Infección cervical por virus del papiloma humano: genotipificación por hibridación in situ y análisis ultraestructural por microscopia electrónica de transmisión

introduction: human papillomavirus (hpv) is the most common sexually transmitted virus, is strongly associated with cervical cancer. hpv genital types differs in oncogenic potential, types 6/11 are low-risk and, types 16/18, 31/33 are high-risk. in situ hybridization (ish) analysis has advantage of being able to detect both, the specific cellular types infected with viral dna and the hpv types in cervical biopsies and therefore, cervical cancer patient's risk. objective: this work was performed in order to typing hpv in cervical biopsies with cytological, colposcopical and histopathological evidence of hpv infection, and to search ultrastructural changes associates with viral infection. results: we analyzed, by ish, 63 cervical biopsies, 24 (38%) positives to some viral type, hpv types 6/11 were more common types (24%) consistent with the more frequent, both colposcopical and histopathological diagnostic; low-grade intraepithelial lesion. ultraestructural analysis showed cellular alteration in association with low-risk types, principally irregular nucleus and several nucleolus for nucleus, as long as cells infected with oncogenic types dna showed multilobulated nucleus, cytoplasmic inclusions and viral particles in nucleus. in both cases is clear an disorganization of cellular junctions desmosomes. conclusions: the hpv prevalence in this study was consistent with other reported, using ish analysis, the more common types were low-risk types in agreement with previous diagnostic, and electron microscopy analysis provide evidence on the main cell alterations associated with viral infection.