Reaction of the populations of disease causative agents in animals to the influence of Sagittaria Sagittifolia l. intravital excretions
Journal Title: Біологія тварин - Year 2014, Vol 16, Issue 1
Abstract
Outbreaks of infectious diseases, such as erysipelas and leptospirosis, which cause significant economic damage to businesses and households, are registered in Ukraine annually. The ability of pathogen agents of these diseases (Erysipelothrix rhusiopathiae bacteria and Leptospira interrogans spirochaetes) to survive in the environment objects and circulate in ecosystems for a long time makes fighting against these infectious agents and disease prevention extremely difficult and costly. The density of population and the duration of causative agents of infections in the environment objects are significantly influenced by biotic factors and plants in particular, which are a powerful source of biologically active substances in the ecosystem. It has been established by the research that root diffusates of arrowhead Sagittaria sagittifolia have a stimulating effect on the population of E. rhusiopathiae bacteria when diluted in 1:10 and 1:100 proportions. Erysipelothrix density in the experimental samples was higher at 177.86 % and 59.87 % respectively than in the control sample. When diluted in 1:1000 and 1:10000 proportions, intravital excretions of arrowhead did not have a clear impact on the populations of erysipelas causative agent. The experiments, studying the influence of arrowhead root diffusates on the density of the populations of leptospirosis pathogens, were conducted on the cultures of 7 serological strains of L. interrogans. The analysis of the results showed that intravital excretions of arrowhead have a vivid depressing effect on the experimental leptospira cultures. Serological variants of L. interrogans differed by the degree of sensitivity to the influence of S. sagittifolia excretions, and the rate of inhibition of spirochaetes populations ranged from 25.53 % to 82.86 %. In the conditions of coastal and water ecosystems, S. sagittifolia plants demonstrate an allelopathic reaction to the populations of pathogenic E. rhusiopathiae and L. interrogans bacteria, resulting in the topical type of ecological relations between these species.
Authors and Affiliations
O. M. Zhukorsky, O. V. Gulay, V. V. Gulay, N. P. Tkachuk
Keywords
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