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Pathological features in dead on arrival broilers with special reference to heart disorders.

E Nijdam1, A R M Zailan, J H H van Eck

  • 1Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, The Netherlands. edwinnijdam@hotmail.com

Poultry Science
|July 13, 2006
PubMed
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Investigating broiler deaths revealed infectious diseases, heart issues, and trauma as key factors. Addressing heart health and handling practices is crucial for reducing mortality in broilers.

Area of Science:

  • Veterinary Pathology
  • Avian Medicine
  • Animal Husbandry

Background:

  • Mortality in broilers between catching and slaughter (Dead on Arrival - DOA) is a significant economic concern.
  • Understanding predisposing factors for DOA is essential for improving flock livability.

Purpose of the Study:

  • To investigate the causes of mortality in broilers that die between catching and slaughter.
  • To identify predisposing factors, with a focus on cardiac disorders and postmortem changes.

Main Methods:

  • Gross postmortem examination of 302 broilers that were Dead on Arrival (DOA).
  • Assessment of heart disorders by measuring the right ventricle mass to total ventricle mass (RV:TV) ratio.
  • Evaluation of postmortem changes in hearts and lungs.

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Main Results:

  • Macroscopic lesions were present in 89.4% of DOA broilers.
  • Infectious diseases (64.9%), heart/circulation disorders (42.4%), and trauma (29.5%) were the most frequent causes.
  • DOA broilers exhibited a significantly higher RV:TV ratio (34.4%) compared to slaughtered broilers (4.1%), often associated with ascites and hydropericardium.

Conclusions:

  • Improving broiler health status and optimizing catching/crating processes are vital for reducing DOA.
  • Preventing abnormal heart ratios and ascites can significantly decrease broiler mortality rates.