Isolation of an influenza H1N1 virus from a pig

Nerome, Kuniaki; Ishida, Masatoshi; Oya, Akira; Kanai, C.; Kupradinunt, Suwicha

doi:10.1016/0042-6822(82)90486-x

Cited by 31 publications

(15 citation statements)

References 16 publications

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“…There have been only a few reports on the occurrence of human HINI strains of influenza virus among swine populations, in contrast to those of human H3N2 strains (Alexander, 1982;Nerome et al 1982). In the present study antibody to human HINI virus was not found during the period 1978-83, although HiN1 526 H. GOTO AND OTHERS strains were prevalent (with other virus strains) in the human epidemics which occurred both in 1980 and 1981.…”

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confidence: 51%

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: 51%

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

et al. 1988

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“…The pigs were infected with human H1N1 or H3N2 virus during the human epidemics of each virus (Miwa & Goto, 1986). Evidence for the spread of Russian (H1N1) influenza viruses from humans to pigs has been described in a few countries (Alexander, 1982;Shortridge & Stuart-Harris, 1982), and there is one report of the isolation of Russian (H 1N 1) influenza virus from a pig in Thailand (Nerome et al, 1982) following the reappearance of H1N1 influenza virus in 1977. This communication describes the antigenic and genetic characterization of H1N1 viruses isolated from pigs in Japan.…”

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confidence: 99%

“…After incubation of the eggs at 35 °C for 3 days, the amniotic and allantoic fluids were harvested and tested for haemagglutinating activity with 0.5% chicken erythrocytes. Haemagglutination-inhibition (HI) (Miwa & Goto, 1986) and neuraminidaseinhibition (NI) (Nerome et al, 1982) tests were used for the identification of isolated strains using antisera to four reference type A viruses (Table 1). The nucleotide sequences of the HA gene coding for the HA1 domain and the NA gene of the isolate sw/Obihiro/5/92 were determined as described previously (Zimmern & Kaesberg, 1978), and phylogenetic trees for the HA and NA genes were constructed based on total nucleotide sequences by the neighbour-joining method (Saitou & Nei, 1987).…”

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confidence: 99%

Antigenic and genetic characteristics of H1N1 human influenza virus isolated from pigs in Japan

Katsuda

Sato

Shirahata

et al. 1995

Journal of General Virology

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Two strains of influenza A virus were isolated from pigs in northern Japan in 1992. Serological tests showed that the haemagglutinin (HA) and neuraminidase (NA) antigens were more closely related to those of recent human H1N1 viruses than to those of swine HIN1 viruses. The HA and NA genes of isolate A/sw/Obihiro/ 5/92 were shown to be closely related to those of current human H1N1 viruses. Evolutionary trees constructed from nucleotide sequences showed that the HA and NA genes of A/sw/Obihiro/5/92 were apparently on a branch cluster containing human strains isolated between 1990 and 1992.

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“…However, infection of pigs with human H1N1 strains does not usually produce signs of disease (Shope & Francis, 1936;Nerome et al, 1982;Hannoun & Gorreau, 1980). The haemagglutinin genes of sw38 and sw39 (Neumeier & Meier-Ewert, 1992) as welt as the NP gene of sw39 (Gorman et al, 1991) have been shown previously to be closely related to the early human H1N1 strains wsn33 and pr834 by nucleotide sequence analysis.…”

confidence: 99%

“…The demonstration of antibodies to human H1N1 viruses in swine sera (Shope, 1938;Arikawa et al, 1979;Tfmov~i et al, 1980Tfmov~i et al, , 1985Nerome et al, 1982;Shortridge & Stuart-Harris, 1982;Zhang et al, 1988, Short communication 1989 and sporadic isolates (Nerome et al, 1982;Hannoun & Gorreau, 1980) indicate that transmission of human H1N1 viruses from humans to pigs occurs readily in nature. However, infection of pigs with human H1N1 strains does not usually produce signs of disease (Shope & Francis, 1936;Nerome et al, 1982;Hannoun & Gorreau, 1980).…”

confidence: 99%

Genetic relatedness between influenza A (H1N1) viruses isolated from humans and pigs

Neumeier

Meier-Ewert

Cox

1994

Journal of General Virology

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Isolation of an influenza H1N1 virus from a pig

Cited by 31 publications

References 16 publications

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

Antigenic and genetic characteristics of H1N1 human influenza virus isolated from pigs in Japan

Genetic relatedness between influenza A (H1N1) viruses isolated from humans and pigs

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