Lewis B D, Penzhorn B L, Lopez-Rebollar L M, De Waal D T
Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.
Vet Parasitol. 1996 May;63(1-2):9-16. doi: 10.1016/0304-4017(95)00881-0.
A South African strain of Babesia canis parasites was isolated and shown to be vector-specific to only one of the two vectors in the region, Haemaphysalis leachi. This tick was found to transmit the parasite in its adult instar. When infected as larvae, the ticks would not transmit in the proceeding nymphal instar. The vector-specific strain was named the 'Thomas strain' after one of the dogs involved in isolating it. A survey revealed a prevalence of > 50% of this strain in four widely separated areas of the country. Rhipicephalus sanguineus, which transmits B. canis vogeli elsewhere, has not been shown to be a vector of the South African strain of B. canis.
一株南非犬巴贝斯虫寄生虫被分离出来，结果表明它仅对该地区两种媒介之一的李氏血蜱具有媒介特异性。发现这种蜱在其成虫期传播该寄生虫。若幼虫期感染，蜱在随后的若虫期不会传播。这种具有媒介特异性的菌株以参与分离工作的一只狗的名字命名为“托马斯菌株”。一项调查显示，在该国四个相距甚远的地区，该菌株的流行率超过50%。在其他地方传播犬伏格特巴贝斯虫的血红扇头蜱尚未被证明是南非犬巴贝斯虫菌株的媒介。
