Frequency and polymorphism of Hassall’s corpuscles in normal thymus of nutria (Myocastor coypus)
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2009, Vol 2, Issue 2
Abstract
Thymus from three clinically healthy 12-month-old age nutria were collected and histologically processed. Microscopic examination showed that the thymus contains numerous Hassall’s corpuscles in various stages of development, from very small (10-15 μm), composed of 1-2 degenerate reticuloepithelial cells, to very large corpuscles (sometimes exceeding 500 μm). In nutria, the genesis of Hassall’s corpuscles is more rapid than in most mammals. The corpuscles showed extended polymorphism, from round corpuscles to very particular forms, even odd, in some cases. The degenerated reticulo-epithelial cells represent the starting point in Hassall’s corpuscles formation. They ensure the growth of Hassall’s corpuscles and their adhesion to the reticulo-epithelial network, as well as the binding of two or more adjacent corpuscles. In a more advanced stage, increase in size of the joint corpuscles reduce the separating spaces up to absence, resulting corpuscles that appear like entities of 5-10 joint corpuscles, in different stages of organization. The fast genesis of Hassall’s corpuscles and inter corpuscular binding by means of degenerate reticulo-epithelial cells causes the particular polymorphism of these corpuscles with nutria.
Authors and Affiliations
Viorel Miclăuş, I. Petrescu-Mag, Vasile Rus, Daniel Cadar, Liviu Oana, Ciprian Ober
Keywords
Related Articles
- EP ID EP83104
- DOI -
- Views 140
- Downloads 0
The effects of COX-Inhibitors (Diclofenac and Ibuprofen) on growth rate, mortality and sex reversal in Nile Tilapia (Oreochromis niloticus).
Several studies have been conducted to detect the direct effect of inhibiting the aromatase activity, the rate limiting enzyme that converts androgens to estrogens needed for ovarian differentiation in fish to overcome t...
Growth response and survival of Heterobranchus longifilis cultured at different water levels in outdoor concrete tank
Thirteen-day-old hatchery-raised fry obtained from hormonally-induced spawns of mature African catfish H. longifilis broodstock were introduced to three different water levels (0.35, 0.50 and 0.65 m) in four replicates i...
First record of Dogielius forceps (Monogenea) on Capoeta umbla (Pisces, Cyprinidae) to Turkey, from Murat Rive
In the present study, the genus Dogielius and Dogielius forceps Bychowsky, 1936 (Monogenea) was identified in branchial filaments of Capoeta umbla (Heckel, 1843) (Pisces: Cyprinidae) caught from Murat River for...
Fish community structure in rivers located in the Capanema municipality, Pará State, Brazi
Fish fauna species can show spatial and temporal patterns, which can be revealed by species association or species groups as well as by species preference to certain habitats. A study was conducted in 2010 in the Capan...
Trends in the marine aquarium trade: the influence of global economics and technology
The marine aquarium hobby is a global industry with trade chains on six continents. This industry is undergoing rapid changes in hobbyist preferences that are in part driven by global economies and technology. In an effo...