skin : scabies 3 etiology

Etiology
Scabies caused by Sarcoptes scabiei. Sarcoptes scabiei including the phylum Arthropoda, class Arachnida, order Ackarima, Sarcoptes super family. Sarcoptes scabiei derived from the Greek, which means that sarx koptein meat and that means cutting, and also from the Latin word meaning scratched scabere (Cordoro, 2008). Scabies who attack people of Sarcoptes scabiei variety hominis. In addition there is S. scabiei others, such as the goats and pigs. Sarcoptes scabiei var hominis was found by Italian biologist named Diaconti Cestoni in the 18th century (Handoko, 2007).
In morphologies S. Mites Scabiei is small, oval, convex back and abdomen flat. Mites are translucent, white, dirty, and no eyes. Female mites have a larger size than males, it ranges from 0.3 to 0.4 mm, where the male mites only about half the size of it. Form of adult mites have four pairs of legs, two pairs of front legs as a means to stick, and two pairs of legs on females both ends with hair, was on the third leg of male couples end up with hair and a fourth as a adhesive (Handoko, 2007).
Movement of mites in the skin causing a very itchy feeling and led to similar reactions with allergic reactions. Produced eggs produce allergic response that causes itching feeling better (Morgellons, 2007).
Skabies only occurs when there is S. scabiei males and females into the skin. After a copulation, S. scabiei males will die and the females will continue to live. Then the female mites enter the skin and create a tunnel (tunnel) in the stratum korneum speed from 1 to 5 mm / day. In these tunnels female mites will lay eggs 3 to 4 eggs a day until you reach number 40 or 50 grains. Fertilized female forms can live a month. Eggs will hatch, usually within 3 - 5 days. And the larvae have three pairs of legs. After 2 - 3 days, the larvae become nymphs with 4 pairs of legs. Life cycle from egg to adult form takes between 8 to 12 days. Adult mites will come out of the tunnel to find his partner (the event usually occurs at night). If mites are not in the skin, so he can live in clothing, sheets, or towels for 2 or 3 days, so in this period that may arise reinfection (Rikyanto, 2001).