منابع مشابه
The occurrence of Schistosoma mattheei in the south-western Transvaal.
To determine whether Schistosoma mattheei is present in the south-western Transvaal, sixty habitats were searched for the intermediate host snail, Bulinus africanus. Ten populations of this snail were located, 2 of which were infected with S. mattheei. Eggs of one of these isolates, originating from a spring in the Mooi River, were examined with an optical microscope. Scanning electron microgra...
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During November 1985 a survey was carried out to determine the prevalence and causes of blindness in the Elim Hospital district of Gazankulu in the Northern Transvaal, South Africa, and to assess the Eye Department's effectiveness in preventing blindness. Using a random cluster sample technique, we screened 18,962 of the estimated 71,200 inhabitants of the district (26.6%). We found 109 blind p...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1904
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1904)32<124b:tto>2.0.co;2