CD40LG and toxoplasmosis: The presence of IgM combined with a very low IgG titer is highly suggestive of early seroconversion for toxoplasmosis, which is confirmed if there is a prior negative sample; toxoplasmosis seroconversion was defined as the emergence of specific immunoglobulin IgG in previously seronegative women or as a significant rise in IgG in women with specific IgM [7].