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1

Ogólnoustrojowe oraz lokalne mechanizmy immunologiczne stymulowane w przebiegu zakaźnego zapalenia oskrzeli kur

100%
Smialek M., Welenc J., Koncicki A.
Medycyna Weterynaryjna
|
2016
|
tom 72
|
nr 06
Infectious bronchitis (IB) is a highly contagious, viral disease of chickens that causes damage to the respiratory tract, kidneys, gastrointestinal and reproductive systems, as well as muscles. Despite the worldwide distribution of vaccines against IB, the outbreaks of this disease are recorded frequently. This review paper describes the mechanisms of the immune system response against both infectious bronchitis virus (IBV) and vaccine IBV, with special attention to the local upper respiratory tract immune mechanisms stimulated in the course of IB. CD8⁺ T cells as well as IgA⁺ and IgY⁺ B memory cells seem to play the most important role in protection against re-infection with IBV. The present paper describes in detail the stimulation of non-specific innate resistance factors and the underlying mechanism of IBV innate immunity breach, as well as the stimulation and acquisition of specificity and immune memory against IBV by immunocompetent cells after both infection and vaccination.
2

Znaczenie Aviadenowirusów w patologii indyków

76%
Smialek M., Gesek M., Tykalowski B., Welenc J., Milewska N., Koncicki A.
Polskie Drobiarstwo
|
2019
|
nr 02
3
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Three - step anti - aMPV IgA expression profile evaluation in turkeys of different immunological status after TRT vaccination

76%
Smialek M., Tykalowski B., Pestka D., Welenc J., Stenzel T., Koncicki A.
Polish Journal of Veterinary Sciences
|
2016
|
tom 19
|
nr 3
Maternally derived antibodies (MDA) don not protect turkeys against rhinotracheitis (TRT) but high MDA influences upper respiratory tract (URT) immunity stimulation after avian Metapneumovirus (aMPV) vaccination. Humoral immunity can not be considered as an indicator of protection against TRT, but specific antibodies inhibit aMPV replication and alleviate the course of TRT. Scarce reports indicate the role of IgA in protection against TRT. The aim of our study was to investigate the impact of MDA on stimulation, antigen specificity acquisition of B lymphocytes, and the production of specific IgA after TRT vaccination of turkeys. The results of our study indicate that MDA on the day of TRT vaccination causes disturbances at different levels of specific humoral immunity expression including antigen specificity acquisition of B IgA+ lymphocytes as well as production and secretion of IgA. Vaccine immunity against aMPV associated with sIgA is well expressed in birds not possessing MDA on the day of TRT vaccination, whereas it is inhibited in MDA+ birds. These results corroborate our previous findings and indicate that MDA could be responsible for TRT vaccination failure. These findings could explain the observed frequency of TRT field outbreaks despite aMPV vaccination of turkey flocks.
4

Pathomorphological changes in the alimentary system of Japanese quails naturally infected with Eimeria tsunodai

76%
Gesek M., Welenc J., Tylicka Z., Otwocka-Domagala I., Pazdzior K., Rotkiewicz A.
Bulletin of the Veterinary Institute in Puławy
|
2014
|
tom 58
|
nr 1
The aim of this study was to investigate pathomorphological changes in the duodenum, jejunum, ileum, and caecum of Japanese quails naturally infected with Eimeria tsunodai. Samples of the intestines were collected from 6-week-old cockerels and hens before laying and from laying quails aged 12, 24, and 48 weeks. The tissue sections were stained with haematoxylin and eosin, PAS method according to McManus, and Ziehl-Neelsen method. Morphometric and morphological analyses of coccidia revealed that Eimeria tsunodai was responsible for the infection. Different developmental stages of the coccidia were observed almost exclusively in the caecum, and they led to the complete damage of caecal mucosa. The main changes observed in the caecum involved mucosal damage, atrophy of the folds and crypts, and mucosal desquamation. No significant inflammation changes were detected. The degree of damage to caecal mucosa increased with age and the greatest damage was noted at the age of 48 weeks. Eimeria tsunodai infections occur in Japanese quails during the entire laying period. Different developmental stages of coccidia are responsible for total damage to caecal mucosa.
5

Manifestation of tumours in domestic animals in Warmia and Mazury (Poland) between 2003 and 2011

64%
Gesek M., Rotkiewicz T., Ostrocka-Domagala I., Pazdzior-Czapula K., Kozlowska A., Korzeniowska P., Grochowska K., Welenc J.
Bulletin of the Veterinary Institute in Puławy
|
2014
|
tom 58
|
nr 3
Samples of tumours collected during necropsies or received from veterinary clinics, as well as biopsies were analysed. The anah sis revealed 2259 tumours, including 1814 (80.30%) cases from dogs, followed by 295 (13.06% ) cases from cats, 79 (3.50%) cases from horses, and 71 (3.14%) cases from exotic animals. Skin and subcutaneous tissue (45% of dogs and 48% of cats), and mammary gland (23% of dogs and 29% of cats) were the most common location of tumours. Malignant forms prevailed in dogs (59%), cats (66%), and horses (89%). The analysis revealed interesting facts concerning the middle age of dogs and cats with tumours present with a peak in nine-year-old dogs and 10-12-year-old cats.
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