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首页> 外文期刊>Tropical Animal Health and Production >Epidemiology of Oestrus ovis infection of sheep in northeast Spain (mid-Ebro Valley)
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Epidemiology of Oestrus ovis infection of sheep in northeast Spain (mid-Ebro Valley)

机译：西班牙东北部（埃布罗河谷中部）绵羊绵羊发情的流行病学

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Slaughterhouse surveys to determine the prevalence and intensity of larval Oestrus ovis Linnaeus (Diptera: Oestridae) in sheep, were conducted monthly for 1year in northeastern Spain. The prevalence of O. ovis in 120 sheep in northeast Spain was 84.2%. The monthly prevalence ranged from 62.5% in January to 100% in June and October. Of the 3,831 larvae collected, 3,005 were first instar larvae (78.4%), 744 second instar larvae (19.4%), and 82 third instar larvae (2.1%). The mean larval burden per infected sheep was 37.9, throughout the year although infection was higher in October. The high number of first stage larvae in winter (especially October, November, and December) may be due to a period of slower larval maturation. Third-stage larvae were always present but sometimes in very low numbers compared to the total. According to the results, oestrosis appears to be a serious problem in the region.
机译：屠宰场调查在西班牙东北部进行，为期一年，每月进行一次调查，以确定绵羊中的发情期和强度（羊栖菜：Oestridae）。西班牙东北部120只绵羊中O. ovis的患病率为84.2％。月患病率从1月的62.5％到6月和10月的100％不等。在收集的3,831个幼虫中，有3,005个是第一龄幼虫（78.4％），744个第二龄幼虫（19.4％）和82个第三龄幼虫（2.1％）。全年平均每只被感染绵羊的幼虫负担为37.9，尽管十月份的感染率更高。冬季（尤其是10月，11月和12月）的第一阶段幼虫数量较高，可能是由于幼虫成熟时期较慢所致。第三阶段的幼虫总是存在，但与总数相比有时很少。根据结果​​，雌激素似乎是该地区的一个严重问题。

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