Genetic and antigenic analysis of Chlamydia pecorum strains isolated from calves with diarrhea

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  • OHTANI Akifumi
    Yamaguchi Chubu Livestock Hygiene Service Center, 671-5 Kagawa, Yamaguchi 754–0897, Japan
  • KUBO Masahito
    Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677–1 Yoshida, Yamaguchi 753–8515, Japan
  • SHIMODA Hiroshi
    Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677–1 Yoshida, Yamaguchi 753–8515, Japan
  • OHYA Kenji
    Laboratory of Veterinary Microbiology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan
  • IRIBE Tadashi
    Yamaguchi Chubu Livestock Hygiene Service Center, 671-5 Kagawa, Yamaguchi 754–0897, Japan
  • OHISHI Daiki
    Yamaguchi Chubu Livestock Hygiene Service Center, 671-5 Kagawa, Yamaguchi 754–0897, Japan
  • ENDOH Daiji
    School of Veterinary Medicine Department of Veterinary Medicine, Rakuno Gakuen University, 583 Bunkyodai Midorimachi, Ebetsu, Hokkaido 069–8501 Japan
  • OMATSU Tsutomu
    Research and Education Center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3–8–1 Harumi-cho, Fuchu, Tokyo 183–0057, Japan
  • MIZUTANI Tetsuya
    Research and Education Center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3–8–1 Harumi-cho, Fuchu, Tokyo 183–0057, Japan
  • FUKUSHI Hideto
    Laboratory of Veterinary Microbiology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan
  • MAEDA Ken
    Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677–1 Yoshida, Yamaguchi 753–8515, Japan

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タイトル別名
  • Genetic and antigenic analysis of <i>Chlamydia pecorum</i> strains isolated from calves with diarrhea

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Chlamydia pecorum (designated 22–58) was isolated in 2010 in HmLu-1 cells from the jejunum of a calf which died of necrotizing enterocolitis in Yamaguchi Prefecture, Japan. Immunohistochemical staining identified C. pecorum positive reactions in the jejunal villi. C. pecorum, designated 24–100, was isolated from the feces of a calf with diarrhea in another farm in Yamaguchi Prefecture in 2012. A significant increase in neutralizing antibody titers against C. pecorum was confirmed in paired sera. Nucleotide sequence identities of omp1 genes of the 2 isolates were 100%. The isolates were genetically and antigenically more closely related to C. pecorum Bo/Yokohama strain isolated from cattle with enteritis in Japan than to the other prototype strains, Bo/Maeda isolated from cattle with pneumonia and Ov/IPA isolated from sheep with polyarthritis. These results indicate that C. pecorum strains similar to 22–58 and 24–100 might be endemic in Yamaguchi Prefecture and cause enteric disease in cattle.

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