Detection of IgM, IgG and IgA against pertussis in pregnant women in I - II - III trimesters

Abstract

Purpose: to investigate the level anti-pertussis IgM, IgG, IgA in pregnant women in the I — II — III trimesters. Materials and methods. A total of 288 pregnant women aged. 17 — 43 years (in the I — II — III trimesters) were examined. A serums samples tested for IgM, IgG, IgA against pertussis by ELISA of RIDASCREEN (Germany). Results. Anti-pertussis IgG concentration below the low limit of detection occurred in 75,7% of pregnant women. The majority of seropositive among pregnant women was in the age group 26 — 35 years (82,9%). The proportion of seronegative among pregnant women increased. with increasing pregnancy periods, as well as depending on age. In III trimester IgG were detected in 18,2% of pregnant women. The most seronegative among pregnant women were in the III trimester and at the age of over 36 years old. The detection of IgM, IgG and IgA made it possible to detect the active infection process in 11 (3,9%) pregnant women by elevated level of IgA. High IgA level only in combination with IgM was in serum sample from 1 pregnant woman, high IgA level in combination with IgG at negative values of IgM was in serum samples from 8 pregnant woman. Only IgA in serum sample from 2 pregnant women (I and III trimesters of pregnancy) were detected. This is probably due to the presence of whooping cough or mucosal contamination with B.pertussis (persisting IgA). Conclusion. The serological studies have shown the need to develop algorithms for protecting newborns — from, the moment pregnant women are registered, to the onset of childbirth. These algorithms will provide information about on the presence of whooping cough and will help prevent infection of the newborn.