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Schistosoma mansoni infection in a natural population of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania

Published online by Cambridge University Press:  01 December 1997

C. D. M. MÜLLER-GRAF ,
D. A. COLLINS ,
C. PACKER  and
M. E. J. WOOLHOUSE
C. D. M. MÜLLER-GRAF
Affiliation:
Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK
D. A. COLLINS
Affiliation:
ICAPB, Ashworth Laboratory, University of Edinburgh, Edinburgh EH9 3JT, UK
C. PACKER
Affiliation:
Department of Ecology, Evolution and Behavior, University of Minnesota, 1987 Upper Buford Circle, St Paul, MN55108, USA
M. E. J. WOOLHOUSE
Affiliation:
Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK
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Abstract

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Infection with Schistosoma mansoni was studied in 5 troops of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania. Three troops were infected with S. mansoni. An aggregated distribution of parasites was observed among hosts. Troop membership was found to be the most significant factor influencing parasite prevalence. Age and reproductive status had no significant effect, but there was a trend for males to acquire higher levels of infection. However, age–prevalence curves showed a high infection in young baboons declining in the older baboons. Behavioural components of exposure – as measured in water-contact pattern – may be related to parasite burden. A ‘peak shift’ between infection in different age-classes in the different troops was observed: troops with higher schistosome prevalences displayed an earlier peak in prevalence of infection. The baboon troop with the most contact with people showed highest prevalence of infection possibly due to longer exposure to the parasite than the other troops and/or higher host density.

Keywords

epidemiologySchistosoma mansonibaboonswater contactspatial heterogeneity
Type
Research Article
Information
Parasitology , Volume 115 , Issue 6 , December 1997 , pp. 621 - 627
Copyright
1997 Cambridge University Press