НАУЧНО-ПРАКТИЧЕСКАЯ КОНФЕРЕНЦИЯ С МЕЖДУНАРОДНЫМ УЧАСТИЕМ
154 Проблемы биологии и медицины, 2018, №3,1 (103)
antibiotic-resistant, are located under the microscope as separate rods, and at 37 ° C, the virulent (PYV +) Y.enterocolitica
short chains of rods, whereas those lacking a virulence plasmid (control) are arranged in the form of separate rods. When
culturing, it was noted that antibiotic-resistant pathogens of intestinal yersiniosis show associated pYV signs of calcium-de-
pendent growth, which consists in limiting growth with a deficiency of calcium ions in the medium with a deficiency of calcium
ions in the medium at 37 ° C. It is known that Y.enterocolitica, and in general pathogens yersiniosis, much slower than the rate
of reproduction, in the vast majority of cases, colonies are formed on the second day of growth on physical nutrient media.
Virulent cells of the causative agents of intestinal yersiniosis (28 strains) during cultivation at 37 ° C on the medium formed
colonies, whereas the cells for the virulence plasmids (14 strains) exhibited a calcium dependence of growth, this phenomenon
disappeared in the environment of exogenous nucleotide triphosphates (containing calcium) and especially when the incubation
temperature (27 ° C) is lowered, which is usually used in conventional practical laboratories. In our studies it has been shown
that one of them can be changed, because it is characteristic only of pathogens of yersiniosis, which at 37 ° C on native nutrient
media of the colony is significantly smaller than at 27 ° C and not more than 1 mm in diameter. When cultivated on basic nutrient
media, antibiotic sensitive strains of Y.enterocolitica that did not contain plasmid (28 strains) formed larger, transparent flat
colonies at 37 ° C and they exhibited reduced virulence: culturing on the same media at 27 ° C to similar dissociation leads. In
contrast, the strains of the experimental group (pYV +) formed colonies of significantly smaller diameter (at 37 ° C) than at 27
° C growth and not exceeding 1 mm in diameter. Results. It has been established that the phenotypic features of Yersiniosis
pathogens can be distinguished from the cultural and morphological properties of antibiotic resistance and sensitivity of Y.en-
terocolitica, which play an important role in the diagnosis of diseases. So, antibiotic-resistant strains of Y.enterocolitica can be
recognized under a microscope, which can be obtained as separate rods. Antibiotrocoresistant strains of Y.enterocolitica, in
contrast to non-resistant strains, exhibited growth, formed colonies of significantly lesser dimension, not exceeding 1 mm in
diameter. These properties are more evident when the strains studied are cultivated at 37 ° C.
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