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Toxoplasmosis is caused by ''[[Toxoplasma gondii]]'' infection. Its life cycle is described in the pathogen page, ''[[Toxoplasma gondii]]''.

Toxoplasmosis is caused by ''[[Toxoplasma gondii]]'' infection. Its life cycle is described in the pathogen page, ''[[Toxoplasma gondii]]''.

The outcome of primary infection depends on the immune status of the host, as well as the location of and degree of injury caused by tissue cysts. Primary infection normally results in chronic disease, where tissue cysts form but clinical signs are not normally apparent. In immunodeficient animals, or in animals with concurrent illness, chronic infections may become symptomatic as the organism is allowed to proliferate. Acute primary infection in these animals can, rarely, prove fatal.  

The outcome of primary infection depends on the immune status of the host, as well as the location of and degree of injury caused by tissue cysts. Primary infection normally results in chronic disease, where tissue cysts form but clinical signs are not normally apparent. In immunodeficient animals, or in animals with concurrent illness, chronic infections may become symptomatic as the organism is allowed to proliferate. Acute primary infection in these animals can, rarely, prove fatal.