It has been established that gB2 genotype prevails in the HIV-infected group, while in those who undergone organ transplantation, gB1 and gN3a genotypes are encountered more often, genotypes gB1, gB2 and gN4c, gN4a genotypes dominate among children with congenital CMV infection [14, 21–24]. This evidence concerns the gene GABBR1 and cytomegalovirus infection.