Seroprevalence and associated risk factors ofToxoplasma gondiiinfection in psychiatric patients: a case-control study in eastern China

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Abstract
SUMMARY: In recent years, the effect ofToxoplasma gondiiinfection on the cerebrum and neuropsychiatric patients has been increasingly highlighted. However, there is limited information about the epidemiology ofT. gondiiinfection in psychiatric patients in Shandong province, eastern China. Therefore, through a case-control study, 445 patients hospitalized for diacrisis or treatment in Weihai, eastern China, and 445 control subjects from the general population of the same region matched by gender, age, and residence were examined with enzyme-linked immunoassays for the presence of IgG and IgM antibodies toT. gondiiand associated sociodemographic and behavioural characteristics in a population of psychiatric patients. Seroprevalence of IgG antibodies toT. gondiiin psychiatric patients (77/445, 17·30%) was significantly higher than in control subjects (55/445, 12·36%) (P= 0·038). Fourteen (3·15%) psychiatric patients and 10 (2·25%) control subjects had IgM antibodies toT. gondii(P= 0·408). Multivariate analysis using logic regression showed thatT. gondiiinfection was associated with cats at home and consumption of raw/undercooked meat in psychiatric patients. Considering that most psychiatric patients usually have lower cognitive functioning and additional transmission routes related to their inappropriate behaviours that could enhance the risk of infection, psychiatric patients should be considered as a specific group ofT. gondiiinfection.

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