Animals with toxoplasmosis are frequently found dead without previous signs of illness and are often in very good physical condition at death, reflecting the very acute nature of infection. Clinical signs, when observed, are nonspecific and usually consist of lethargy or severe depression. Animals generally die shortly after the observed onset, frequently within minutes or hours, although illness of 1–5 days and weight loss over several months in one zoo have been described (McKissick et al. 1968). The lungs are consistently involved and are usually firm, uniformly dark red, and congested and edematous on section. The trachea frequently contains red-tinged froth. Lymphadenopathy is common with mesenteric lymph nodes often enlarged with hemorrhage and necrosis.
KeywordsFormalin Hepatitis Depression Cage Tuberculosis
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