Vol. 44, No. 3, 2000
THE FORMATION OF NEW SEMINIFEROUS TUBULES AFTER THE CURETTAGE OF THE TESTICULAR PARENCHYMA IN YOUNG RAMS
Vrzgulová, M., Danko, J.
University of Veterinary Medicine
Komenskeho 73
041 81 Košice
The Slovak Republic
This paper was originally presented at the international symposium organized on the occasion of the 75th anniversary of the birth of Prof. Peter Popesko, M.V.D., D.Sc., held at The University of Veterinary Medicine, Košice on 2 June 2000
Summary
This paper presents the results of studies after unilateral curettage of the seminiferous parenchyma in 8 young Merino rams, aged 2-3 months. In the experimental animals the contralateral testis was blocked by ligation of the testicular artery. The findings have been evaluated by histological and submicroscopical methods.
When spermiogenic cells are entirely missing the organism utilizes the reservoir of germinal material which is contained in the tunica albuginea of the testis in the form of solitary or scattered residues of seminiferous tubules in young animals.
Regeneration of the seminiferous parenchyma is of a temporary nature, culminating in the experimental group of animals at 9-10 months after curettage. At later stages, regression of the rebuilt tissue occurred. As confirmed by submicroscopical findings, the endeavour of the organ to maintain the reproductive ability of the animal is entirely lost in the last period (16 months) of the experiment.
Key words: young ram; testis; curettage; spermatogenesis; regeneration
References
Folia Veterinaria / 2000