Abnormal Pap Test - Cause
abnormal Pap tests are caused by
human papillomavirus (HPV) infections. Other types of
infection-such as those caused by bacteria, fungi (yeast), or protozoa
(Trichomonas)-sometimes lead to minor changes on a Pap
test called atypical squamous cells of undetermined significance (ASC-US). The most common cause is HPV infection.
Natural cervical cell changes (atrophic vaginitis) related to
menopause can also cause an abnormal Pap test.