[The incidence of Hymenolepis nana infestation in Dolj County].
The present paper reports on the incidence of the Hymenolepis nana cestode in the Dolj County, in 45,725 cases, in the polyclinic and hospital, between 1985 and 1987, with several variation, on age-groups and as a function of sex. Our remarks, made during this period and on the whole group of the subjects investigated in the polyclinic and hospital show the low incidence, of 2.34% of Hymenolepis nana, versus 97.16%, a value found for the following parasites investigated: Giardia lamblia, Entamoeba coli, Enterobius vermicularis, Ascaris lumbricoides and Trichuris trichiura. Mention should be made that this incidence has been increasing since 1985, when it recorded 28.21%. In 1986 this value reached 36.63%, and in 1987 it remained almost the same, 35.25%. Analysis of the seasonal evolution of hymenolepiasis shows a maximum during autumn and a minimum during winter in the polyclinic, and also during spring in the hospital. Increase or diminution of the incidence of this parasitosis, irrespective of season, is a function of the age group and of the children's sex: the male sex was is prevalent in the hospital and the female sex in the polyclinic (in 1987). The greater incidence of Hymenolepis nana in the adult requires the investigation of his immunity state.