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  1. 農学部
  1. 農学部
  2. 学術雑誌掲載論文 (農学部)

Evaluation of bovine leukaemia virus infection control measures in Japanese Black beef cattle breeding farms: A 7-year longitudinal study based on proviral load

http://hdl.handle.net/10458/0002002375
http://hdl.handle.net/10458/0002002375
de10480b-1901-40d8-a20a-4cc2b6e5d331
名前 / ファイル ライセンス アクション
Veterinary Fulltext (709 KB)
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アイテムタイプ 学術雑誌論文 / Journal Article(1)
公開日 2026-03-09
タイトル
タイトル Evaluation of bovine leukaemia virus infection control measures in Japanese Black beef cattle breeding farms: A 7-year longitudinal study based on proviral load
言語 en
言語
言語 eng
キーワード
言語 en
キーワード Japanese Black beef breeding cattle
キーワード
言語 en
キーワード barn layout
キーワード
言語 en
キーワード bovine leukaemia virus
キーワード
言語 en
キーワード proviral load
キーワード
言語 en
キーワード real-time polymerase chain reaction
資源タイプ
資源タイプ journal article
アクセス権
アクセス権 open access
著者 Kajisa, Makoto

× Kajisa, Makoto

en Kajisa, Makoto(Personal)
M&Y Animal Service

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Tani, Chikako

× Tani, Chikako

en Tani, Chikako(Personal)
Kagoshima University

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Tani, Mineto

× Tani, Mineto

en Tani, Mineto(Personal)
Kagoshima University

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Li, Jiazhou

× Li, Jiazhou

en Li, Jiazhou(Personal)
Kagoshima University

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Ito, Satoshi

× Ito, Satoshi

en Ito, Satoshi(Personal)
Kagoshima University

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Yamauchi, Takenori

× Yamauchi, Takenori

en Yamauchi, Takenori(Personal)
Showa University

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Murakami, Hironobu

× Murakami, Hironobu

en Murakami, Hironobu(Personal)
Azabu University

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Katamoto, Hiromu

× Katamoto, Hiromu

en Katamoto, Hiromu(Personal)
Kyushu University

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佐藤, 礼一郎

× 佐藤, 礼一郎

WEKO 35200
e-Rad_Researcher 00582826

ja 佐藤, 礼一郎
宮崎大学

ja-Kana サトウ, レイイチロウ

en Sato, Reiichiro
University of Miyazaki

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Nakahata, Shingo

× Nakahata, Shingo

en Nakahata, Shingo(Personal)
Kagoshima University

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抄録
内容記述タイプ Abstract
内容記述 Background
Bovine leukaemia virus (BLV) infection remains a major problem for Japanese Black (Wagyu) cattle, and effective and sustainable control measures are essential to prevent its spread in breeding herds. This study aimed to monitor the BLV infection status of all cattle at a Japanese Black breeding farm in Kagoshima Prefecture, Japan, over 7 years.

Methods
BLV serological testing was conducted at baseline in 2018 (Y0, study year 0), followed by real-time polymerase chain reaction (PCR) testing in six survey years between 2019 and 2024 (Y1‒Y6; no testing in 2023). The infection status and proviral load (PVL) were assessed. Cattle were classified as calves (<10 months) or breeding cattle (≥10 months), reflecting standard Japanese production practices. After high-PVL cattle were identified in Y1, new barns were constructed stepwise from Y2 onwards to physically separate BLV-positive and BLV-negative animals. In addition, strategic culling of BLV-positive cattle, BLV screening of introduced cattle, and early separation of calves from their dams were implemented.

Results
At Y0, BLV seroprevalence among breeding cattle was 78.6%. At Y1, PCR detected BLV in 28.0% of calves and 74.1% of breeding cattle. By Y6, BLV prevalence had significantly decreased to 39.2% in breeding cattle compared with Y1, while it was 21.6% in calves, with no significant reduction observed.

Conclusions
Early identification of high-PVL cattle, physical separation of BLV-positive and BLV-negative cattle, and culling of BLV-positive cattle was effective in reducing BLV prevalence in a Wagyu breeding herd. These findings propose a feasible, farm-based approach for managing endemic BLV under commercial conditions.
言語 en
書誌情報 en : Veterinary record open

巻 13, 号 1, p. e70029, 発行日 2026-06
出版者
出版者 Wiley
言語 en
ISSN
収録物識別子タイプ PISSN
収録物識別子 20526113
ISSN
収録物識別子タイプ EISSN
収録物識別子 20526113
ISSN
収録物識別子タイプ ISSN
収録物識別子 23992050
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1002/vro2.70029
権利
権利情報 © 2026 The Author(s).
言語 en
著者版フラグ
出版タイプ VoR
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