Impact of Vaccination History on Serological Testing in Pregnant Women.

Objective: Serological testing guidelines for vaccine-preventable infectious diseases in pregnant women are heterogeneous. It is unclear how vaccination history influences health care workers' (HCWs) attitudes about testing. The aim of this study was to describe current practices in screening for rubella, hepatitis B, and varicella-zoster virus (VZV) in pregnant women in the province of Québec.

Methods: In 2015, an electronic survey was distributed to HCWs who followed the case of at least one pregnant woman in the previous year and who could be contacted by email by their professional association.

Results: A total of 363 of 1084 (33%) participants were included in the analysis: general practitioners (57%), obstetrician-gynaecologists (20%), midwives (41%), and nurse practitioners (31%). For rubella, 48% of participants inquired about vaccination status, and of these, 98% offered serological testing for unvaccinated women versus 44% for vaccinated women. Similarly, of the 48% of participants who asked about hepatitis B vaccination status before offering testing, 96% ordered testing for hepatitis B surface antigen, 28% ordered testing for hepatitis B surface antibody, and 1% ordered no serological testing to unvaccinated women versus 72%, 46%, and 8%, respectively, for vaccinated women. Among the 81% of respondents who discussed VZV during prenatal care, 13% ordered serological testing if patients had a history of VZV infection, 87% if the VZV history was uncertain, and 19% if patients had a positive history of vaccination.

Conclusion: Asking about vaccination status influences HCWs' attitudes about serological testing for rubella, hepatitis B, and VZV. In the context of increasing vaccination coverage in women of child-bearing age, it is important to clarify the impact of vaccination status in serological screening guidelines in pregnant women.