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The protozoan parasite Histomonas meleagridis is the causative agent of histomonosis in gallinaceous birds. In turkeys, the disease can result in high mortality due to severe inflammation and necrosis in caecum and liver, whereas in chickens the disease is less severe. Recently, experimental vaccination was shown to protect chickens and turkeys against histomonosis but dynamics in the cellular immune...
Virulent fowl adenovirus (FAdV) serotype 4 strains are the etiological agents of hepatitis–hydropericardium syndrome (HHS), a highly infectious disease in chickens with severe economic impact.In the present study, three different FAdV-4 derived capsid proteins, fiber-1, fiber-2, and hexon loop-1, were expressed in a baculovirus system and tested for their capacity to induce protection in chickens...
The efficacy of vaccinating poultry against histomonosis was demonstrated recently. In the present study, the reversion to virulence and the residual pathogenicity of an in vitro attenuated, clonal strain of Histomonas meleagridis were tested in two consecutive experiments. The European Pharmcopoeia (Ph. Eur.) monograph for testing such features for coccidiosis live vaccines in chickens has served...
Histomonas meleagridis is a flagellated protozoan parasite and the aetiological agent of histomonosis (histomoniasis or blackhead disease), a severe disease in poultry with very limited options for treatment. In the present investigation an inactivated vaccine, based on destroyed parasites and administered by intramuscular injection, failed to induce an efficient protection against a severe challenge...
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