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Journal of Tropical Pediatrics 1992 38(2):57-63; doi:10.1093/tropej/38.2.57
© 1992 by Oxford University Press
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Age-specific Sero-prevalence of Amoebiasis and Giardiasis in Southern Indian Infants and Children

N. Shetty*, M. Narasimha*,, E. Elliott**, I. S. Raj* and R. Macaden*

*Department of Microbiology, St. John's Medical College Bangalore – 560 034, India
**Department of Child Health, University of Leicester Leicester LE2 7 LX, UK

Correspondence: Dr Nandini Shetty, Department of microbiology, St. John's Medical College, Bangalore-560034, India.

The age-specific sero-prevalence of amoebiasis and giardiasis was estimated in 91 pediatric diarrhoea and in 70 non-diarrhoeal cases from Southern India. Anti-amoeba/giardia IgG assays on 20 children with inflammatory bowel disease from the UK yielded base-line levels in a non-endemic symptomatic population. IgG, IgM, and IgA levels were estimated to E. histolytica andG. lamblia using an ELISA. Concomittant faecal examinations were done for the Indian children. There was a significant correlation between acquisition of sero-positivity and age. A rise in the IgG response to both organisms was evident between 38 and 47 and 13–24 months, respectively, in diarrhoeal and non-diarrhoeal cases. An appreciable IgM response occurred predominantly in diarrhoea cases and at a younger age (<24 months). IgA responses were low. Anti-protozoal IgG levels in the UK children were negligible. There was no relationship between faecal excretion and sero-positivity. The study shows an age-related antibody response to E. histolytica and G. lamblia.


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