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Isolation of 4/91 type of infectious bronchitis virus as a new variant in Japan and efficacy of vaccination against 4/91 type field isolate.

Avian diseases - 1 Dec 2008

Shimazaki Yohko, Horiuchi Takashi, Harada Makiko, Tanimura Chieko, Seki Yoshihisa, Kuroda Yorifumi, Yagyu Kazuhiro, Nakamura Shigeyuki, Suzuki Shoko

Abstract excerpt

Among field isolates of infectious bronchitis virus (IBV) from recent outbreaks, some isolates that were classified into the 4/91 genotype, by analysis of the S1 gene, have been confirmed to be a new variant in Japan. To elucidate the characteristics of these isolates, pathogenicity in chicks and the efficacy of vaccines against this new variant were examined. Severe respiratory symptoms were observed in...

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PMID: 19166052
DOI: 10.1637/8359-051408-Reg.1

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-07.1.

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