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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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Macroscopic lesions in liver (a) and in caeca (b) in chickens
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Fig1: Macroscopic lesions in liver (a) and in caeca (b) in chickens

Mentions: The external inspection of carcasses revealed severe emaciation, mat feathers and cloaca covered with faeces. During necropsy, an advanced liver damage manifested with enlargement, congestion with numerous yellow necrotic foci were noted (Fig. 1a). Additionally, we noted spleen congestion with beige rounded areas of necrosis, pulmonary congestion and obliterated structure of folds bursa of Fabricius. The kidneys were pale brown with increased urates in the ureters. We noted haemorrhagic inflammation of small intestine, thickening of the caecal wall with caseous inflammation and the ulceration of the mucosa (Fig. 1b).Fig. 1


Histomonosis - an existing problem in chicken flocks in Poland.

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

Macroscopic lesions in liver (a) and in caeca (b) in chickens
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig1: Macroscopic lesions in liver (a) and in caeca (b) in chickens
Mentions: The external inspection of carcasses revealed severe emaciation, mat feathers and cloaca covered with faeces. During necropsy, an advanced liver damage manifested with enlargement, congestion with numerous yellow necrotic foci were noted (Fig. 1a). Additionally, we noted spleen congestion with beige rounded areas of necrosis, pulmonary congestion and obliterated structure of folds bursa of Fabricius. The kidneys were pale brown with increased urates in the ureters. We noted haemorrhagic inflammation of small intestine, thickening of the caecal wall with caseous inflammation and the ulceration of the mucosa (Fig. 1b).Fig. 1

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