title: Entamoeba histolytica and/or Entamoeba dispar: infection frequency in HIV+/AIDS patients in Mexico city.
abstract: The objective of this work was to evaluate the frequency of Entamoeba histolytica/Entamoeba dispar intestinal infection in HIV+/AIDS subjects and their HIV- close relatives or sexual partners. Enteric parasites were investigated in stool samples by microscopic examination and E. histolytica and E. dispar were identified by PCR. We found by microscopic analysis in HIV+/AIDS group that the E. histolytica/E. dispar complex was present in 5.9% of the members, while in the HIV- group was 2.9%. With PCR we found that the E. histolytica prevalence was 25.3% in the HIV+/AIDS group and 18.5% in the HIV-group. The difference in the results obtained with the microscopic and PCR is due to the different sensibility of the procedures. Besides, we found patients who were infected with E. histolytica in both groups were asymptomatic cyst passers. Our results suggest that E. histolytica strains prevalent in the studied community appear to be of low pathogenic potential.
authors.affiliation: Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico Distrito Federal, Mexico.
authors.forename: Patricia
authors.initials: P
authors.lastname: Moran
authors.forename: Fernando
authors.initials: F
authors.lastname: Ramos
authors.forename: Manuel
authors.initials: M
authors.lastname: Ramiro
authors.forename: Octavio
authors.initials: O
authors.lastname: Curiel
authors.forename: Enrique
authors.initials: E
authors.lastname: González
authors.forename: Alicia
authors.initials: A
authors.lastname: Valadez
authors.forename: Alejandro
authors.initials: A
authors.lastname: Gómez
authors.forename: Gabriela
authors.initials: G
authors.lastname: García
authors.forename: Emma I
authors.initials: EI
authors.lastname: Melendro
authors.forename: Cecilia
authors.initials: C
authors.lastname: Ximénez
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000453:epidemiology* / Q000469:parasitology; D000818:Animals; D004747:Entamoeba / Q000235:genetics / Q000302:isolation & purification / Q000472:pathogenicity; D004748:Entamoeba histolytica / Q000235:genetics / Q000302:isolation & purification* / Q000472:pathogenicity; D004749:Entamoebiasis / Q000150:complications / Q000453:epidemiology* / Q000469:parasitology; D005190:Family; D005243:Feces / Q000469:parasitology; D015658:HIV Infections / Q000150:complications; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000150:complications / Q000453:epidemiology / Q000469:parasitology; D008800:Mexico / Q000453:epidemiology; D016133:Polymerase Chain Reaction; D015995:Prevalence; D012747:Sexual Partners