Inhibitory properties of disinfectants on the sporogony of Eimeria tenella (Protista, Eimeriidae)
Abstract
The protozoa of kingdom P rotista are widespread pat h ogens of gastrointestinal protozoal diseases in chickens and cause si g nificant economic losses to farms. Prevention includes a set of measures to treat poultry with effective drugs, and disinfect the environmental objects using modern, safe and beneficial means. For this purpose, it is recommended to use disinfectants that have been tested for their disinfestation effect. The aim of the research was to investigate the disinfestation effect of chemicals on the process of sporulation of Eimeria tenella oocysts isolated from chickens in laboratory conditions. It was found that the disi n fectants "Virosan" (active substances – alkyldimethylbenzylammonium chloride and glutaraldehyde) and "Yoderin" (contains iodophores) had disinvasive properties, but their indicators of inhibitory action against sporogony of E. tenella oocysts were not the same. The most effective was the agent alkyldimethylbenzylammonium chloride and glutaraldehyde mixture, with a 100% inhibitory effect when used at a 0.5% concentration and exposure of 150 minutes. At lower exposures and concentrations, its indicators of inhibitory action ranged within the following limits: at 0.1% concentration to 57.0%, at 0.25% concentration to 84.5%. The inhibitory effect of the iodophor-based disinfectant was lower and varied depending on the exposure (from 30 to 150 min) within the following limits: at 0.5% concentration to 35.7%, at 1.0% concentration to 68.2%, at 2.0% concentration to 93.1%. In addition to stopping the development of Eimeria oocysts, the disinfectants induced changes in their morphological and metric indicators. Metric indicators of oocysts under the action of disinfectants were characterized by lower values of their width (by 4.8–8.7%), and under the action of the iodophor-based agent , by a decrease in the ratio of length / width of oocysts (by 11.0%). The obtained results of the inhibitory action of the disinfectants present prove the possibility of using these agents to combat and prevent eimeriasis in chicken s .References
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