Ghirotti M, Iliamupu D S
FAO-DANIDA Project, Studies on the Economics of Ticks in Zambia, Lusaka.
Parassitologia. 1989 Aug-Dec;31(2-3):231-7.
Sanga cattle from Central Zambia were examined during the dry and the rainy seasons for the presence of the adult stage of eyeworm Thelazia rhodesii. Prevalences were recorded according to age/sex groups. The occurrence of ocular diseases was also noted. Differences between the total prevalences of infection with the parasite in the dry and rainy seasons were observed: respectively 3.1% and 26.6% of all cattle examined (p less than 0.001), which numbered 223 head in the dry season and 248 in the rainy season. In both seasons, adult males showed the highest prevalence and calves the lowest. In the dry season the parasite was found in two of the 23 males (8.7%) but in none of the 24 calves. During the rains, eight of the 22 adult males (36.4%), and two of 53 calves (3.8%) were parasitized (p less than 0.001). A comparison of the prevalences in the latter season between a group of cows sprayed weekly with a synthetic pyrethroid and an untreated group showed no significant difference between the two groups (p greater than 0.1). No correlation was found between T. rhodesii infection and the occurrence of eye lesions (p greater than 0.1). It is concluded that in traditionally managed Zambian cattle the infection is seasonal, is more frequent in adult male animals and is not associated with eye infections (i.e., pink-eye).
在旱季和雨季对赞比亚中部的桑加牛进行检查，以确定是否存在罗德西眼虫（Thelazia rhodesii）的成虫阶段。根据年龄/性别组记录患病率。还记录了眼部疾病的发生情况。观察到旱季和雨季寄生虫感染总患病率之间的差异：在所有检查的牛中，旱季患病率为3.1%，雨季为26.6%（p小于0.001），旱季检查了223头牛，雨季检查了248头牛。在两个季节中，成年雄性患病率最高，犊牛最低。旱季在23头雄性中有2头（8.7%）发现寄生虫，但24头犊牛中无一感染。雨季时，22头成年雄性中有8头（36.4%）和53头犊牛中有2头（3.8%）被寄生（p小于0.001）。比较后一个季节中一组每周用合成拟除虫菊酯喷洒的母牛和未处理组的患病率，两组之间无显著差异（p大于0.1）。未发现罗德西眼虫感染与眼部病变之间存在相关性（p大于0.1）。得出的结论是，在赞比亚传统管理的牛群中，感染具有季节性，成年雄性动物中更常见，且与眼部感染（即红眼病）无关。
