An international collaborative study of an anti-infectious bursal disease virus reference serum |
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Authors: | N E Reed D H Thornton C N Hebert J C Muskett G W Wood |
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Affiliation: | Central Veterinary Laboratory, Weybridge, Surrey, England. |
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Abstract: | Fourteen laboratories participated in a collaborative study of a freeze-dried preparation of anti-infectious bursal disease virus serum to assess the suitability of the serum as a standard for use in the infectious bursal disease virus neutralization test. Ten laboratories carried out micro-virus neutralization tests and six carried out plaque reduction tests, two laboratories carrying out both tests. When titres were expressed as a proportion of that obtained for a reference preparation there was a marked reduction in variation between results from different laboratories. The use of a reference preparation was therefore of value when comparing results from different laboratories. It is proposed that the reference preparation used in this study be used as a standard to facilitate the comparison of results from different laboratories. The proposed standard contains by definition 10,000 UK units. |
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