The influence of salinity on the cercariae of three species of Schistosoma

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Abstract

Donnelly F. A., Appleton C. C. and Schutte C. H. J. 1984. The influence of salinity on the cercariae of three species of Schistosoma. International Journal for Parasitology 14: 13-21. The effect of salinity on the longevity and infectivity of cercariae of Schistosoma mattheei, Schistosoma haematobium and Schistosoma mansoni was determined. No significant differences in cercarial longevity occurred (p > 0.05) in low salinities (0-5.25%), whereas further increases in salinity resulted in progressive decreases in survival. In salinities ≳ 17.5%, cercariae were incapable of surviving for longer than 11 min. A maximum life-span of up to 122 h was recorded for some S. mattheei cercariae. Cercarial infectivity, as indicated by worm returns, was reduced progressively with increasing salinity up to a lethal limit of 10.5%. Differences in the salinity tolerance of the cercariae of the three species were discussed. © 1984.

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Donnelly, F. A., Appleton, C. C., & Schutte, C. H. J. (1984). The influence of salinity on the cercariae of three species of Schistosoma. International Journal for Parasitology, 14(1), 13–21. https://doi.org/10.1016/0020-7519(84)90005-5

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