My wife was diagnosed with hpv. i know that i have never had any sexual encounters with anyone else and she says she has not either. is this possible?

This isn't rare. Some HPV infections are unexplained.

In medicine any thing is possible. It is best that both of you get chwcked and treated.

Please get checked yourself and discuss with your doctor. Also, you should consider HPV vaccination if you have not yet been vaccinated with the most recent HPV vaccine.

HPV can be spread through contacts other than penis in vagina sex. Visit this site for more information and get HPV vaccine: https://www.cdc.gov/cancer/hpv/basic_info/hpv_oropharyngeal.htm#:~:text=HPV%20is%20the%20most%20common,or%20possibly%20in%20other%20ways.

Non sexual transmission of HPV is possible when infected skin is in direct contact with broken or macerated skin. This is seen i children and young adults or workers who handle chicken, fish and meat .A viral wart from another person with contact to you, is possible.