The life of head lice progresses in three levels: nit, nymph, and adult. Like many other types of life, the first stage of existence of a head louse is as an egg, known as a nit. An adult female lays the egg at the bottom of a strand of hair, where it stays connected by an adhesive substance. The eggs are laid with proximity to the scalp, as the heat it generates is required for incubation. The nits are roughly 0.8mm by 0.3mm in dimension, oval in shape and possess a shade between white and yellow. On a median, they hatch 6 to 9 days after being laid.
The subsequent stage in its life cycle is when the egg hatches and out comes the nymph. It shares the appearance of a grown louse, however is barely smaller in measurement. Nymphs are often as small as a pinhead and have a yellow to rust-color. The shell it emerges from turns yellow whereas remaining hooked up to the strand of hair. Because the nymph grows, it sheds its exoskeleton 3 occasions before attaining adulthood. The nymphs wander on the neckline and behind the ears whereas remaining nearer to the scalp. They enter adulthood in about 7 days time.
The grownup stage is marked with a 5 instances a day feeding sample. It does this by penetrating the pores and skin utilizing its claws and sucking out blood. Without these regular meals, an grownup louse dies inside a day or two. Put up feeding, the lice take on a rust colour, although, in any other case they appear grayish-white. Adult lice are usually the scale of a sesame seed, with females being larger. They have 6 legs with sharp claws used to maintain a agency grip on the strands of hair. Nestled safely on a person’s head, they’ll dwell for up to 30 days. Throughout this time, the females can and may lay up to 8 nits per day.
Symptoms and Therapy
The at first sign of head lice infestation is itching. Upon checking, one can spot these tiny insects moving about in a person’s hair. They also can cause the lymph nodes, within the back and entrance of the neck to swell. People often contract head lice from an individual, who already has an infestation. This may increasingly happen attributable to direct contact with the hair or head of that particular person and even through the use of their combs/brushes, scarves hats, or coats. Nevertheless, they can even spread via pillows, towels, beds, and stuffed toys.
There are a number of medications for head lice remedy. Pediculicides, is one in all the best medications they usually need to be applied directly to the scalp and hair, and rinsed after 10 minutes for higher result. These medications effectively kill nymphs and adult lice, but fail to destroy nits. Nonetheless, the nits will be handled by applying a second round of the medication after 7 to 10 days, by which time, they’d have hatched. Nits can also be removed using a superb toothed comb.
Understanding concerning the life cycle of head lice puts one in a better place to deal with an infestation. If one youngster or family member has a case of head lice, all different members must even be checked for lice.