how to know if you have head lice. The majority of people who have head lice have no idea they have an active case of head lice. If you try to see things from the point of view of a head louse, you will see that this makes sense. You don’t want your host to know you’re there until you have had the opportunity to produce multiple generations of lice on your host’s scalp. You need to have enough time to to produce enough offspring so that satellite lice can travel to new hosts.
how do you know if you have lice. Since the life cycle of the human head louse is only 30 days, lice depend on their offspring, their great great grandchildren actually, to go forth and populate other scalps. This is how head lice have been able to survive for thousands of years.
No itching! This is the most common symptom of head lice. Occasionally you can get an allergic rash on the back of your neck. This is not lice bites. After 2 months and 100,000 lice bites some people become sensitive to substances that are left behind when a head louse takes a blood meal. During the feeding process, head lice leave behind saliva, anticoagulant, and an anesthetic. Most people do not react to this mixture, however about 15% of people will develop an allergic reaction to one or all of the substances contained in the louse saliva. The allergic symptoms only appear after at least 2 months of the head lice colony being present on the scalp. Itching of the scalp and a rash on the back of the neck are the two most commonly experienced symptoms. To learn more click here.
Lice belong to the order Phthiraptera, and are the only truly parasitic group amongst the exopterygote insects. As permanent ectoparasites of most birds and mammals they exhibit a remarkable level of host specificity which is unparalleled in most other metazoan parasites. Most individuals will spend their entire life cycle on a single host, with transmission largely occurring opportunistically when hosts are in close contact with each other, such as during breeding. This unique lifestyle has led to numerous adaptations according to their precise ecological niche on the host, consequently lice are considerably diverse in terms of their size and general body form. Specializations in the diet of lice underpin their major taxonomic divisions and they can be broadly separated into those that feed on skin debris, feathers and fur, and those that have specialized in blood feeding, as do head lice.