title: Ectopic pregnancy and chlamydial serology.
abstract: OBJECTIVE
  To determine the prevalence of humoral IgG antibodies to Chlamydia trachomatis in women with tubal pregnancies.
  
  
  METHODS
  A study was made of 49 women with tubal pregnancies. The control group consisted of 50 pregnant women without any known fertility problems.
  
  
  RESULTS
  Compared with the pregnant group of women, a statistically significant higher prevalence of chlamydial IgG antibody titer > or = 64 was observed among the patients with gross abnormalities in the fallopian tube contralateral to the ectopic gestation (P = 0.002). The differences in geometric mean titer (GMT) were also statistically significant (P = 0.0004) between those two groups. The recall frequency of past pelvic inflammatory disease (PID) was increased 5-6-fold in patients with ectopic pregnancy, compared with the intrauterine pregnant women. Twenty-five of 30 patients (83%) with ectopic pregnancy and macroscopic tubal sequelae recalled a history of PID. The prevalence of chlamydial IgG antibody titer > or = 64 among women with a past history of PID was 75.6% (34/45), compared with 44.4% (24/54) among the women without any history of past PID history (P = 0.002). Concerning GMT, the numbers were 27 and 154 among women with and without a past history of PID, respectively (Fig. 2).
  
  
  CONCLUSIONS
  These findings suggest that C. trachomatis is a major cause of oviductal damage, which predisposes to ectopic pregnancy.
authors.affiliation: Department of Obstetrics and Gynecology, University Hospital of Tromsø, Norway.
authors.forename: J O
authors.initials: JO
authors.lastname: Odland
authors.forename: G
authors.initials: G
authors.lastname: Anestad
authors.forename: S
authors.initials: S
authors.lastname: Rasmussen
authors.forename: R
authors.initials: R
authors.lastname: Lundgren
authors.forename: K
authors.initials: K
authors.lastname: Dalaker
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000032:analysis*; D002690:Chlamydia Infections / Q000150:complications* / Q000276:immunology; D002692:Chlamydia trachomatis / Q000276:immunology*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D000292:Pelvic Inflammatory Disease / Q000150:complications; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000209:etiology / Q000382:microbiology; D011274:Pregnancy, Tubal / Q000209:etiology / Q000382:microbiology*
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G