Association of Vac A- and Cag A-specific Helicobacter pylori strain infection with spontaneous preterm birth

Seung Woo Yang, Han Sung Kwon, In Sook Sohn, Young Ju Kim, Han Sung Hwang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Purpose: To better understand the correlation between Helicobacter pylori (H. pylori) seropositivity and spontaneous preterm birth. Materials and methods: A total of 320 pregnant women were classified into two groups: normal control singleton pregnant group (n = 264) and singleton spontaneous preterm birth group (n = 56). Blood samples were collected at the time of delivery, and the H. pylori IgG, various virulence factors and systemic inflammation status were compared between the two groups. Results: Between the two groups, the serum H. pylori IgG, Cytotoxin-associated agntigen A (Cag A), Vacuolating cytotoxin A (Vac A) significantly increased in spontaneous preterm birth group than in the control group. Also, in preterm group, highly sensitive C-reactive protein (hsCRP) as a systemic inflammatory marker is statistically elevated at inflammatory status range. Whereas in the term pregnant group, hsCRP was normal range even though high incidence of H. pylori IgG seropositivity. Also, in the seropositive group, hsCRP is statistically correlated with H. pylori IgG, Cag A and Vac A. Conclusions: There is an association between the presence of antibodies against H. pylori in maternal serum and the development of preterm birth. Furthermore, serology type of H. pylori with Vac A, Cag A relates to preterm birth even though high H. pylori prevalence rate.

Original languageEnglish
Pages (from-to)995-1000
Number of pages6
JournalJournal of Maternal-Fetal and Neonatal Medicine
Issue number8
StatePublished - 18 Apr 2017

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© 2016 Informa UK Limited, trading as Taylor & Francis Group.


  • Helicobacter pylori seropositivity
  • highly sensitive C-reactive protein
  • spontaneous preterm birth


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