Schistosoma mansoni control in Cul de Sac valley, Saint Lucia. I. A two-year focal surveillance-mollusciciding programme for the control of Biomphalaria glabrata
1980; Oxford University Press; Volume: 74; Issue: 4 Linguagem: Inglês
10.1016/0035-9203(80)90064-4
ISSN1878-3503
AutoresG. Barnish, John D. Christie, M. A. Prentice,
Tópico(s)Global Maternal and Child Health
ResumoAn area-wide mollusciciding campaign in Cul de Sac valley, St. Lucia reduced incidence of Schistosoma mansoni from 22% to 4·3% between 1970 and 1975. Following this, a two-year focal surveillance-mollusciciding programme was introduced. Sites of potential transmission of S. mansoni were identified and routinely searched for Biomphalaria glabrata. If found, the site was treated with clonitralide 25% emulsifiable concentrate. Two chemotherapy campaigns supplemented the snail control programme. As a result of the combined measures, incidence of the infection dropped from 4·3% to 1·0% and from 2·2% to 0·6% in areas originally of high and low transmission respectively. The cost of protecting the 7,000 population was US $20,362: of these costs, labour absorbed 68%, transport 24%, equipment 4% and molluscicide 4%. The cost per person per year protected was US $1·45 which compares favourably with the $3·24 of the previous scheme. Although effective and relatively cheap, this programme was still dependent on a high standard of supervision for maximum benefit.
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