Samish M, Pipano E, Hadani A
Division of Parasitology, Kimron Veterinary Institute, Beit-Dagan, Israel.
Am J Vet Res. 1993 Mar;54(3):411-4.
The 1-host tick Boophilus annulatus was found to transmit anaplasmosis in cattle transstadially. Anaplasma marginale was invariably transmitted when ticks that had been pulled off Anaplasma-infected calves either after 7 days (as fully engorged larvae) or after 14 to 15 days (as fully engorged nymphs) were transferred within 4 days to susceptible calves. Three morphologically different A marginale isolates, 1 round (tailless) and 2 with different types of appendages (tailed) were transmitted by the ticks. These findings might explain the overlap of the geographic distribution of the disease and that of Boophilus spp in some areas of the world.
单宿主蜱环形牛蜱被发现可经变态期传播牛的无形体病。当在7天（作为饱血幼虫）或14至15天（作为饱血若虫）后从感染无形体的犊牛身上摘下的蜱在4天内转移到易感犊牛身上时，边缘无形体总是会被传播。蜱传播了三种形态不同的边缘无形体分离株，1种圆形（无尾）和2种具有不同类型附属物（有尾）的分离株。这些发现可能解释了该疾病与世界某些地区环形牛蜱属的地理分布重叠现象。
