Symptomatic and asymptomatic Cryptosporidium infections in children in a semi-urban slum community in southern India.

Cryptosporidium is a leading cause of childhood diarrhea in developing countries. We investigated symptomatic and asymptomatic cryptosporidiosis in 20 children less than two years of age in a semi-urban slum in southern India. All surveillance (conducted every two weeks) and diarrheal samples from 20 children (n = 1,036) with cryptosporidial diarrhea previously identified by stool microscopy were tested by polymerase chain reaction-restriction fragment length polymorphism for species and subgenotype determination.

Comparison of viral load and duration of virus shedding in symptomatic and asymptomatic neonatal rotavirus infections.

A single rotavirus strain causing asymptomatic infections as well as severe gastrointestinal disease has been described in the neonatal nurseries of the Christian Medical College, Vellore. In this study, quantitative real-time RT-PCR was used to determine the association of viral load with the presence of gastrointestinal symptoms in neonates. Viral load was estimated in terms of the crossing point [C(t) value] at which the amplicon could be detected in the real-time PCR assay.

Cryptosporidium species in HIV-infected individuals in India: an overview.

Cryptosporidium spp. are a major cause of diarrhoea in developing countries mainly affecting children and HIV-infected individuals with low CD4 counts. The infection is self-limiting in immunocompetent hosts, but can be severe and persistent in the immunocompromised and malnourished.

Giardia duodenalis assemblages associated with diarrhea in children in South India identified by PCR-RFLP.

Giardial diarrhea in a birth cohort of 452 children in an urban slum in South India was characterized. Of the 155 episodes that occurred in 99 children, 73% were acute diarrhea. Children with better educated mothers and a toilet at home had lower odds of acquiring giardial diarrhea, whereas low socioeconomic status and drinking municipal water were associated with greater risk.