Pathogenesis (disease development)
Felt lice are among the ectoparasites of humans. They reside exclusively in the body heat. They are among the bloodsuckers.All stages of development take place on the host. Female lice lay up to four drop-shaped eggs a day, which are individually attached to hair.The development period is about 18 days at an ambient temperature of approximately 27 °C. Deviations from this temperature lead to migration to the rapid death of the louse.Crabs have a life span of circa three weeks.
Etiology (causes)
Behavioral causes
- Transmission through direct physical contact (especially sexual intercourse).
- Rarely transmission through shared clothing, bed linen or towels.
