摘要：The Central Veterinary Laboratory, Weybridge, England, was requested by the WHO Expert Committee on Biological Standardization to obtain suitable material for an international reference preparation of tylosin and to arrange a collaborative assay. A batch of 150 g of highly purified tylosin was assayed by ten laboratories in nine countries against the tylosin standard of a commercial manufacturer. On the basis of the results obtained, the material has been established as the International Reference Preparation of Tylosin and the International Unit for Tylosin has been defined as the activity contained in 0.001 mg of the International Reference Preparation of Tylosin. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (878K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 921 922 923 924 925 926 927 928 929 930 931 932
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