Smith R D, Miranpuri G S, Adams J H, Ahrens E H
Am J Vet Res. 1985 Jun;46(6):1396-8.
The bovine spirochete, Borrelia theileri, was detected in Giemsastained blood smears from a splenectomized calf 17 days after exposure to a laboratory colony of the tropical cattle tick, Boophilus microplus. Spirochetes were detected in the hemolymph and ovary of all engorged female ticks examined, indicating a high infection rate in this tick colony. Spirochetes were detected in a 2nd splenectomized calf 15 days after exposure to the larval offspring of ticks from the 1st calf. The only observable effect of infection in the 2 calves was a maximum rectal temperature increase to 40.2 C, which coincided with the first detectable parasitemia. The tick colony did not have any adverse effects, despite extensive multiplication of spirochetes in their tissues.
在一头脾切除的小牛接触热带牛蜱微小牛蜱的实验室群体17天后，通过吉姆萨染色的血涂片检测到牛螺旋体——泰勒氏疏螺旋体。在所有检查的饱血雌蜱的血淋巴和卵巢中都检测到了螺旋体，表明该蜱群体的感染率很高。在第二头脾切除的小牛接触第一头小牛蜱的幼虫后代15天后，检测到了螺旋体。这两头小牛感染后唯一可观察到的影响是直肠温度最高升至40.2摄氏度，这与首次检测到的寄生虫血症同时出现。尽管螺旋体在蜱的组织中大量繁殖，但蜱群体并未产生任何不良影响。
