Typing of Campylobacter fetus fetus isolated from sheep abortions in N.Z.
We are concerned that the letter from Collins and de Lisle, reporting their R.E. analysis findings on a number of specially selected Campylobacter fetus fetus isolates, may be incorrectly interpreted by some veterinarians. In the South Island, the area of highest incidence, the current position is that strain 5915, the vaccine strain, is responsible for about 80% of Campylobacter fetus fetus abortions while strain 7438 is responsible for about 15%. Thus, the statement concerning the vaccine strain as the “second most common type”, refers only to those isolates tested by the authors and specifically chosen in that some did not react against the vaccine strain. In the North Island where such selectivity was not utilised, only one type E and one type B did not react with vaccine antisera. It is also noted that the work of Border and Firehammer applies to cattle rather than sheep, and the reference to the work of Quinlivan and Jopp does not in fact show that the vaccine was “partially effective”…
Keywords: Abortion; Campylobacter; Reproduction - female; Sheep; Vaccination
Document Type: Regular Paper
Publication date: 01 July 1985
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