Beverley J K, Henry L, Hunter D, Brown M E
Res Vet Sci. 1977 Jul;23(1):33-7.
Nine calves were inoculated with tissue cysts of a low virulence strain of Toxoplasma gondii and killed at intervals up to 10 weeks. An immunological response took the form of circulating antibodies and reactive changes in the lymph nodes. The organism could only be recovered from the lymph nodes and this only during the first four weeks after infection. No tissue cysts were demonstrated and only a few inflammatory lesions occurred. Thus, although calves can be infected, the immunological response is prompt with rapid elimination of the organism.
九只小牛接种了低毒力弓形虫株的组织包囊，并在长达10周的时间内定期宰杀。免疫反应表现为循环抗体和淋巴结的反应性变化。该生物体仅在感染后的头四周内可从淋巴结中分离出来，未发现组织包囊，仅出现了少数炎症病变。因此，尽管小牛可以被感染，但免疫反应迅速，能快速清除该生物体。
