Occurrence of a Pig Respiratory Disease Associated with Swine Influenza A (H1N2) Virus in Tochigi Prefecture, Japan

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概要

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• In February 2008, a feeder pig herd of the affected farm in Tochigi Prefecture, Japan, showed increasing respiratory symptoms; by April, the situation worsened with 12–16 pigs dying daily. Diagnostic tests revealed the presence of H1N2 subtype of swine influenza virus (SIV) and Pasteurella multocida from nasal swab and lung emulsion. Serological tests by hemagglutination inhibition method and enzyme-linked immunosorbent assay method (ELISA; imported from USA) indicated the spread of SIV into the pig herds of the affected farm around April 2008. The severe infection and subsequent damage were considered as a result of the combined infection of SIV (H1N2) and bacteria that may have been prevalent in the pig farm. Genetic homology search of sequences for the hemagglutinin (HA) and neuraminidase (NA) genes of A/swine/Tochigi/1/08 showed high homology to Japanese SIVs (H1N2) isolated in the 2000s. Therefore, we considered that Japanese SIV (H1N2) has established an independent stable lineage and participated in infecting pig populations as one of the factors of the pig respiratory disease complex. Consistent surveillance would contribute to clarifying the prevalence of dominant SIVs.

著者

• 米山 州二

  栃木県県央家畜保健衛生所

• KUBO Masanori

  Center for Animal Disease Control and Prevention, National Institute of Animal Health

• YONEYAMA Shuji

  Central Animal Hygiene Service Center of Tochigi Prefecture

• HAYASHI Tsuyoshi

  Research Teams for Zoonotic Diseases, National Institute of Animal Health, National Agriculture and

• KOJIMA Hirokazu

  Central Animal Hygiene Service Center of Tochigi Prefecture

• USAMI Yoshihide

  Central Animal Hygiene Service Center of Tochigi Prefecture

• TAKEMAE Nobuhiro

  Research Teams for Zoonotic Diseases, National Institute of Animal Health, National Agriculture and

• UCHIDA Yuko

  Research Teams for Zoonotic Diseases, National Institute of Animal Health, National Agriculture and

• SAITO Takehiko

  Research Teams for Zoonotic Diseases, National Institute of Animal Health, National Agriculture and

• KUBO Masanori

  Center for Animal Disease Control and Prevention, National Institute of Animal Health, National Agriculture and Food Research Organization (NARO)

関連論文

• Occurrence of a Pig Respiratory Disease Associated with Swine Influenza A (H1N2) Virus in Tochigi Prefecture, Japan
• 栃木県で過去16年間に分離された牛呼吸器病原因菌の薬剤感受性調査
• Antibody Responses Induced by Experimental West Nile Virus Infection with or without Previous Immunization with Inactivated Japanese Encephalitis Vaccine in Horses
• Prevalence of Granulomatous Pleuropneumonia Associated with Actinobacillus pleuropneumoniae Serotype 2 in Slaughter Pigs
• 産業動物臨床・家畜衛生関連部門 栃木県における豚トルクテノウイルスの浸潤状況及び感染動態調査 (日本獣医師会学会学術雑誌)
• 栃木県における豚トルクテノウイルスの浸潤状況及び感染動態調査
• 豚トルクテノウイルスの浸潤状況及び感染動態調査

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