Waldeland H
Acta Vet Scand. 1977;18(1):91-7. doi: 10.1186/BF03548469.
The epidemiology of toxoplasmosis was studied in 51 flocks with reproductive loss from the infection. Overt toxoplasmosis was diagnosed on 2–4 neighbouring farms on 6 occasions, involving a total of 15 flocks. In 14 of the 51 flocks the frequency of abortion was highest in a definite part or age group of the flock. Evidence was found that the source of infection may be confined to a particular part of an area or of a farm. There was apparently no transmission of Toxoplasma gondii from sheep with overt or latent toxoplasmosis to susceptible sheep. There were good reasons to believe that the parasite might have been transmitted via the silage in 1 of the flocks.
对51个因感染弓形虫病而出现繁殖损失的羊群进行了弓形虫病流行病学研究。在6次事件中，2至4个相邻农场诊断出明显的弓形虫病，涉及总共15个羊群。在51个羊群中的14个羊群中，流产频率在羊群的特定部分或年龄组中最高。有证据表明，感染源可能局限于一个地区或一个农场的特定部分。显然，显性或隐性弓形虫病的绵羊没有将弓形虫传播给易感绵羊。有充分理由相信，该寄生虫可能通过其中一个羊群的青贮饲料传播。
