How long is the quarantine for lice? - briefly
After appropriate treatment, most schools permit a return within 24–48 hours if no live lice are detected. Some institutions require a full week without lice before ending the isolation period.
How long is the quarantine for lice? - in detail
The isolation period for a head‑lice infestation typically lasts until all live insects and eggs have been eliminated and a follow‑up inspection confirms no remaining nits. Standard practice requires at least a 7‑day window after the first effective treatment, because lice eggs hatch within 7–10 days. Many health authorities advise a second treatment 7–10 days after the initial application to target newly hatched nits, extending the overall quarantine to roughly 14 days.
Key points for compliance:
- Initial treatment: Apply a pediculicide shampoo, lotion, or oral medication according to the product label. Comb out nits with a fine‑toothed lice comb within 24 hours.
- First re‑inspection: Conduct a thorough head check 3–5 days after treatment. If live lice are found, repeat the treatment immediately.
- Second treatment: Perform a repeat application 7–10 days after the first dose to kill any hatchlings that survived the initial round.
- Final clearance: Verify absence of live lice and viable nits at least 48 hours after the second treatment. Only then may the individual return to school, daycare, or the workplace.
Some institutions adopt a stricter policy, allowing return only after a documented negative inspection by a healthcare professional. In such cases, the quarantine may extend up to 21 days if additional follow‑up visits are required.
Overall, the effective isolation duration ranges from 7 to 14 days, with a possible extension to three weeks for institutions with rigorous verification procedures. Compliance with the treatment schedule and thorough combing are essential to prevent re‑infestation and to satisfy public health guidelines.