HPV types in cytological alterations. Relative prevalence of HPV types associated with three different grades of cytological findings expressed as a proportion of total HPV infections in the three groups. Asterisks mark HPV types not typeable by the Hybrid Capture 2 assay. 44 (55): subtype of HPV44 formerly classified as HPV55. ASCUS, n = 296 samples; L-SIL, n = 555 samples; H-SIL, n = 143 samples.