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Large-Scale Laboratory Maintenance of Schistosoma mansoni, with Observations on Three Schistosome/Snail Host Combinations

Fred A. Lewis, Margaret A. Stirewalt, Cecilia P. Souza and Giovanni Gazzinelli
The Journal of Parasitology
Vol. 72, No. 6 (Dec., 1986), pp. 813-829
DOI: 10.2307/3281829
Stable URL: http://www.jstor.org/stable/3281829
Page Count: 17
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Large-Scale Laboratory Maintenance of Schistosoma mansoni, with Observations on Three Schistosome/Snail Host Combinations
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Abstract

This review discusses the large-scale laboratory maintenance of Schistosoma mansoni. Emphasized are features which increase efficiency in such facilities, and problems most frequently encountered. Profiles are given of the long-term, high-level production of 3 strains of S. mansoni. Two of the strains, NMRI and PR-1, were of Puerto Rican origin and the other, LE, was from Brazil. Three to 8 million cercariae of each strain were usually obtained per week. The most obvious differences between the 3 strains were cercarial output per snail and snail mortality rates. Maintenance problems encountered were usually related to water quality, temperature, genetics of the parasite or snail host, predators or contaminants, feeding, or crowding of snails. Examination of the production data from these 3 life cycles led to identification of features that could be of benefit for increasing the productivity and efficiency of other S. mansoni life cycles used in research activities.

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