Epidemloiological Analysis of Staphylococcus aureus Isolated from Cows and the Environment of a Dairy Farm in Japan

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概要

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• A case of Staphylococcus aureus intramammary infection (IMI) on a Japanese dairy farm was monitored for 9 months. S. aureus isolates from cows and environmental samples consisted of specific strains with sequence types 352 and 705, as determined by multilocus sequence typing. Clonal strains of these sequence types are isolated from cows worldwide, indicating that they are adapted to the bovine environment. These results explain why many IMI cases are persistent and lead to subclinical mastitis. The strain isolated from milk was identical to those isolated from the cows bodies and cows carrying S. aureus, milking units, personnel, heifers, and cats in the dairy barn. These locations and factors should be emphasized as sources and route of strains causing IMI.

著者

• Hata Eiji

  Hokkaido Research Station, National Institute of Animal Health

• Kobayashi Hideki

  National Institute of Animal Health

• Nakajima Hiromi

  Matsumoto Livestock Hygiene Service Center

• SHIMIZU Yuka

  Himeji Livestock Hygiene Service Center

• EGUCHI Masashi

  Hokkaido Research Station, National Institute of Animal Health

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