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Histomonosis - an existing problem in chicken flocks in Poland.

Dolka B, Żbikowski A, Dolka I, Szeleszczuk P - Vet. Res. Commun. (2015)

Bottom Line: Recently an increasing number of cases have been reported in chicken flocks in Europe resulting in economic losses.It is thought that this situation is predominantly caused by a complete withdrawal of the effective antihistomonals in the EU.Additionally, the absence of systemic diffuse histomonads and lack of Heterakis gallinarum, caecal worm eggs in faecal samples were noted.

View Article: PubMed Central - PubMed

Affiliation: Department of Pathology and Veterinary Diagnostics, Faculty of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159c St., 02-776, Warsaw, Poland, beata_dolka@sggw.pl.

ABSTRACT
Histomonosis (histomoniasis, blackhead), beside coccidiosis, belongs to the most important parasitic protozoan diseases in poultry. So far Histomonas meleagridis infections with varied mortality rates have been mainly diagnosed in young turkeys. Recently an increasing number of cases have been reported in chicken flocks in Europe resulting in economic losses. It is thought that this situation is predominantly caused by a complete withdrawal of the effective antihistomonals in the EU. Authors listed the selected outbreaks of histomonosis in 10 chicken flocks originated from different farms of 4 regions in Poland: 8 broiler breeder flocks (at mean age of 33 weeks) and 2 commercial layers flocks (at mean age of 38 weeks). This study reported here naturally occurring case of H.meleagridis infection in commercial broiler breeder (BB) flock line ROSS 308 at the age of 16 weeks. We showed acute form of infection with characteristic necrotic foci in the liver, and ulcerative typhilitis. Beside the liver and caeca, the multiple histomonads, lymphoid tissue depletion and heavy destruction in the bursa of Fabricius were observed. Additionally, the absence of systemic diffuse histomonads and lack of Heterakis gallinarum, caecal worm eggs in faecal samples were noted. PCR technique enabled to detect the presence of H.meleagridis genetic material in the investigated tissue samples. Authors indicate that histomonosis can be considered as re-emerging infectious diseases in chicken flocks of intensive production system.

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Histopathology of liver (a) and bursa of Fabricius (b) with multiple oval-shaped histomonads (arrows). Original magnifications: 400x (a), 100x (b); hematoxylin-eosin staining (H-E)
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Fig2: Histopathology of liver (a) and bursa of Fabricius (b) with multiple oval-shaped histomonads (arrows). Original magnifications: 400x (a), 100x (b); hematoxylin-eosin staining (H-E)

Mentions: Histopathological examination showed massive multifocal necrosis and haemorrhages in the liver, moderate infiltration of mononuclear cells and multiple flagellated forms of the trophozoite dispersed within the organ (Fig. 2a). Furthermore, in the caeca were found trophozoites under the layer of exudation and multiple bacteria. Haemorrhage lesions were noted in kidneys, together with parenchyma degeneration and necrosis. Bursa of Fabricius showed depletion of lymphoid tissue and focal localization of trophozoites in the cytoplasm of phagocytes (Fig. 2b).Fig. 2


Histomonosis - an existing problem in chicken flocks in Poland.

Dolka B, Żbikowski A, Dolka I, Szeleszczuk P - Vet. Res. Commun. (2015)

Histopathology of liver (a) and bursa of Fabricius (b) with multiple oval-shaped histomonads (arrows). Original magnifications: 400x (a), 100x (b); hematoxylin-eosin staining (H-E)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4539355&req=5

Fig2: Histopathology of liver (a) and bursa of Fabricius (b) with multiple oval-shaped histomonads (arrows). Original magnifications: 400x (a), 100x (b); hematoxylin-eosin staining (H-E)
Mentions: Histopathological examination showed massive multifocal necrosis and haemorrhages in the liver, moderate infiltration of mononuclear cells and multiple flagellated forms of the trophozoite dispersed within the organ (Fig. 2a). Furthermore, in the caeca were found trophozoites under the layer of exudation and multiple bacteria. Haemorrhage lesions were noted in kidneys, together with parenchyma degeneration and necrosis. Bursa of Fabricius showed depletion of lymphoid tissue and focal localization of trophozoites in the cytoplasm of phagocytes (Fig. 2b).Fig. 2

Bottom Line: Recently an increasing number of cases have been reported in chicken flocks in Europe resulting in economic losses.It is thought that this situation is predominantly caused by a complete withdrawal of the effective antihistomonals in the EU.Additionally, the absence of systemic diffuse histomonads and lack of Heterakis gallinarum, caecal worm eggs in faecal samples were noted.

View Article: PubMed Central - PubMed

Affiliation: Department of Pathology and Veterinary Diagnostics, Faculty of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159c St., 02-776, Warsaw, Poland, beata_dolka@sggw.pl.

ABSTRACT
Histomonosis (histomoniasis, blackhead), beside coccidiosis, belongs to the most important parasitic protozoan diseases in poultry. So far Histomonas meleagridis infections with varied mortality rates have been mainly diagnosed in young turkeys. Recently an increasing number of cases have been reported in chicken flocks in Europe resulting in economic losses. It is thought that this situation is predominantly caused by a complete withdrawal of the effective antihistomonals in the EU. Authors listed the selected outbreaks of histomonosis in 10 chicken flocks originated from different farms of 4 regions in Poland: 8 broiler breeder flocks (at mean age of 33 weeks) and 2 commercial layers flocks (at mean age of 38 weeks). This study reported here naturally occurring case of H.meleagridis infection in commercial broiler breeder (BB) flock line ROSS 308 at the age of 16 weeks. We showed acute form of infection with characteristic necrotic foci in the liver, and ulcerative typhilitis. Beside the liver and caeca, the multiple histomonads, lymphoid tissue depletion and heavy destruction in the bursa of Fabricius were observed. Additionally, the absence of systemic diffuse histomonads and lack of Heterakis gallinarum, caecal worm eggs in faecal samples were noted. PCR technique enabled to detect the presence of H.meleagridis genetic material in the investigated tissue samples. Authors indicate that histomonosis can be considered as re-emerging infectious diseases in chicken flocks of intensive production system.

Show MeSH
Related in: MedlinePlus