[137Cs distribution and accumulation in organs and tissues of sheep in the event of chronic consumption of contaminated fodder in the area of the Chernobyl NPP accident].

The regularities of 137Cs distribution and accumulation in organs and tissues of sheep on a farm located in the Chernobyl accidental zone were experimentally estimated. The distribution pattern of 137Cs concentration in organs and tissues is found to depend on the duration of the radionuclide uptake with the ration. During the first 24 h the highest 137Cs concentration is reported in the parenchymal organs; starting from day 30 muscular tissue and kidneys rank first, whereas in the other organs and tissues 137Cs concentration is 1.5-2 times lower. By 137Cs content and accumulation rate the study organs are arranged in a declining order as follows: muscles > > skin > liver > kidneys > heart > spleen. The mathematical models were devised describing the dynamics of increasing with time in 137Cs concentration in muscles, liver and skin. The methodology is suggested for the prediction of levels of 137Cs contamination of the muscular tissue of sheep. The time periods were regulated for sheep feeding with 137Cs contaminated fodder that ensure the production of mutton the radionuclide concentration in which meets the sanitary-hygienic standards.

[Mucosal morphology in the latent form of terminal ileitis in children based on biopsy data]. / Morfologiia slizistoi obolochki pri latentnoi forme terminal'nogo ileita u detei po dannym biopsii.

Morphological study of serial section biopsies from 22 children was made to develop new diagnostic criteria of a latent form of terminal ileitis. The following changes were observed: fibroblastic reaction around the lymphoid follicles, degenerative changes of enterocytes close to the lymphoid follicles; disruption of basal membrane over the lymphoid follicles; penetration of lymphoid cells into the intestinal lumen and their adhesion to the apical membrane of enterocytes; neuroma-like structures as an issue of productive vasculitis. The frequency of the symptoms above 62% does not depend on the sex, age and treatment method.