Historic & Scenic Sites in and around Washington County, MO by Esther & Gene Carroll History of Washington County Jails & Courthouses by Esther Carroll These links are a part of Carrolls' Corner - lots of Washington County History!
In a humid environment, over 60% of newly hatched fleas can live without a host for 2 months. In a cool, dry environment, only 10% will live without an immediate host. Humidity is the key to flea survival.
Lice securely adhere their eggs, or nits, to hair shafts on their host. However, once hatched, nymphal and adult lice sometimes fall off their host or get knocked off by the host's scratching. Lice don't quickly die without a host, though, and generally survive for three to seven days on their own.The species, age, environmental factors, when they last fed and other specifics can affect exactly how long a louse is able to live off of a host.ice securely adhere their eggs, or nits, to hair shafts on their host. However, once hatched, nymphal and adult lice sometimes fall off their host or get knocked off by the host's scratching. Lice don't quickly die without a host, though, and generally survive for three to seven days on their own.