Costa A J, Araujo F G, Costa J O, Lima J D, Nascimento E
J Parasitol. 1977 Apr;63(2):212-8.
Calves aged 3 months were readily infected with oocysts and cysts of Toxoplasma gondii administered by oral route. Fever, respiratory distress, nasal discharge and hyperemia of the conjunctivas were the most significant clinical signs noted in the infected animals. Parasitemia was demonstrated in all infected calves. It occurred on different days and up to 62 days after the infection. Toxoplasma was demonstrated in tissues of all infected calves, and the organ most frequently parasitized was the lymph node. Parasitism of the retina was demonstrated in two calves. All infected animals had antibody against T. gondii in their serum. The Sabin-Feldman dye test and the indirect immunofluorescent test were both useful in detecting antitoxoplasma antibody.
3月龄犊牛经口感染刚地弓形虫的卵囊和包囊后易被感染。发热、呼吸窘迫、鼻液和结膜充血是感染动物中最显著的临床症状。所有感染犊牛均出现寄生虫血症。寄生虫血症在感染后的不同天数出现，最长可达62天。在所有感染犊牛的组织中均检测到弓形虫，最常被寄生的器官是淋巴结。在两头犊牛中检测到视网膜寄生。所有感染动物血清中均有抗弓形虫抗体。Sabin - Feldman染色试验和间接免疫荧光试验在检测抗弓形虫抗体方面均有用。
