How to catch lice? - briefly
Use a fine-toothed comb on damp hair, moving from the scalp outward after applying a conditioning spray to immobilize the insects. Examine the comb after each pass and collect any nits with a tissue for proper disposal.
How to catch lice? - in detail
Capturing head‑lice requires a systematic approach that combines visual inspection, appropriate tools, and controlled environments. Begin with a thorough examination of the scalp and hair. Use a bright light and a fine‑toothed lice comb, moving from the scalp outward in sections of 2–3 cm. After each pass, wipe the comb on a white cloth or rinse it in a bowl of water to check for live insects or nits.
If lice are detected, isolate a small sample for identification. Place a few captured specimens on a glass slide with a drop of saline solution, cover with a coverslip, and examine under a low‑magnification microscope (10–40×). Confirm the presence of adult lice by observing the characteristic body shape, six legs, and reddish‑brown coloration.
To increase capture efficiency, create a controlled environment:
- Wet‑comb method: Saturate hair with a conditioning spray, then comb repeatedly for 10 minutes. Moisture immobilizes lice, making them easier to collect.
- Heat‑trap technique: Position a hair dryer on low heat, 5 cm from the scalp, while combing. Heat encourages lice to move away from the source, where they become trapped on the comb.
- Adhesive traps: Apply a thin layer of medical‑grade adhesive tape to a comb tooth, then run the comb through the hair. Lice adhere to the sticky surface and remain attached for later analysis.
After collection, preserve specimens in 70 % ethanol if laboratory identification is required. Label each vial with the date, location, and host details to maintain accurate records.
Finally, implement a decontamination protocol for all tools and surfaces. Soak combs in a solution of 0.5 % bleach for 10 minutes, rinse thoroughly, and air‑dry. Wash clothing, bedding, and personal items in hot water (≥ 60 °C) and dry on high heat. Repeat the inspection and capture process after 7 days to address any newly hatched lice that may have escaped the initial sweep.