Assessment of phagocytic activity of tilapia blood cells under hormone-induced stress

УДК 639.215.2:574.24./625
Abstract: 

The paper presents an assessment of the phagocytic ability of blood cells of Nile tilapia Oreochromis niloticus L. under the hormonal induction of stress with range of duration. It has been revealed that Staphylococcus aureus is phagocytosed by leukocytes, platelets, and erythrocytes of tilapia blood in direct smears. The phagocytic capacity of the cells has been quantified. It has been found that long-term exposure to stress has an immunosuppressive effect on the phagocytic activity of leukocytes and an immunostimulating effect on the phagocytic activity of erythrocytes (60-minute incubation) by the end of the experiment in comparison with other groups. Short-term exposure to stress increases the activity of leukocytes and decreases the activity of erythrocytes (60- minute incubation) for 7 days after exposure.

Assessment of phagocytic activity of tilapia blood cells under hormone-induced stress

УДК 639.215.2:574.24./625
Abstract: 

The paper presents an assessment of the phagocytic ability of blood cells of Nile tilapia Oreochromis niloticus L. under the hormonal induction of stress with range of duration. It has been revealed that Staphylococcus aureus is phagocytosed by leukocytes, platelets, and erythrocytes of tilapia blood in direct smears. The phagocytic capacity of the cells has been quantified. It has been found that long-term exposure to stress has an immunosuppressive effect on the phagocytic activity of leukocytes and an immunostimulating effect on the phagocytic activity of erythrocytes (60-minute incubation) by the end of the experiment in comparison with other groups. Short-term exposure to stress increases the activity of leukocytes and decreases the activity of erythrocytes (60- minute incubation) for 7 days after exposure.

The influence of cortisol on some immunological parameters of carps

УДК 639.2:574.24:574.625
Abstract: 

This paper presents an assessment of changes in some indicators of the immune system in the control and experimental group of carp under the influence of endogenous cortisol. It was found that when the level of cortisol increases the activity of cellular immunity in fish created by leukocytes increases as well. Other indicators of the immunological status decrease with the increase of this hormone.

 

 

The influence of cortisol on some immunological parameters of carps

УДК 639.2:574.24:574.625
Abstract: 

This paper presents an assessment of changes in some indicators of the immune system in the control and experimental group of carp under the influence of endogenous cortisol. It was found that when the level of cortisol increases the activity of cellular immunity in fish created by leukocytes increases as well. Other indicators of the immunological status decrease with the increase of this hormone.

 

 

Blood fibrinogen dynamics in fish under stress

УДК 639.2:574.24:574.625
Abstract: 

The paper presents the research results of blood fibrinogen in carps under stress. It is established that the coagulation processes have accelerated under hypoxic stress by the 4th day of the experiment.

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