Human papillomavirus genotype distribution among Cameroonian women with invasive cervical cancer: a retrospective study

Sexually Transmitted Infections
David PirekLiza Ho

Abstract

We determined the human papillomavirus (HPV) types present in invasive cervical cancer (ICC) of women in Cameroon in order to estimate the potential efficacies of HPV prophylactic vaccines. This is a retrospective study using 181 formalin-fixed paraffin-embedded cervical tissue samples of ICC collected from the Institute of Pathology, Gyneco-Obstetric and Pediatric Hospital, Yaoundé, Cameroon. HPV was detected by PCR using modified GP5+/GP6+ (MGP) primers. Genotyping was performed by reverse-blot hybridisation, which allowed the detection of 9 of the 14 high-risk HPV types. Of the 181 samples, 91.7% were squamous cell carcinomas and 6.6% were adenocarcinomas. Counting all the single and multiple infections, the three most common high-risk types in descending order were HPV16 (88%), HPV45 (32%) and HPV18 (14.8%). 54.9% of cases were infected with a single HPV type and 45.1% had two or more HPV infections. The frequencies of HPV16, HPV45 and multiple infections are all higher than previously reported. These observations have significant implications on the consideration of vaccination strategies because each vaccine has different duration and efficacies in cross-protection of different HPV types. The method used proved to be sens...Continue Reading

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