作者: Didier Lefay , Muriel Naciri , Pierre Poirier , René Chermette
DOI: 10.1016/S0304-4017(99)00230-7
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摘要: Two multicentre surveys were conducted in France to estimate the prevalence of Cryptosporidium infection calves using qualitative ELISA for detection coproantigens and oocysts. The first survey involved 4-12-day-old six dairy-calf distribution centres, collecting from seven Administrative Regions (Aquitaine, Bretagne, Franche-Comte, Lorraine, Normandie, Nord, Pays de Loire). For each region, 20 selected every month 12 consecutive months (October 1995-September 1996). Prevalence was 17.9% (Confidence Intervals (C.I.) 95%=[16.1%; 19.8%]) among 1628 calves, which only 5.3% had diarrhoea. second between November 1995 May 1996 4-21-day-old examined by veterinary practitioners who 189 livestock farms dairy- or suckler-type ten Departments (Allier, Cantal, Creuse, Doubs, Ille-et-Vilaine, Maine-et-Loire, Manche, Pas-de-Calais, Saone-et-Loire, Vendee). Cryptosporidia detected 105 (55.6%) farms. Among 440 examined, 398 (90.5%) presented diarrhoea, cryptosporidia found 191 animals, i.e. a 43.4% (C.I. 95%=[38. 8%; 48.0%]). Breed type housing very little impact on this survey. Some regional variations could be noticed, even if is widespread. Monthly related seasonal peaks calving with lower rate during summer.