How long does a scabies mite live at room temperature? - briefly
At typical indoor temperatures of 20‑25 °C, a scabies mite can survive for roughly 48–72 hours without a human host. Survival declines sharply above 30 °C or below 10 °C.
How long does a scabies mite live at room temperature? - in detail
The adult Sarcoptes scabiei mite can remain viable on surfaces at typical indoor temperatures (approximately 20 °C to 25 °C). Survival time is limited by the need for a host to obtain nutrients. Under these conditions, an unfed adult will usually die within 48–72 hours.
Key factors influencing longevity:
- Relative humidity: At 70 %–80 % humidity, survival may extend to 4–5 days; lower humidity shortens the period to less than 48 hours.
- Temperature stability: Temperatures below 15 °C markedly reduce viability, while temperatures above 30 °C accelerate death.
- Life stage: Eggs, larvae, and nymphs are more vulnerable; they typically perish within 24 hours when detached from a host.
Laboratory studies report a maximum off‑host lifespan of about 10 days when both temperature and humidity are optimal, but such conditions are uncommon in ordinary rooms. Consequently, the practical risk of transmission from inanimate objects declines sharply after the first two days of exposure.