Does Toxoplasma gondii infection affect cognitive function? A case control study.

Area of Science:

• Neuroscience
• Infectious Diseases
• Psychology

Background:

• Latent Toxoplasma gondii infection is widespread globally.
• Previous research suggests a potential link between toxoplasmosis and altered brain function.
• The impact of latent toxoplasmosis on human cognitive performance remains an area of investigation.

Purpose of the Study:

• To examine the association between latent toxoplasmosis and cognitive performance in humans.
• To determine if T. gondii infection influences performance on specific neuropsychological tests.

Main Methods:

• A cohort of 70 individuals was assessed for latent T. gondii infection status (26 infected, 44 uninfected).
• Cognitive performance was evaluated using standardized tests including the N-back test, Trail Making Test, Stroop Test, Verbal Fluency Test, and Digit Span Test.
• Statistical analyses were performed to assess the relationship between toxoplasmosis and cognitive scores, with adjustments for age and sex.

Main Results:

• Initially, infected individuals showed poorer performance on the N-back test (percentage of correct answers).
• However, after adjusting for age and sex, this statistically significant association was no longer observed.
• No significant differences in cognitive test scores were found between Toxoplasma-infected and uninfected subjects when controlling for demographic factors.

Conclusions:

• This study did not find statistically significant evidence to confirm that chronic latent T. gondii infection affects cognitive performance.
• Further research with larger sample sizes or different methodologies may be needed to fully elucidate any potential subtle effects.