[Histomorphometric and histological investigations of the morphometric effects of furazolidone on spermatogenesis in mature rats].

The antispermatongenic effects of furazolidone on the testes of mature Wistar rats were investigated using histological and morphometric methods. The sections showed a varying degree of depopulation of the germinal epithelium, a shrinking and a deformation of the Tubuli contorti, and an enlargement of the intertubular lymphatic sinuses. The strain led to a standstill in the spermatogenesis at the primary-spermatocyte stage. After administering furazolidone, the following results could be seen: a weight loss of up to 42.1% and a decrease in testes volume by up to 30.2%; a decrease in the volume of the nuclei of the Leydig-cells by up to 51.6%; a reduction in the diameter, perimeter and area covered by Tubuli seminiferi contorti of up to 33.5%, 30.8%, and 53.4%, respectively; an increase in the number of Tubuli seminiferi contorti per mm2 by up to 44.8%; a decrease in the percentage of Tubuli seminiferi contorti of the total testes tissue by up to 39.1%.