Seasonal influence on biochemical blood parameters in males of Californian rabbit breed

Duda, Y. V.; Prus, M. P.; Shevchik, R. S.; Koreyba, L. V.; Mylostyvyi, Roman; Samoilіuk, V. V.

doi:10.15421/2020_197

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…Постановка проблеми та аналіз останніх досліджень. На стійкість організму до різних захворювань впливає низка чинників: вік тварин, особливості годівлі, умови утримання, кліматичні умови тощо [1][2]. Імунна відповідь господаря на паразитарні інвазії складна й різноманітна та включає різні аспекти як клітинного, так і гуморального імунітету.…”

Section: паразитарні хворобиunclassified

“…Однією з актуальних проблем за вирощування кролів є зниження їх резистентності, що зумовлено значним поширенням еймеріозу як в зарубіжних країнах [7-9], так і Україні [10][11]. Еймеріоз (кокцидіоз) кролів -паразитарне захворювання, яке навіть за субклінічного перебігу завдає значних економічних збитків, що зумовлено затримкою росту та розвитку тварин, зниженням якості отриманого від них м'яса, а також загибеллю кролів [2].…”

Section: паразитарні хворобиunclassified

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Factors of cell immunity under exposure to the Eimeria spp

Duda

Prus

2022

Nauk. vìsn. vet. med.

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One of the actual problems in farming rabbits is a decrease of their resistance, that is often conditioned by the availability of eimeriosis pathogens, which is significantly widespread both in foreign countries and in Ukraine. A lot of researchers studied the particular qualities of the development of prothymeriosis immunity, the role of lymphocyte populations, and the antigenic composition at various stages of development of eimeria. The aim of the research was to study the influence of the association of pathogens Eimeria sрp. with different levels of invasion intensity on indicators of cellular immunity of rabbits. For the experiments, analogue groups of male rabbits of the Californian breed aged 3-5 months were selected. During scatological research, we have found that rabbits with eimeriosis had different levels of invasion intensity (II), according to which the animals were divided into three groups: I - low level of invasion intensity (II = 1838.89 ± 1114.68 oocysts in 1 g of feces), II - medium level (II = 39787.50 ± 13422.34 oocysts in 1 g of feces) and group III - high level (II = 88578.57 ± 17776.32 oocysts in 1 g of feces). In the blood of all rabbits with eimeriosis (association of the pathogens Eimeria magna, E. media, E. perforans, E. stiedae) there were leukocytosis, absolute lymphocytosis against the background of relative segmented neutropenia regardless of the intensity of invasion. At the same time, in the blood of animals of all experimental groups, in comparison with the control, the number of eosinophils was significantly (p <0.001) higher in absolute and percentage (p <0.05) values. The same pattern has been found for basophiles. The absolute number of T- and B-lymphocytes, T-helpers and T-active lymphocytes was significantly higher compared to a low percentage of O-lymphocytes. So, if sick rabbits have pathogens of Eimeria spp., the defense mechanisms of innate and adaptive immunity with the participation of blood cells are activated. With an increase in the intensity of eimeriosis invasion in the blood of sick animals, the number of leukocytes, eosinophils and basophils increases against the background of a decrease in the percentage of segmented neutrophils. In the blood of rabbits with eimeriosis, a higher percentage of B-lymphocytes was noted, which had a weak positive correlation (r=0.28) with the level of invasion intensity, and a smaller number of O-lymphocytes. Key words: eimeriosis, leukogram, T-lymphocyte, B-lymphocyte, О-lymphocyte, T-helper, T-suppressor, T-active lymphocyte.

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Section: паразитарні хворобиunclassified

Factors of cell immunity under exposure to the Eimeria spp

Duda

Prus

2022

Nauk. vìsn. vet. med.

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“…IE was, respectively, 36.27% and 34.12% (on average 35.20%). The number of parasites in the external environment, as well as changes in the physiological state of the body and the functioning of the immune system, depend on the season (Duda et al, 2019;Duda et al, 2020). During 2014-2020, in the conditions of farms of the Zaporizhzhia and Dnipropetrovsk regions, during coproovoscopic studies, seasonal patterns of infection of rabbits with Passalurus ambiguus were revealed (Table 2).…”

Section: Note: Ll -Significant (P<001) Difference With the Specified ...mentioning

confidence: 99%

Seasonal and age dynamics of passalurosis invasion of rabbits and pathological and histological changes in this nematodosis

Prus¹,

Duda²,

Koreyba³

et al. 2022

Scientific Horizons

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The most common nematode in rabbits is passalurosis, and climate change in Ukraine in recent decades has altered the epizootic manifestation of this parasitosis, which predetermines the relevance of this study. Therefore, the purpose of this paper was to establish the epizootic situation regarding the passalurosis invasion and to investigate the pathological and histological changes in both the large and small intestines of rabbits with a high degree of damage by Passalurus ambiguus. The study used the McMaster method, the improved method of incomplete helminthological dissection according to K.I. Scriabin Private households in the Polissia zone of Ukraine were found to be the most vulnerable in terms of passalurosis infestation, where 37.70-41.67% of sick rabbits were registered. In the seasonal aspect, the highest infection of animals was found in winter (invasion extensiveness (IE) was 35.27%), with a peak in January (IE = 35.29%), the lowest – in summer (IE = 25.79%). Rabbits aged 1 to 2 years had the highest incidence of the pathogen Passalurus ambiguus (82.76%). It was found that with a high degree of damage (invasion intensiveness (II) – 2446.67 ± 422.11 eggs in 1 g of faeces) rabbits with passalurosis had catarrhal and catarrhal-haemorrhagic inflammation, swelling of the mucous membrane of the intestines with dotted or striped haemorrhages. The destruction of the villi of the mucous membrane of the small, caecum, and colon, crypt cells and infiltration by lymphocytes and monocytes, severe swelling of the submucosal base and muscle membrane, and a state of granular dystrophy of all smooth muscle cells of the muscle membrane were established. The detection of seasonal, age-related, and pathological-histological changes in rabbits with passalurosis will allow controlling the degree of infection of animals and promptly taking effective countermeasures, which predetermines the practical value of this study

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