CD40LG and infection: Articles that exclusively investigate the prevalence of T. gondii detection using molecular techniques solely in patients who have tested positive through serological methods, articles investigate only seropositive patients for IgG antibodies [12-14], studies either lack the seropositive patients for both IgG and IgM antibodies or do not provide the possibility to calculate the number of IgG- or IgM-positive donors separately (only IgG-positive or IgM-positive, without overlapping) [15,16] and studies regarding other infections