THE EFFECT OF BOVINE VIRUS DIARRHEA VIRUS-INFECTION ON CONCEPTION RATE
THE EFFECT OF BOVINE VIRUS DIARRHEA VIRUS-INFECTION ON CONCEPTION RATE
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DOI：
10.1016/0167-5877(93)90107-5
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发表时间：
1993-02-01
影响因子：
2.6
通讯作者：
MEYLING, A
中科院分区：
文献类型：
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作者：
HOUE, H;PEDERSEN, KM;MEYLING, A
在五个持续感染 BVDV 的奶牛群中研究了牛病毒性腹泻病毒 (BVDV) 对受孕率的可能影响。在每个牛群中，风险期被定义为最大的持续感染动物 6 个月大之前的时期（从 1986 年 1 月开始）。后风险期被定义为此后的时期（截至 1988 年 12 月）。假设抗体携带者的患病率在风险期开始时较低；每个牛群的后风险期血清阳性率均为中等到高。在所有牛群中，后风险期的受孕率高于风险期（5 个个体牛群中的 4 个 P < 0.10）。风险期受孕率的增幅为 16% 至 64%。 Mantel-Haenszel chi2 检验的总体显着性为 P < 0.001。因此，强烈表明风险期内传播的 BVDV 感染导致奶牛群受胎率暂时下降。
The possible influence of bovine virus diarrhoea virus (BVDV) on conception rate was studied in five dairy herds in which animals persistently infected with BVDV were found. In each herd a risk period was defined as the period (starting January 1986) before the oldest of the persistently infected animals was 6 months old. The post-risk period was defined as the period thereafter (ending December 1988).The prevalence of antibody carriers was assumed to be low at the beginning of the risk period; seroprevalences were moderate to high in the post-risk period in each herd.In all herds, conception rate was higher (four of five individual-herd P < 0.10) in the post-risk period than in the risk period. The increase ranged from 16 to 64% of the conception rate in the risk period. The overall significance of the Mantel-Haenszel chi2 test was P < 0.001. Thus, it was strongly suggested that the BVDV infection circulating during the risk period had caused a temporary decrease of the conception rate in the dairy herds.