Human Head Louse (Egg/Nit)

Exclusively on the human scalp and hair shafts; they cannot survive more than 24-48 hours away from a human host.

Obligate ectoparasites that feed exclusively on human blood several times a day.

Nits are cemented to the hair shaft near the scalp. They cannot hop or fly and spread through direct head-to-head contact or sharing personal items like combs or hats.

Causes intense itching and secondary skin infections from scratching. They are a significant social nuisance but do not transmit infectious diseases like body lice do.