ANSES, Laboratoire de Ploufragan-Plouzané, Site de Ploufragan, 22440 Ploufragan, France.
Vet Parasitol. 2012 Jun 8;187(1-2):333-6. doi: 10.1016/j.vetpar.2011.12.009. Epub 2011 Dec 19.
Eimeria praecox and Eimeria acervulina are two species of coccidia parasites infecting chickens, which develop in the duodenum. The purpose of this study was to evaluate the pathogenicity of E. praecox and to study interactions of this coccidium with E. acervulina. The results showed that the pathogenicity of E. praecox was related to the infective dose, and that its impact on individual weight and weight gain was significant from the lowest administered dose: 5000 oocysts per bird. No morbidity was observed, even with the highest infective dose, but faecal consistency alteration was higher with increasing infective doses. No consistent lesion was observed. When E. praecox was associated with E. acervulina with a low infective dose, performance deterioration seemed to be an additional effect of the two species. However, in the case of heavy infections, signs worsened along with duration of negative impact on growth, compared to a mono-infection.
柔嫩艾美耳球虫和堆型艾美耳球虫是两种感染鸡的球虫寄生虫，在十二指肠中发育。本研究的目的是评估柔嫩艾美耳球虫的致病性，并研究该球虫与堆型艾美耳球虫的相互作用。结果表明，柔嫩艾美耳球虫的致病性与感染剂量有关，从最低给药剂量 5000 个卵囊/只鸡开始，对个体体重和体重增加的影响显著。即使给予最高感染剂量，也未观察到发病率，但随着感染剂量的增加，粪便稠度的改变更高。没有观察到一致的病变。当柔嫩艾美耳球虫与低感染剂量的堆型艾美耳球虫混合感染时，性能恶化似乎是两种球虫的附加作用。然而，在严重感染的情况下，与单一感染相比，随着对生长的负面影响持续时间的延长，症状恶化。
