Head Lice

Overview

Head Lice Information

A US penny is shown with nit, nymph, and adult head lice for scale.

The District laboratory works with local public schools to provide training and guidance on preventing, identifying, and managing head lice in schools.

Checking for and Treating Headlice
Video

Checking for and Treating Headlice

Laboratory Director Dr. Nayer Zahiri describes how to check for and treat headlice.

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Head Lice Information

About Head Lice

The tiny parasitic insects known as head lice can infest the head and neck area and attach their eggs to the base of the hair shaft. Head lice do not cause disease, but they can itch and irritate the scalp, leading to scratching and potential bacterial infection.

Head Louse Nymph at SMCMVCD Laboratory
Video

Head Louse Nymph at SMCMVCD Laboratory

This tiny head louse nymph hatched from a nit collected from a child’s head by a member of our laboratory staff.

Notice how its feet are equipped with tiny hooks (tarsi) used to grip the hair shaft. That’s why it’s impossible to shampoo lice out – they must be combed out with a special louse comb.

Commands