title: Seroepidemiology of human papillomavirus type 73: a sexually transmitted low-risk virus.
abstract: Human papillomavirus type 73 (HPV 73) has been detected in some invasive cervical cancers and has been cloned from a squamous-cell carcinoma of the esophagus, but the epidemiology of this infection and its associated risk of cancer is unknown. We investigated the seroepidemiology of this virus using virus-like particles. The IgG response to HPV 73 appeared to be HPV type-specific, since a comparison of HPV 73 antibody levels before and after infection with HPV 6, 11, 16, 18 or 33 found no evidence of cross-induction of HPV 73 antibodies and since there was little correlation between the antibody levels to HPV 73 and the other 5 investigated HPV types. In both a cross-sectional serosurvey that included 274 women and a 7-year follow-up study that enrolled 98 women, HPV 73 seropositivity was found to be strongly dependent on the number of lifetime sexual partners [OR for > 4 vs. 0 to 1 partners: 6.0 (95%CI: 1.4-53.6) and 7.9 (95% CI: 2.8-28.3), respectively]. Finally, the risk for HPV 73 seropositive women to develop CIN was investigated in a prospective study nested in a cohort of 15,234 Swedish women. The population-based HPV 73 seroprevalence in Sweden was 14%. No excess risk for CIN was found (OR: 0.77). We conclude that HPV 73 is a mainly sexually transmitted, probably mostly transient, infection that does not confer any measurably increased risk for CIN development.
authors.affiliation: Laboratory of Tumor Virus Epidemiology, Microbiology and Tumor Biology Center, Karolinska Institute, Stockholm, Sweden. kengling@sec.se
authors.forename: K L
authors.initials: KL
authors.lastname: Wallin
authors.forename: G J
authors.initials: GJ
authors.lastname: van Doornum
authors.forename: A
authors.initials: A
authors.lastname: Andersson-Ellström
authors.forename: I
authors.initials: I
authors.lastname: Kallings
authors.forename: F
authors.initials: F
authors.lastname: Wiklund
authors.forename: G
authors.initials: G
authors.lastname: Hallmans
authors.forename: J
authors.initials: J
authors.lastname: Schiller
authors.forename: J
authors.initials: J
authors.lastname: Dillner
mesh_terms: D000328:Adult; D000914:Antibodies, Viral / Q000097:blood*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D027383:Papillomaviridae / Q000276:immunology* / Q000302:isolation & purification; D030361:Papillomavirus Infections / Q000453:epidemiology* / Q000821:virology; D015995:Prevalence; D011446:Prospective Studies; D012306:Risk; D015229:Sexually Transmitted Diseases, Viral / Q000453:epidemiology* / Q000821:virology; D013548:Sweden / Q000453:epidemiology; D014412:Tumor Virus Infections / Q000453:epidemiology* / Q000821:virology; D002583:Uterine Cervical Neoplasms / Q000453:epidemiology* / Q000821:virology; D002578:Uterine Cervical Dysplasia / Q000453:epidemiology* / Q000821:virology
chemical_list: D000914:Antibodies, Viral