Over a million pregnant women infected with syphilis world-wide

Press release from PLOS Medicine

2013-02-27

(Press-News.org) Syphilis still affects large numbers of pregnant women world-wide, causing serious health problems and even death to their babies, yet this infection could be prevented by early testing and treatment, according to a study by international researchers published in this week's PLOS Medicine.

Researchers, led by Lori Newman from the World Health Organization, estimate that in 2008, 1.4 million pregnant women around the world were infected with syphilis, 80% of whom had attended antenatal care services.

The researchers reached this figure by using information on the number of syphilis infections from 97 countries and on antenatal clinic attendance from 147 countries and then inputting this information into a model.

In consultation with experts, the authors used a realistic scenario to estimate the percentage of pregnant women tested for syphilis and adequately treated, ranging from 30% for Africa and the Mediterranean region to 70% for Europe. Based on this scenario, the authors estimate that in 2008, syphilis infections in pregnant women caused approximately 520,000 harmful outcomes, including 215,000 stillbirths, 90,000 neonatal (baby) deaths, 65,000 preterm or low birth-weight babies, and 150,000 babies with congenital infections.

The authors estimate that in 2008, testing and treating pregnant women for syphilis prevented a quarter of such harmful outcomes but worryingly, the authors found that about two-thirds of these harmful effects occurred in women who had attended antenatal care but were not treated or tested for syphilis.

The authors say: "This analysis indicates that syphilis continues to be an important cause of adverse outcomes of pregnancy, including substantial numbers of perinatal deaths and disabilities."

They continue: "Countries also need to ensure that quality-assured syphilis testing is available in all antenatal clinic settings, now possible even in remote care settings with the introduction of rapid point-of-care diagnostics."

The authors add: "In addition, efforts are needed to ensure universal access to early antenatal care, as well as improved quality of antenatal care so that all pregnant women receive an essential package of services that includes routine and early access to point-of-care testing and adequate treatment for syphilis if seropositive."

### Funding: GBG was funded by The Wellcome Trust (#WPIA-P30479) while working at Imperial College London. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. LN is a staff member of the World Health Organization. The author alone is responsible for the views expressed in this publication and they do not necessarily represent the decisions or policies of the World Health Organization. MK is a staff member of the CDC. The findings and conclusions in this paper are those of the author and do not necessarily represent the views of the CDC.

Competing Interests: The authors have declared that no competing interests exist.

Citation: Newman L, Kamb M, Hawkes S, Gomez G, Say L, et al. (2013) Global Estimates of Syphilis in Pregnancy and Associated Adverse Outcomes: Analysis of Multinational Antenatal Surveillance Data. PLoS Med 10(2): e1001396. doi:10.1371/journal.pmed.1001396

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Contact: Lori Newman
Department of Reproductive Health and Research
World Health Organization, Geneva, Switzerland
newmanl@who.int END

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Over a million pregnant women infected with syphilis world-wide

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