In general, the treatment recommended by Wellman for the bites of Ornithodoros moubata will prove helpful. It consists of prolonged bathing in very hot water, followed by the application of a strong solution of bicarbonate of soda, which is allowed to dry upon the skin. He states that this treatment is comforting. For severe itching he advises smearing the bites with vaseline, which is slightly impregnated with camphor or menthol. Medical aid should be sought when complications arise.
The Dermanyssidæ are Gamasid mites which differ from others of the group in that they are parasitic on vertebrates. None of the species normally attack man, but certain of them, especially the poultry mite, may be accidental annoyances.
Dermanyssus gallinæ ([fig. 51]), the red mite of poultry, is an exceedingly common and widespread parasite of fowls. During the day it lives in cracks and crevices of poultry houses, under supports of roosts, and in litter of the food and nests, coming out at night to feed. They often attack people working in poultry houses or handling and plucking infested fowls. They may cause an intense pruritis, but they do not produce a true dermatosis, for they do not find conditions favorable for multiplication on the skin of man.
Tarsonemidæ
The representatives of the family Tarsonemidæ are minute mites, with the body divided into cephalothorax and abdomen. There is marked sexual dimorphism. The females possess stigmata at the anterior part of the body, at the base of the rostrum, and differ from all other mites in having on each side, a prominent clavate organ between the first and second legs. The larva, when it exists, is hexapodous and resembles the adult. A number of the species are true parasites on insects, while others attack plants. Several of them may be accidental parasites of man.
