Avian influenza and Newcastle disease viruses from northern pintail in Japan: Isolation, characterization and inter-annual comparisons during 2006–2008

Jahangir, Alam; Ruenphet, Sakchai; Ueda, Shuhei; Ueno, Yuichi; Shoham, Dany; Shindo, Junji; Okamura, Masashi; Nakamura, Masayuki; Takehara, Kazuhiko

doi:10.1016/j.virusres.2009.02.018

Cited by 37 publications

(37 citation statements)

References 50 publications

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“…Eastern Hokkaido migratory water birds are assumed to fly from their breeding areas mainly via the Kamchatka Peninsula route. Combinations of the HA and NA subtypes, except for the 2 (H3N5 and H11N3) reported here, were coincident with the subtypes reported in the prior studies on Hokkaido, whereas only the H4N6, H6N5, and H6N8 subtypes isolated in this study were reported in San-in and Tohoku districts from 2001 to 2008 [5,7,8]. Interestingly, no H3N8 viruses were isolated in San-in and Tohoku districts during that time; only 2 H3N8 viruses have been isolated in San-in district, in 1981 and 1982 [15], although they have been isolated in Hokkaido more frequently and in surveillance studies by other researchers [10].…”

Section: Discussionsupporting

confidence: 88%

“…No AIV was isolated from the samples collected between January and February 2009 (Table 2). In the prior studies, the prevalence of AIV varies by year or by sampling location [5,7,10]. Our studies are continuing to accumulate epidemiological information on AIV in eastern Hokkaido.…”

Section: Discussionmentioning

confidence: 94%

“…AIV surveillance studies have been conducted in multiple locations in Japan, including the San-in district (western part of Japan) [5,[13][14][15][16]22], Tohoku district (northeastern part of Japan) [7,8], and Hokkaido (northernmost prefecture) [10]. In the previous Hokkaido study, fecal samples from free-flying water birds were collected during 2000-2007 at 2 distinct locations in central Hokkaido (Sapporo) and northern Hokkaido (Wakkanai).…”

Section: Discussionmentioning

confidence: 99%

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Surveillance of Avian Influenza Virus in Migratory Water Birds in Eastern Hokkaido, Japan

Bui

Ogawa

Karibe

et al. 2011

The Journal of Veterinary Medical Science

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ABSTRACT. The epidemiological information has obtained on avian influenza virus (AIV) in eastern Hokkaido, Japan, where AIV surveillance has not been performed. Cloacal or fecal samples obtained from migratory water birds were screened for AIV both by real-time reverse transcriptase polymerase chain reaction to detect the influenza A virus matrix (M) gene and by egg inoculation. Between 2007 and 2009, a total of 2,488 samples were collected from various avian species in Abashiri, Kushiro, Nemuro and Tokachi districts of eastern Hokkaido. AIVs were isolated from 18 of those samples (0.7%). No AIV was isolated from the 1,449 samples collected in Abashiri, Kushiro and Nemuro districts, although 6 were positive for the M gene by RRT-PCR. In contrast, 52 (5.0%) of the 1,039 samples collected from ducks in Tokachi district were M gene positive; AIVs were isolated from 18 of those samples (1.7%). The isolates included H3N5 (1 isolate), H3N6 (1), H3N8 (9), H4N2 (1), H4N6 (2), H6N5 (1), H6N8 (1), and H11N3 (2) subtypes. H3N5 and H11N3 subtypes have not been frequently isolated, and our study is the first to report H3N5 and the second to report H11N3 in Japan. Phylogenetic analysis revealed that the M genes of all isolates belonged to the Eurasian lineage.KEY WORDS: avian influenza virus, eastern Hokkaido, surveillance, Tokachi district, water birds.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

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Surveillance of Avian Influenza Virus in Migratory Water Birds in Eastern Hokkaido, Japan

Bui

Ogawa

Karibe

et al. 2011

The Journal of Veterinary Medical Science

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“…We suggest that the NA and NS segments of A/mallard/Poland/16/09 and A/ mallard/Poland/446/09 detected in mallards at the same sampling site 1 year apart were derived from AIV precursor strain(s) that persisted in the Gdansk area for a long period of time and emerged in January 2009 and then in December 2009. Interestingly, Jahangir et al (2009) found a high isolation rate of AIV H7N7 in northern pintails (Anas acuta) in wintering season 2007/ 08 in Japan, and similarly to our studies, on one occasion the virus was detected twice at one site, 2 months apart. A phylogenetic study of H7 and N7 genes revealed that these isolates were very similar or virtually identical (Jahangir et al, 2010).However, the high frequency of H7N7 isolation in that region was noted exclusively in one wintering season as opposed to our study in which we demonstrated the presence of AIV with genetically related genes between two consecutive winter seasons in the same area.…”

Section: Discussionsupporting

confidence: 91%

Evidence of persistence and multiple genetic modifications of H7N7 low-pathogenic avian influenza virus in wild mallards in Poland provided by phylogenetic studies

Śmietanka¹,

Pikuła²,

Minta³

et al. 2011

Avian Pathology

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“…5,11 Newcastle disease virus (order Mononegavirales, family Paramyxoviridae, subfamily Paramyxovirinae, genus Avulavirus) is a single-strand, negativesense, nonsegmented RNA virus. 22 On the basis of pathogenicity, strains of NDV are divided into lentogenic (low virulence), mesogenic (medium virulence), and velogenic (high virulence).…”

mentioning

confidence: 99%

Selective Isolation of Avian Influenza Virus (AIV) from Cloacal Samples Containing AIV and Newcastle Disease Virus

et al. 2011

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Abstract. Avian influenza viruses (AIVs) are important zoonotic pathogens whose natural reservoir is waterfowl. In addition to AIV, waterfowl are often coinfected with other viruses, such as the paramyxoviruses, of which Newcastle disease virus (NDV) is of particular importance because of the highly virulent nature of certain strains of this virus for domestic poultry. In routine surveillance of waterfowl for AIV, a number of cloacal samples were encountered that were positive for AIV by real-time reverse transcription polymerase chain reaction (RT-PCR), but did not yield AIV by inoculation in embryonated chicken eggs. On further testing, these samples were also positive for NDV by conventional RT-PCR. It was hypothesized that if both NDV and AIV are present in a sample, the former may overgrow AIV yielding false-negative AIV results. Such samples were treated with chicken anti-NDV polyclonal antiserum and then inoculated in embryonated chicken eggs. Several samples were found to be positive for different subtypes of AIV, indicating that, in the presence of mixed infection with NDV and AIV, it is imperative to remove the influence of NDV, so a true picture of AIV prevalence emerges. An additional benefit is that information on the circulation of NDV in these birds sheds light on their epidemiologic and ecologic significance.

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Avian influenza and Newcastle disease viruses from northern pintail in Japan: Isolation, characterization and inter-annual comparisons during 2006–2008

Cited by 37 publications

References 50 publications

Surveillance of Avian Influenza Virus in Migratory Water Birds in Eastern Hokkaido, Japan

Surveillance of Avian Influenza Virus in Migratory Water Birds in Eastern Hokkaido, Japan

Evidence of persistence and multiple genetic modifications of H7N7 low-pathogenic avian influenza virus in wild mallards in Poland provided by phylogenetic studies

Selective Isolation of Avian Influenza Virus (AIV) from Cloacal Samples Containing AIV and Newcastle Disease Virus

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