There are at least a few dozen types of HPV. Different types can cause cancer of the cervix, genital warts, warts growing in the throat and, less commonly, cancers of the throat, vagina, vulva, penis and anus.
About 90 percent of HPV infections go away on their own within a couple of years, knocked out by the body's immune system. Patients diagnosed with an HPV infection typically get follow-up tests every six to 12 months to see whether the infection has cleared up or persisted long enough to require treatment.
The Trovagene test, soon to be available through health care providers, would make follow-up tests after diagnosis easier.
Chances of HPV infection can be reduced by use of condoms, limiting number of sexual partners and immunization against most disease-causing types. Two vaccines are recommended for adolescent boys and girls and for men and women through age 26: Merck & Co.'s Gardasil and GlaxoSmithKline PLC's Cervarix.Trovagene shares rose 35 cents, or 6.1 percent, to $6.10 in regular trading Wednesday, then climbed another 65 cents, or 10.7 percent, to $6.75 in after-hours trading. Shares have traded in a range of $1.86 to $8.96 over the past 52 weeks. ___ Follow Linda A. Johnson on Twitter at http://twitter.com/LindaJ_onPharma