UDC 579.842.14 / 62
DOI: 10.36871/vet.zoo.bio.202110003
Authors
Sergei V. Burlakov
Anna V. Burlakova
All-Russian State Center for Quality and Standardization of Medicines
for Animals and Feed (VGNKI), Moscow, Russia
Andrei V. Kapustin
Pavel N. Shastin
Aleksei I. Laishevtsev
All-Russian Institute of Experimental Veterinary named after K. I. Scriabin and
Ya. R. Kovalenko, Russian Academy of Sciences, Moscow, Russia
Abstract
The effect of vaccination against salmonellosis on the morphological composition of the blood of broiler turkeys was studied. The dynamics of seroconversion of antibodies to S. enteritidis, S. typhimurium and S. infantis were analysed. The results obtained, which demonstrate an increase in hematocrit, hemoglobin level, average hemoglobin concentration in erythrocyte (MCHC), average erythrocyte volume and average hemoglobin content in erythrocyte (MCH), indicate an increase and optimization of key quantitative indicators of blood cells of a group of birds, two times immunized against salmonellosis. These positive indicators will allow further assessment of the effectiveness of immunization and the adequacy of immunological preparations when used in the turkey herd. This approach will reduce the time and cost of consumables as well as reduce the need for the use of sophisticated equipment when carrying out an express assessment of the parameters of the effectiveness of immunization and the quality of biological preparations. The levels of erythrocytes, anisocytosis, pseudo-eosinophils, monocytes, basophils, lymphocytes demonstrate the absence of a negative effect of double immunization, which allows to consider these indicators as neutral ones. Experience has shown that the use of a salmonellosis vaccine induces sufficient immunity in turkeys to manage the risks of Salmonella infection with S. enteritidis, S. typhimurium and S. infantis.
Keywords
turkeys, poultry, immunization, vaccine, assessment, analysis, risk control of salmonella infection, salmonellosis, toxic infection, blood, immunological parameters, morphological parameters, blood count
