PRIMORDIAL FORMS OF PEYER'S PATCHES DEVELOPED IN ALBINO RATS' SMALL INTESTINE AFTER ADMINISTRATION OF BROAD-SPECTRUM ANTIBIOTIC.

Experimental modeling of dysbacterioses associated with antibiotics is an urgent issue of morphological studies. The present paper was aimed at the detection and study of the primordial forms of Peyer's patches developed in the small intestine of albino rats after administration of clarithromycin. 30 mature albino male rats weighing 200.0 ± 20.0 g were involved into the experiment. Antibiotic was administered to the rodents as a supplement to food during their two-meals-a-day feeding. Areas of the small intestine with Peyer's patches have been studied. Serial paraffin sections have been analyzed using the "Konus" light microscope. Morphometric characteristics of the tissue structures were obtained using the Sigeta X 1 mm / 100 Div.x0.01mm stage micrometer. Administration of clarithromycin caused a significant increase in the amount of Peyer's patches, the appearance in the mucous membrane of newly formed aggregated lymphoid nodules, being the primordial forms of Peyer's patches, the appearance of which can be explained by only one factor, namely, impaired microbiocenosis in the small intestine under the influence of the broad-spectrum antibacterial drug, clarithromycin, which has immunotropic effect.