Comparative economic efficiency of using pharmacological agents for the stress prevention in the course of immunization of birds against reovirus tenosynovitis
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Kuupäev
2020
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
This article describes the results of studies on the definition and comparative evaluation
of the effectiveness of using SPAO-FA (stress protector antioxidant – feed additive) and SPAOcomplex pharmacological preparation (stress protector antioxidant – complex preparation for
birds) for the prevention of vaccine stress during immunization of birds against reovirus
tenosynovitis. These preparations were used during 5 days (3 days before vaccination, on the day
of vaccination and one day after vaccination) at the dose of 185 mg kg-1 body weight: SPAO-FA
was given as a part of compound feed, SPAO-complex – with water. Stress prevention in chickens
of the parent flock provides equally high level of protection of birds from a field virus, a causative
agent of reovirus tenosynovitis: it reduces the development of a protective level of antibodies by
7 days. Using SPAO-complex contributed to the increase in antibody titers by a factor of 2.6, and
to the decrease in the coefficient of variation by the term of monitoring immunity stress by 25.7%.
Using SPAO-FA increased antibody titers by 1.6 times, but had no significant effect on
vaccination homogeneity. Vaccination index that should be high in the case of successful
vaccination was 3.5 times higher for SPAO-complex in comparison with the basic diet; this for
SPAO-FA was 1.6 times higher. Positive effect of anti-stress therapy influences the livability of
chickens which was 3.5% higher with SPAO-complex, 0.79% higher – with SPAO-FA; bird live
weight and the yield of day-old chicks were also higher in comparison with the basic diet by 6.44
and 0.88%, and 4.22 and 0.55%, respectively. Cost-effectiveness of using SPAO-FA per RUR of
costs amounted to 180.09 RUR, for SPAO-complex, this parameter amounted to 435.86 RUR.
Kirjeldus
Märksõnad
poultry farming, vaccination, reovirus tenosynovitis, antibody titers, coefficient of variation, vaccination index, cost-effectiveness, yield of chicks, articles