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Bulletin of the World Health Organization : 1976; Volume 54; Volume 54, Number 4, Year 1976 54 (4), Pages 417-420: Effects of Environmental Factors on the Molluscicidal Activities of Slow-Release Hexabutyldistannoxane and Copper Sulfate

By K. Y. Chu

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Book Id: WPLBN0000057469
Format Type: PDF eBook
File Size: 0.2 MB
Reproduction Date: 2005

Title: Bulletin of the World Health Organization : 1976; Volume 54; Volume 54, Number 4, Year 1976 54 (4), Pages 417-420: Effects of Environmental Factors on the Molluscicidal Activities of Slow-Release Hexabutyldistannoxane and Copper Sulfate  
Author: K. Y. Chu
Volume:
Language: English
Subject: Health., Public health, Wellness programs
Collections: Medical Library Collection, World Health Collection
Historic
Publication Date:
Publisher: World Health Organization

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Chu, K. Y. (n.d.). Bulletin of the World Health Organization : 1976; Volume 54; Volume 54, Number 4, Year 1976 54 (4), Pages 417-420. Retrieved from http://www.worldlibrary.net/


Description
Medical Reference Publication

Excerpt
In many investigations in the field of diphtheria and tetanus, especially in those concerned with estimating the level of immunity or the response to a vaccination procedure, the titration of antitoxin in the blood of man or animals plays an important - ~ role. The chief points of interest in these methods are the orecision. the minimum antitoxin level that can be measured, and the amount of serum required for the test. The titration of high-titre hyperimmune sera for prophylactic or therapeutic purposes forms a separate subject. This is omitted from the present discussion since the precision required is usually much greater whereas the minimum measurable level and the amount of serum required are relatively less important. International standards for diphtheria antitoxin and tetanus antitoxin have been in use for many years and these standards--or national reference .re o .oa r at ions calibrated ag-a inst them in international units-are used for the titration of sera. The methods used to establish and assay these international standards are not very clear, as records are scarce.

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