Epidemiol Prev
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Chronic infections and infestations represent major causes of cancer. Overall, Helicobacter pylori, HPV, HBV, and HCV are estimated to account for 15% of all human cancers. We have estimated that cancers associated with 6 pathogens in Italy account for 31,000 yearly cases, 42.0%of which is attributable to H. pylori, 34.7%to HBV and HCV, 19.8%to HPV, 2.9%to KSHV, and 0.2% to EBV. ⋯ Secondary prevention is based on screening programs that include Pap smear cytology and/or HPV test. To reduce the burden of HIV-associated cancers, prevention programs include primary prevention of HIV infection, early diagnosis and treatment, restoration of immune function, reduction in the prevalence of associated infections and risk factors, and secondary prevention. To date, anti-HBV and anti-HPV vaccinations, eradication of H. pylori infection, treatment of HCV and HIV carriers with antivirals, and HPV-related cancer screening prove to be the most effective strategies for the prevention of infection-associated cancers.