Primate Toxoplasmosis Study Guide

Overview and Clinical Importance

Toxoplasmosis is a potentially fatal multisystemic protozoal disease caused by Toxoplasma gondii. This disease is of critical importance in captive primate management and represents a high-yield topic for the NAVLE exam. New World primates (NWP) are exceptionally susceptible to fulminant toxoplasmosis, with mortality rates approaching 100 percent in some species if untreated, while Old World primates (OWP) are relatively resistant to clinical disease.

Toxoplasmosis is one of the most common causes of death in captive New World primates and can present as sudden death without premonitory signs or as acute multisystemic disease. Understanding the epidemiology, clinical presentation, and management of this disease is essential for veterinary practitioners working with exotic species.

Etiology and Life Cycle

The Causative Agent

Toxoplasma gondii is an obligate intracellular protozoan parasite belonging to the phylum Apicomplexa. It is one of the most successful parasites worldwide, capable of infecting virtually all warm-blooded animals including birds and mammals. The parasite has a complex life cycle involving both sexual and asexual reproduction.