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Influence of non-infectious pathologies and biochemical status of laying hens on egg quality

Abstract

The influence of non-infectious pathologies (cannibalism and cloacitis) and biochemical status of laying hens on egg quality was studied. The studies were conducted on hens of cross Highsex Brown. The content of total immunoglobulins in the blood serum of laying hens exceeds the normal limits (norm is 7-10), which indicates the absence of immunodeficiency and tension of the immune system, especially in clinically healthy poultry. The lysozyme level of all groups of laying hens is below the physiological limits of the norm (norm is 3.5 - 5). The glucose content in the blood serum of the studied groups was within the normal range. The ratio of the egg components in all groups was within normal limits. All the tested eggs do not meet the regulatory indicators for the level of controlled vitamins. However in the eggs of clinically healthy poultry vitamin A is higher than in the ones with cannibalism and cloacitis by 17% and 33% respectively. We also note the superiority of a healthy poultry against those suffering from canibalism by vitamin E, but all three groups do not meet the norm (the level of its content in the yolk should be 25-40 gg/g). Vitamin B2 level in all groups exceeds the norm (2-3 μg/g), and the level of carotenoids of all groups is below the norm (18-20 μg/g). We believe that the imbalance of vitamins in the yolk is a consequence of the clinical condition of the poultry, as well as insufficient content of the relevant components in the diet of the poultry. When selecting eggs for incubation it is recommended to exclude the possibility of getting the eggs from laying hens with non-infectious pathology of cannibalism and cloacitis into the incubator.

About the Authors

V. I. Kotarev
All-Russian Research Veterinary Institute of Pathology, Pharmacology and Therapy of Russian Academy of Agricultural Sciences
Russian Federation


L. V. Lyadov
All-Russian Research Veterinary Institute of Pathology, Pharmacology and Therapy of Russian Academy of Agricultural Sciences
Russian Federation


E. V. Pronina
All-Russian Research Veterinary Institute of Pathology, Pharmacology and Therapy of Russian Academy of Agricultural Sciences
Russian Federation


G. V. Vlasova
All-Russian Research Veterinary Institute of Pathology, Pharmacology and Therapy of Russian Academy of Agricultural Sciences
Russian Federation


E. E. Morozova
All-Russian Research Veterinary Institute of Pathology, Pharmacology and Therapy of Russian Academy of Agricultural Sciences
Russian Federation


S. Y. Popov
All-Russian Research Veterinary Institute of Pathology, Pharmacology and Therapy of Russian Academy of Agricultural Sciences
Russian Federation


References

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Review

For citations:


Kotarev V.I., Lyadov L.V., Pronina E.V., Vlasova G.V., Morozova E.E., Popov S.Y. Influence of non-infectious pathologies and biochemical status of laying hens on egg quality. Legal regulation in veterinary medicine. 2018;(4):183-186. (In Russ.)

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ISSN 2782-6252 (Print)