Gender differences in behavioural changes induced by latent toxoplasmosis

Area of Science:

• Behavioral neuroscience
• Infectious disease
• Psychology

Background:

• The protozoan Toxoplasma gondii infects a significant portion of the human population globally.
• Latent Toxoplasma gondii infection is linked to behavioral and personality changes, with potential gender-specific effects.
• Previous studies suggest Toxoplasma gondii influences personality factors like warmth, rule consciousness, vigilance, and self-control.

Purpose of the Study:

• To experimentally verify gender differences in behavior associated with Toxoplasma gondii infection.
• To investigate the impact of Toxoplasma gondii on specific behavioral variables analogous to Cattell's 16PF personality factors.
• To explore the interaction between infection status, gender, and environmental factors (urban/rural) on behavior.

Main Methods:

• A double-blind experiment was conducted on 72 uninfected men, 142 uninfected women, 20 infected men, and 29 infected women.
• Behavioral experiments were used to assess composite variables related to self-control, clothes tidiness, relationships, and mistrust.
• Statistical analysis examined the interaction effects of toxoplasmosis and gender on measured behavioral variables.

Main Results:

• A significant toxoplasmosis-gender interaction was found for Self-Control and Clothes Tidiness; infected men scored lower than uninfected men, while women showed a trend in the opposite direction.
• The toxoplasmosis-gender interaction approached significance for Relationships, with infected men scoring lower than uninfected men, and no difference observed in women.
• The 'Mistrust' variable showed a pattern influenced by environmental factors (rural vs. urban).

Conclusions:

• Toxoplasma gondii infection exhibits gender-specific behavioral effects, notably in self-control and conscientiousness.
• Infected men may experience reduced self-control and warmth compared to uninfected men.
• Environmental context may modulate the impact of Toxoplasma gondii on certain personality traits like mistrust.