[The variability of the itch mite Sarcoptes scabiei De Geer (Acariformes, Sarcoptidae) in connection with the epidemiology of scabies. A rank system for the variability of the chaetoid integument in females].

The variability of the naked section of the chaetoid cover of itch mite Sarcoptes scabiei De Geer females was studied. The sample used was divided into 5 grades by the number of undeveloped chaetoids. The structures surrounding the naked section, its size and dimensions of the female body were analysed in each grade of specimens. Such grade scale for describing the chaetoid cover proved to be useful for comparative analysis of human and animal forms of itch mite.