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Further studies on the compatibility betweenS. intercalatum from Cameroun and Zaïre and species ofBulinus

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Summary

The results from the infection experiments withSchistosoma intercalatum from Cameroun and from Zaïre and the intermediate hosts, belonging toB. forskalii andB. globosus, could be divided into groups according to the degree of compatibility with the schistosomes. This was indicated by the total cercariae production per 100 exposed snails (TCP/100 exp. snails).

B. forskalii from Kinshasa, Zaïre were the snails which were most compatible withS. intercalatum from Cameroun, andB. globosus populations tested were refractory. The TCP/100 exposed snails was about 300,000 for the populations ofB. forskalii from Kinshasa compared with the low production forB. forskalii from Cameroun of 125,000B. wrighti from South Arabia produced 155,000 cercariae per 100 exposed snails.

B. cernicus from Mauritius could be separated into two types according to the compatibility withS. intercalatum from Cameroun, the TCP/100 exposed snails was 31,000 and 267,000, respectively.

B. globosus from Kinshasa, Zaïre, was very compatible withS. intercalatum from Zaïre and the TCP/100 exposed snails was very high, about 300,000. An albino strain ofB. globosus from Rhodesia was the most compatible snail having a TCP/100 exposed snails of 2.4 million cercariae. Other strains ofB. globosus from Cameroun and Togo were refractory and less susceptible.

It was also possible to infectB. africanus and the two tested populations from Kenya and Tanzania, producing 15,000 and 179,000 cercariae per 100 exposed snails, respectively.

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  1. Danish Bilharziasis Laboratory, Jaegersborg Alle I D, DK-2920, Chartottenlund, Denmark

    Flemming Frandsen

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  1. Flemming Frandsen
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Frandsen, F. Further studies on the compatibility betweenS. intercalatum from Cameroun and Zaïre and species ofBulinus . Z. Parasitenkd. 58, 161–167 (1979). https://doi.org/10.1007/BF01951340

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  • DOI: https://doi.org/10.1007/BF01951340

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