[Serologic survey for the determination of antibodies against various virus infections, Mycoplasma, beta hemolytic A Streptococcus and Toxoplasma gondii, performed on children of a State-of-Mexico municipality].

A seroepidemiologic inquest was carried out in 667 children from the county of Huixquilucan, Mexico, looking for serum antibodies against infections caused by the following microorganisms: Epstein-Barr virus; cytomegalovirus; syncytial respiratory; para-influenza 1, 2 and 3; measles; rubella; mumps; Mycoplasma pneumoniae, beta hemolytic A Streptococcus and Toxoplasma gondii. The findings are reported. Considerations are made on the incidence of these diseases in different age groups and a comparison is established with the findings in other countries, since there is no previous information in Mexico for some of the viral agents studied.