- Volume 16 Issue 15
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Type-Specific Human Papillomavirus Distribution in Invasive Squamous Cervical Carcinomas in Tunisia and Vaccine Impact
- Ennaifer, Emna (HPV Research Unit, Laboratory of Molecular Epidemiology and Experimental Pathology Applied to Infectious Diseases) ;
- Salhi, Faten (HPV Research Unit, Laboratory of Molecular Epidemiology and Experimental Pathology Applied to Infectious Diseases) ;
- Laassili, Thalja (HPV Research Unit, Laboratory of Molecular Epidemiology and Experimental Pathology Applied to Infectious Diseases) ;
- Fehri, Emna (HPV Research Unit, Laboratory of Molecular Epidemiology and Experimental Pathology Applied to Infectious Diseases) ;
- Alaya, Nissaf Ben (National Observatory of Novel and Emergent Diseases) ;
- Guizani, Ikram (HPV Research Unit, Laboratory of Molecular Epidemiology and Experimental Pathology Applied to Infectious Diseases) ;
- Boubaker, Samir (Department of Human and Experimental Pathology, Pasteur Institute of Tunis)
- Published : 2015.10.06
Background: High risk human papillomaviruses (HPVs) are the leading cause of cervical cancer (CC) and Pap smear screening has not been successful in preventing CC in Tunisia. HPV vaccination that targets HPV16 and 18 offers a new efficient prevention tool. Identification of HPV types in CC is thus essential to determine the impact of HPV vaccine implementation. The aim of this study is to provide specific data from Tunisia. Materials and Methods: A total of 89 histological confirmed paraffin embedded samples isolated from patients with CC diagnosed between 2001 and 2011 were collected from five medical centres from Northern and Southern Tunisia. HPV DNA was detected using a nested PCR (MY09/MY11-GP5+/GP6+) and genotyping was assessed using a reverse blot line hybridisation assay that enables the detection of 32 HPV types. Results: HPV DNA was detected in all samples. Twelve high risk types were detected; HPV16 and/or 18 were predominant, accounting together for 92.1% of all the CC cases (HPV16: 83.1%). Single infections accounted for 48.8% of the cases and were mostly linked to HPV 16 (32.6%) and less frequently to HPV 18 (2.4%). The other high risk HPV single infections were linked to HPV 35 (4.6%), 45 (4.6%), 58 (2.3%) and 59 (2.3%). Multiple infections with mixing of 2 to 4 genotypes predominately featrued HPV16 and/or 18 with HPV 35 and 45 (96.6 %) and less frequently with HPV 59, 40, 66, 73 and 58. There was no statistically significant variation in the relative distribution of HPV types with age. Conclusions: These results strongly indicate that prophylactic HPV vaccines can have a major impact in preventing CC in Tunisia.
Cervical cancer;human papillomavirus;genotypes;vaccine;Tunisia
Supported by : Ministry of Technology and Scientific
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