par Schwetz, Jacques
Référence Transactions of the Royal Society of Tropical Medicine and Hygiene, 44, 5, page (501-510,IN1-IN2,511-514)
Publication Publié, 1951-04
Article révisé par les pairs
Résumé : 1. (1) In September, 1949, the D.M.O., Lira, Lango District (Uganda), J. Gordon Brown, discovered vesical bilharzia in three schools in the southwestern part of the district, near the Nile, and we were invited to investigate the source of the endemic. 2. (2) Amongst various fresh water snails we found Pyrgophysa forskalii and Physopsis nasuta, which were especially abundant in the water holes (pools and ponds) surrounding the hamlets where the natives use the water for drinking and washing and for watering cattle. 3. (3) Many Pyrgophysa were found free from Schistosoma cercariae. Butin several holes a certain percentage of Physopsis shedding them was found. 4. (4) Animal experiments proved that the Schistosoma cercariae found in the Physopsis belong to two different species: S. bovis and S. haematobium. Consequently it is Ph. nasuta which is responsible for vesical bilharzia in this country. 5. (5) The only constant difference between S. bovis and S. haematobium is the shape of the eggs, as the length of the united caecum and the vitelline glands varies a little even in the same species. 6. (6) Vesical bilharzia is very common in the area in question, and was found in all the schools we visited, also in certain villages where the natives did not conceal it (for fear of injections). 7. (7) Treatment when left to the native assistants and orderlies was not efficacious. 8. (8) As water holes containing snails abound in the country, the systematic destruction of the latter seems very difficult, although the attempt seems well worth while. 9. (9) We proposed therefore that a special medical organization for the systematic treatment of all the natives affected, in the villages as in the schools, should be set up. Miracil (nilodin) should be tried. © 1951.

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