Open AccessViability of oocist eimeria of turkeys under exposure to Mycadez
Author(s) -
P. V. Lyulin
Publication year - 2020
Publication title -
veterinarìâ, tehnologìï tvarinnictva ta prirodokoristuvannâ
Language(s) - English
Resource type - Journals
eISSN - 2663-5542
pISSN - 2617-8346
DOI - 10.31890/vttp.2020.06.09
Subject(s) - eimeria , veterinary medicine , litter , feces , moisture , biology , petri dish , infestation , desiccation , humidity , zoology , microbiology and biotechnology , ecology , chemistry , botany , medicine , meteorology , physics , organic chemistry
The sanitary and parasitic state of poultry houses affects the infestation of turkeys with eimeria. The increased humidity and temperature of the surface layers of the litter, which contributes to the sporulation of oocysts and the infection of young birds with eimerious invasion plays an important role. Therefore, while developing control and prevention measures, it is necessary to take into account the permissible standards for litter moisture and ambient temperature. It is well known that the viability of eimeria oocysts largely depends on the moisture content of the substrate, temperature and the presence of air. However, the influence of these factors and the effect of Mikadez on the viability of pathogens of eimeria oocysts have not been fully studied. Research object. Freshly excreted turkey feces containing oocysts of eimeria E. meleagridis (37.5 %); E. adenoids (25.7 %); E. gallopavonis (26.1 %), E. meleagrimitis (7.3 %); E. innocua (3.4 %) and Micadez litter desiccant were studied. Objective. To study the effectiveness of the litter desiccant Mikaedz TU U 08.1 - 36613759 - 002: 2013 on turkey eimeria oocysts in the environment. The studies were carried out in the scientific laboratory of the Department of Parasitology of the Kharkiv State Zooveterinary Academy, using generally accepted parasitological and microscopic research methods. Material for the study was taken from turkeys experimentally infested with eimeriosis. Feces were placed in Petri dishes without bedding and with bedding containing Mikadez, kept in a thermostat at a temperature of +20 ° C, 70 % relative humidity for 10 days. The loss of moisture in feces was monitored by weighing, and the viability of eimeria oocysts microscopically, counting the number of non-sporulated and sporulated oocysts in the Goryaev chamber were determined. With a decrease in fecal moisture to 31.3 ± 1.22 % ‒ 40.7 ± 0.51 %, the viability of eimeria oocysts reduced, which indicates the leading role of moisture in the sanitizing process. At a moisture content of 30 % in the substrates (feces), Eimeria oocysts lose their viability, and the Micadez bedding desiccant promotes the absorption of moisture from feces and accelerates the death of Eimeria oocysts in turkeys.