An Outbreak of Influenza in the Swine With Hong Kong Influenza Virus

Sugimura, Takaaki; Kataoka, Toshiaki; Kita, Eisuke; Nishino, Kyuichi; Sasahara, J

doi:10.2222/jsv.25.19

Cited by 8 publications

(7 citation statements)

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“…Further outbreaks of swine influenza and a high prevalence of antibody to the virus in Japanese swine populations have been reported by several workers (Yamane, Sukeno & Ishida, 1978;Sugimura et al 1981;Ogawa et al 1983). An outbreak of influenza virus infection due to an H3N2 strain was previously seen in a herd of swine in Osaka, Japan (Sugimura et al 1975). Later the co-existence of swine (HINl) and human (H3N2) influenza viruses was confirmed by serological and virological studies on Japanese swine populations (Onta et al 1978;Sugimura et al 1980;Arikawa et al 1982).…”

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confidence: 88%

Antibody responses of swine to type A influenza viruses during the past ten years in Japan

et al. 1988

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SummaryA total of 6346 swine sera collected at an abattoir in the city of Obihiro, Hokkaido during the years 1978–87 were tested for the presence of antibodies to swine and human influenza viruses. A high incidence of antibody to A/New Jersey/8/76 (swine type H1N1) virus was observed throughout the 10 years except for the occasional month and a single long period of 15 months. Antibodies to human H3N2 virus in swine appeared to be related to the epidemics of human influenza which occurred in the study area during the years 1980–3, but unrelated to the epidemics during the years 1984–7. A large number of swine were found to be antibody positive to a human H1N1 virus during the period April to June 1964, and a smaller number, during the period November 1986 to June 1987. Both were in relation to human influenza epidemics. However, there were long periods where human H1N1 antibodies in swine could not be found.The first occurrence of swine influenza in Japan was recognized in 1977, when it was presumed that the disease was introduced via imported swine (Shibata elal. 1978). Further outbreaks of swine influenza and a high prevalence of antibody to the virus in Japanese swine populations have been reported by several workers (Yamane, Sukeno & Ishida, 1978; Sugimura elal. 1981; Ogawa elal. 1983). An outbreak of influenza virus infection due to an H3N2 strain was previously seen in a herd of swine in Osaka, Japan (Sugimura etal. 1975). Later the co-existence of swine (H1N1) and human (H3N2) influenza viruses was confirmed by serological and virological studies on Japanese swine populations (Onta et al. 1978; Sugimura et al. 1980; Arikawa et al. 1982). In a previous report (Miwa et al. 1986), we suggested that the swine became infected with a human H1N1 virus as piglets during an epidemic of influenza which occurred in the human population at the same time. The present study was undertaken to evaluate the changes in the prevalence of antibodies against swine and human influenza viruses in Japanese swine during the past 10 years.

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confidence: 88%

Antibody responses of swine to type A influenza viruses during the past ten years in Japan

et al. 1988

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“…There have been some reports that the Hong Kong influenza viruses isolated from pigs were indistinguishable by serological methods from human-origin viruses, suggesting the direct transmission of the virus from humans to pigs (Kundin 1970;Sugimura et al 1975). In addition, it was reported in the USA that immunologically and genetically identical HswlNl viruses were isolated from both pigs and employees in the same farm in Wisconsin (Morbidity and Mortality Weekly Report 1977).…”

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confidence: 99%

The follow-up study of swine and Hong Kong influenza virus infection among Japanese hogs.

Arikawa

Yamane

Totsukawa

et al. 1982

Tohoku J. Exp. Med.

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“…The following strains of influenza virus were used: A/swine/ Iowa/15/30(HINl) (10), A/swine/Shizuoka/l/78(HINl) (14), A/swine/Niigata/l/78 (HINl) (14), A/swine/Kyoto/3/79(HINl) (isolated from a nasal swab from a pig and identified by the authors), A/swine/Kanagawa/l/78(HIN2) (15), and A/ swine/Wadayama/5/68(H3N2) (13). All of these HI strains had previously been subtyped as Hswl.…”

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confidence: 99%

“…Since the first isolation of H3N2 virus from diseased swine with typical signs of influenza in 1969 (13), significant numbers of swine sera positive for antibodies against Hong Kong influenza virus have been detected in some serological surveys (4,5,16,19). Swine influenza virus was first isolated in 1977 (9), and before that the existence of this virus had not been recognized serologically in the swine population in this country (4,7,9,14,21).…”

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Further Isolation of a Recombinant Virus (H1N2, Formerly Hsw1N2) from a Pig in Japan in 1980

Yasuhara

Hirahara

Nakai

et al. 1983

Microbiology and Immunology

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In September 1980, an outbreak of febrile respiratory disease was observed in a herd of sows (1‐2 years of age) in Ehime Prefecture, Japan. Most of the swine showed clinical signs of disease such as depression, anorexia, fever, nasal discharge, and cough. A hemagglutinating agent was isolated from a nasal swab from one of the diseased pigs. By cross‐hemagglutination‐inhibition and neuraminidase‐inhibition tests with antisera to influenza viruses of swine origin, the isolate was identified as an influenza A virus of the H1N2 (former designation, Hsw1N2) subtype, and designated A/swine/Ehime/1/80 (H1N2). Significant antibody rises against the surface antigens of the isolate were found in convalescent swine sera. The distribution of antibody against H1N2 virus in swine sera in Ehime Prefecture was examined. Seven (8%) of 93 sera collected after the outbreak (in 1981) showed antibodies to only H1 and N2 antigens but none of the sera before the outbreak contained such antibodies, indicating that H1N2 virus had been restrictedly prevalent among swine but was not wide‐spread until 1981.

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An Outbreak of Influenza in the Swine With Hong Kong Influenza Virus

Cited by 8 publications

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Antibody responses of swine to type A influenza viruses during the past ten years in Japan

Antibody responses of swine to type A influenza viruses during the past ten years in Japan

The follow-up study of swine and Hong Kong influenza virus infection among Japanese hogs.

Further Isolation of a Recombinant Virus (H1N2, Formerly Hsw1N2) from a Pig in Japan in 1980

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