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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 101, No. s1, 2006, pp. 63-71
Bioline Code: oc06168
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 101, No. s1, 2006, pp. 63-71

 en The spatial distribution of Schistosoma mansoni check for this species in other resources infection before and after chemotherapy in the Jequitinhonha Valley in Brazil
Andrea Gazzinelli; Allen Hightower; Philip T LoVerde; Joäo Paulo Amaral Haddad; Wesley Rodrigues Pereira; Jeffrey Bethony; Rodrigo Correa-Oliveira & Helmut Kloos

Abstract

Schistosomiasis prevalence and egg counts remained low one year after chemotherapy in most households in a hyperendemic rural area in northern Minas Gerais but several distinct spatial patterns could be observed in relation to IgE levels and to a lesser extent to exposure risk (TBM) and type of water supply. An inverse relationship between pre-treatment household prevalence and egg counts on the one hand and post-treatment IgE levels on the other were noted in two of the five communities. Low exposure risk was associated with the low pre-treatment infection rates in the central village but did not contribute to the decline of infection rates after chemotherapy in the study area, as indicated by the significant increase in water contact during the posttreatment period (p < 0.0001). Distance between households and the streams and socioeconomic factors were also unimportant in predicting the spatial distribution of infection. These results are consistent with the production and antiparasitic effect of high levels of IgE in Schistosoma mansoni check for this species in other resources infection.

Keywords
schistosomiasis - chemotherapy - spatial clustering - IgE antibodies - exposure risk - nursing - Brazil

 
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