IGHG3 and infection: The kinetic profile of anti-STAg IgG1 and IgG3 in individuals infected with T. gondii has been described in the literature and it has been observed that the levels of these antibodies increase over time: IgG1 levels increase until the 6th month of infection, followed by a slight decrease and maintenance of levels up to the 12th month of infection, whereas IgG3 levels increase only from the 3rd to the 6th month of infection [45].