TY - JOUR T1 - Pertussis vaccination during pregnancy in Vietnam: Results of a randomized controlled trial Pertussis vaccination during pregnancy. JF - Vaccine Y1 - 2016 A1 - Hoang, Ha Thi Thu A1 - Leuridan, Elke A1 - Maertens, Kirsten A1 - Nguyen, Trung Dac A1 - Hens, Niel A1 - Vu, Ngoc Ha A1 - Raïssa Nadège Caboré A1 - Duong, Hong Thi A1 - Huygen, Kris A1 - Van Damme, Pierre A1 - Dang, Anh Duc KW - Adult KW - antibodies KW - Bacterial KW - Diphtheria-Tetanus-acellular Pertussis Vaccines KW - Disease Transmission, Infectious KW - Enzyme-Linked Immunosorbent Assay KW - Female KW - Humans KW - Immunity, Maternally-Acquired KW - Immunization Schedule KW - Infant KW - Infant, Newborn KW - Male KW - Pregnancy KW - Treatment Outcome KW - Vietnam KW - Whooping Cough KW - Young adult AB -

A pertussis vaccination during pregnancy has recently been adopted in several countries to indirectly protect young infants. This study assessed the effect of adding a pertussis component to the tetanus vaccination, in the pregnancy immunization program in Vietnam. A randomized controlled trial was performed. Pregnant women received either a Tdap (tetanus, diphtheria acellular pertussis) vaccine or a tetanus only vaccine between 19 and 35 weeks' gestational age. Immunoglobulin G (IgG) against tetanus (TT), diphtheria (DT), pertussis toxin (PT), filamentous hemaglutinin (FHA) and pertactin (Prn) were measured using commercial ELISA tests, at baseline, 1 month after maternal vaccination, at delivery, and in infants from cord blood and before and after the primary series (EPI: month 2-3-4) of a pertussis containing vaccine. Significantly higher geometric mean concentrations (GMC) were observed for all 3 measured pertussis antigens in the offspring of the Tdap group, up to 2 months of age. One month after completion of the primary infant vaccination schedule, anti-Prn GMC, but not anti-PT and anti-FHA GMCs, was significantly (p=0.006) higher in the control group. Maternal antibodies induced by vaccination during pregnancy close the susceptibility gap for pertussis in young infants. Limited interference with the infant vaccine responses was observed. Whether this interference effect disappears with the administration of a fourth vaccine dose is further studied.

VL - 34 CP - 1 U1 - http://www.ncbi.nlm.nih.gov/pubmed/26529073?dopt=Abstract M3 - 10.1016/j.vaccine.2015.10.098 ER -