Toxoplasmosis in HIV/AIDS patients in Shiraz, southern Iran

Background: Toxoplasma gondii is an intracellular protozoan parasite, and causes zoonotic infection. Human latent toxoplasmosis occurs in about half the world's population though most cases are asymptomatic. Toxoplasma encephalitis (TE) has become one of the more frequent opportunistic infection in HIV infected patients. Methods: This retrospective and descriptive study was carried out at the Referral Behavioral Counseling and Modification Center in Shiraz, Iran. We were able to review the medical records of 208 HIV infected patients. They were examined and their records were screened via the standardized data collection sheet for demographic characteristics. Diagnoses of TE based on the presence of at least two of the following findings: a history of neurological symptoms, neurological signs, suggestive CT, clinical and radiological response to antitoxoplasmosis medication. Results: The seroprevalence of toxoplasmosis among 208 HIV/AIDS patients was (18.2%) (38 patients) while 4 (10.4%) and 34 (89.6%) subjects showed Toxoplasma seropositivity with and without TE respectively. The majority of these patients were in the 25-34 age group, male, unemployed, single and residence in Shiraz, southern Iran. Conclusion: Toxoplasmosis is a silent disease, which poses many diagnostic and therapeutic challenges. Based on findings of this study, we support a screening program of Toxoplasma infection. Primary chemoprophylaxis should be routinely given to all HIV infected with Toxoplasma seropositive status. Also HIV infected individuals with Toxoplasma seronegative status may be advised about preventive behavioral practice.