Without blood meals, they die within one to two days. Pubic lice are quite active and can travel quickly, which explains why they are transmitted so easily. However, pubic lice are not long-distance travelers, and they do not do well away from the host for long periods of time.
Pubic lice are usually spread through sexual contact. This is why it is known as a sexually transmitted disease (STD). In rare cases, infestation can be spread through contact with an infested person's bed linens, towels, or clothes. Infection in a young child or teenager may indicate sexual activity or sexual abuse. Animals do not get or spread pubic lice.