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Historical : Official Records : Issue 9F: Actes Officiels Organisation Mondiale de la Sante

By Andrija Stampar, Dr.

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Book Id: WPLBN0000045865
Format Type: PDF eBook
File Size: 14.8 MB
Reproduction Date: 2005

Title: Historical : Official Records : Issue 9F: Actes Officiels Organisation Mondiale de la Sante  
Author: Andrija Stampar, Dr.
Language: English
Subject: Health., Public health, Wellness programs
Collections: Medical Library Collection, World Health Collection
Publication Date:
Publisher: World Health Organization


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Dr, A. S. (n.d.). Historical : Official Records : Issue 9F. Retrieved from

Medical Reference Publication

Primarily, the survey reported here nias intended as an attempt, not so much to correlate the presence of snails and the chemical conlposition of the waters in which they occur, as to conlpile general ecological data essential to further research mork on the intermediate hosts of bilharziasis. The \vork Jas an extension of the programme initiated by de lieillon and others (1958), undertaken to form a baseline for future hydrobiological research. Although laboratory work (Chernin & Michelson, 1957; Wright, 1960) has demonstrated the marked influence of dissolved salts on snail intermediate hosts, attempts to find a sinlple correlation between local snail distribution and chemical properties of natural waters have been very disappointing (de Meillon et al., 1958). This is probably due to the very wide actual or incipient tolerance range of these animals (Hunter, 1961) and the fact that local waters show few extremes of the sort found by Sioli (1953) in South America.

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