[Congenital and perinatal infections in the Marche region (Italy): an epidemiological study and differences between ethnic groups].

The purpose of this study was to evaluate the epidemiological data regarding congenital and perinatal infections in the Marche region to verify the existence of differences in relation to maternal country of origin. This prospective study was conducted from May 2001 to April 2012, and it involved all the maternity units of the Marche region. A total of 10232 pregnant women were included, 25.1% of whom were of foreign nationality while the number of births totalled 10371. Estimated uptake of antenatal screening was 80.5% for CMV infection, 98.6% for HBV infection, 97.5% for HCV infection, 97.4% for HIV infection, 93.1% for syphilis and 98.5% for toxoplasmosis. For group B streptococcus vaginal and perianal swabs were performed in 81.2% of all women (78.4% in immigrant and 90.4% in Italian women; the difference was statistically significant [p 0.001]) and 13.6% were positive. The overall prevalence for CMV infection was 72.3% (91.9% in immigrant women) while for toxoplasmosis it was 27.5% (28.8% in immigrant women). The rate of seroconversion in pregnant women investigated for CMV infection was 0.28%, while that for toxoplasmosis was 0.09%. The overall prevalence for HBV infection was 0.79% (4.3% in immigrant and 0.4% in Italian pregnant women; the difference was statistically significant [p 0.001]), 0.4% for HCV infection (1% in immigrant and 0.48% in Italian pregnant women; the difference was not statistically significant [p 0.413]), 0.22% for syphilis (0.8% in immigrant and 0.08% in Italian pregnant women; the difference was not statistically significant [p 0.062]), 0.09% for HIV infection, and 0.03% for tuberculosis. The prevalence of congenital CMV infection was 0.04% and that of congenital toxoplasmosis 0.01%. The prevalence of early-onset infection from Group B streptococcus was 0.029%. No cases were observed of congenital syphilis, congenital tuberculosis or maternal and neonatal HSV infections. The study proves that in the Marche region there is a high percentage of women who undergo prenatal screening, including screening for infections, not offered by the National Health Service, such as CMV and HCV. The data also demonstrate that some infections, such as tuberculosis, HIV and HBV, almost exclusively affect immigrant women. Regarding neonatal infections, the data presented are in line with those in the literature, with the exception of congenital CMV infection, in which the low prevalence observed could be linked to the recent and massive migration of already immunized women.