Other contributors have said "What are is the treatment for pubic lice?" is the same question as "What causes pubic lice?" If you believe that these are not asking the same thing and should be answered differently, click here
There is no pathogen for pubic lice as they aren't a disease. They are insects which crawl onto your body or clothes from the clothing or body of another person who has an infestation of them.
you have sex with someone else that has lice and cause you to get infected.. using protection doesnt completely block all the hair and you can get it .. wash your junk so you dnt get it .. bt still...