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Pullorum disease in Delaware roasters.

M Salem1, E M Odor, C Pope

  • 1Research and Education Center, University of Delaware, Georgetown 19947.

Avian Diseases
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

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A case of pullorum disease in roaster chickens showed severe joint swelling and organ nodules. Salmonella pullorum was identified in joint fluid, highlighting a significant poultry health concern.

Area of Science:

  • Veterinary Pathology
  • Poultry Medicine
  • Bacteriology

Background:

  • Pullorum disease, caused by Salmonella pullorum, is a significant concern in commercial poultry operations.
  • Early detection and accurate diagnosis are crucial for managing outbreaks and preventing economic losses.

Purpose of the Study:

  • To report an index case of pullorum disease in 4-week-old roaster chickens.
  • To describe the clinical and pathological findings associated with the infection.
  • To detail the diagnostic methods used for Salmonella pullorum identification.

Main Methods:

  • Postmortem examination of affected roaster chickens.
  • Bacteriological culture of articular fluid, liver, spleen, and heart.
  • Isolation of Salmonella pullorum on MacConkey agar and enrichment in selenite broth.

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Main Results:

  • Gross lesions included severe articular/periarticular swelling (hock/wing), hydropericardium, and white-gray nodules in the heart and gizzard.
  • Livers exhibited white foci, petechial hemorrhages, and swelling.
  • Salmonella pullorum was successfully isolated from articular fluid via direct culture.
  • Salmonella pullorum was not isolated from liver, spleen, or heart samples after enrichment.

Conclusions:

  • This case highlights the characteristic clinical and pathological signs of pullorum disease in roaster chickens.
  • Direct culture from affected joints can be effective for Salmonella pullorum isolation.
  • Further investigation may be needed to understand the distribution and detectability of Salmonella pullorum in internal organs during outbreaks.