No association between latent toxoplasmosis and vitamin D concentration in human: three observational studies

We tested the hypothesis that the Toxoplasma-infected subjects have lower vitamin D levels in the blood serum than the Toxoplasma-free subjects by measuring the concentration of vitamin D in the serum of subjects from three independent populations tested for the Toxoplasma infection. Data include participant age and sex, calcidiol level and toxoplasmosis positivity/negativity. Study A. Cross-sectional study performed on a cohort of 72 neurasthenic patientsStudy B. (Preregistered study): Case-control study performed on 400 subfertile subjectsStudy C. (Confirmation study): Cross-section study performed on 191 members of the general public