto(s)
Adolescente , Adulto , Animales , Bovinos , Niño , Preescolar , Perros , Femenino , Humanos , Lactante , Masculino , ADN Protozoario/genética , Heces/parasitología , Giardia lamblia/genética , Giardiasis/parasitología , Triosa-Fosfato Isomerasa/genética , Argentina , Genotipo , Giardia lamblia/enzimología , Giardia lamblia/aislamiento & purificación , Giardiasis/diagnóstico , Reacción en Cadena de la Polimerasa , Polimorfismo de Longitud del Fragmento de Restricción , Factores de Riesgo
2.
Rev. Inst. Med. Trop. Säo Paulo ; 41(1): 45-58, Jan.-Feb. 1999. tab
Artículo en Inglés | LILACS | ID: lil-236723

RESUMEN

Os isolados de Giardia duodenalis de individuos assintomaticos, de pacientes e de animais apresentam diferencas e semelhancas em sua composicao proteica, expressao de antigenos, proteases e isoenzimas, assim como na constituicao dos acidos nucleicos. A presente revisao analisa estas diferencas com enfase na interacao parasita e hospedeiro, e nos possiveis mecanismos de virulencia do protozoario


Asunto(s)
Humanos , Animales , Giardia lamblia/aislamiento & purificación , Interacciones Huésped-Parásitos/inmunología , Ácidos Nucleicos/análisis , Antígenos de Protozoos/análisis , ADN/análisis , Electroforesis , Giardia lamblia/enzimología , Giardia lamblia/inmunología , Isoenzimas/análisis , Inhibidores de Proteasas/análisis
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