Journal
ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY
Volume 100, Issue 2, Pages 123-135Publisher
MANEY PUBLISHING
DOI: 10.1179/136485906x86275
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If a programme for the control of pig cysticercosis is to be effective it has to be based on good data on the local epidemiology of Taenia solium. In 2002 - 2003, in a cross-sectional study of pig cysticercosis in the Mexican state of Morelos, 1747 pigs that had been born and reared in rural areas of the state were checked for T. solium infection by tongue inspection. The prevalence of cysticercosis in the pigs was found to vary from 0% to 30% according to the municipality from which the pigs came. Although prevalence appeared to be unaffected by the socio-economic status of the municipality, it was relatively high in areas that lacked latrines, and in pigs that were castrated, pregnant and/or of the native (rather than an imported) breed. The results of questionnaire-based interviews with pig owners revealed that most (64.5%) of the rural pigs, whether infected or not, are slaughtered and consumed within the locality where they were reared. The other pigs are sold at low prices to organised traffickers who take the uninspected pigs to neighbouring urban areas for sale. The observed complexity in the factors affecting the transmission of T. solium to the pigs of Morelos state calls for an intervention strategy of matching complexity, initially targeted at those villages with the highest prevalences of pig cysticercosis. The road transport of pigs needs to be better regulated, and the vaccination and genetic improvement of the rural pigs, and delaying the castration of the boars, should all be considered.
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