Poultry is poorly adapted to high temperature parameters of the environment, the greater the body weight and density of the poultry, the more pronounced the consequences of heat stress are. It is possible to avoid the negative effect of heat stress on the physiological parameters and health of poultry by using specific and non-specific drugs. The studies presented in the article were carried out according to generally accepted methods. As a result, it was found that under experimental conditions with artificially created heat stress for broiler chickens, the use according to the scheme: NSAIDs with the active ingredient acetylsalicylic acid and PRODACTIV®ACIDSE promotes the preservation of the main productive indicators.
Relevance. Currently, the pathology of the joints in broiler chickens remains relevant, especially when the bird is actively growing and gaining weight. Despite the many antibacterial drugs, the results of treatment do not always give a positive effect. This may be due to the properties of the pathogens themselves, which have adapted to resist antibiotics, including the formation of biofilms, limited penetration of the drug into the site of infection, which leads to a decrease in the optimal concentration of the active substance at the site of the pathological process.Methodology. The production experiment was carried out at a poultry farm for the production of poultry meat with cage keeping of broiler chickens of the Соbb 500 cross. In the phase of active growth of broiler chickens, based on clinical, laboratory and histological studies of previous batches of growing broiler chickens, «Spelink®-660» was introduced into the treatment regimen for a new batch of poultry.Results. Production experience has shown that the consistent introduction of the drug with the active ingredient enrofloxacin, colistin sulfate and «Spelink®-660» into the treatment regimen for broiler chickens in the first decade of growing allowed to achieve the best zootechnical indicators and reduce the mortality of birds during the fattening period due to joint pathology.
Relevance. The degree of development of heat stress in poultry is associated with the influence of a number of factors: the value of the peak temperature, the duration of its influence on broiler chickens, air humidity in the poultry house, ventilation, age and live weight of the birds. Based on the heat load on the body of the bird, feed consumption, productivity and quality of the products obtained are reduced to varying degrees. Thermal load exceeding adaptive capacity can be fatal.Methods. To determine the degree and depth of the effect of heat load on the body of a bird, production data from the leading poultry farms of the Chelyabinsk and Belgorod regions were studied. A production experiment on the correction of heat stress was carried out in the conditions of poultry houses with cage keeping of broiler chickens. The birds of the experimental group were fed a solution of the drug "PARATERM" through medicators for 5 days before slaughter, at a dose of 70 mg/kg of body weight. On the 39th day, the birds were slaughtered.Results. Against the background of the use of the drug "PARATERM", the safety of birds in the experimental group increased by 1.6% compared to the control group, the mortality during transportation decreased by 6.6 times. Against the background of the accumulation of protein mass in the poultry meat of the experimental group, there was an increase in the amount of moisture and a decrease in amount oflipids. The content of heavy metals and toxic elements in the poultry meat of the experimental groups did not exceed the permissible level, that indicates the safety of the meat raw materials obtained. Statistically significant changes in the meat of the experimental group were observed in the content of copper and zinc.
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