Characterization of prevalent bacterial pathogens associated with pododermatitis in table egg layers.
Rikke Heidemann Olsen1, Henrik Christensen1, Susanne Kabell2
1a Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences , University of Copenhagen , Frederiksberg , Denmark.
Avian Pathology : Journal of the W.V.P.A
|March 9, 2018
Summary
Staphylococcus aureus is a primary cause of poultry pododermatitis, with specific strains identified in affected birds and healthy chicks. Other bacteria like Enterococcus faecalis and Escherichia coli show diverse origins in these cases.
Area of Science:
- Veterinary Microbiology
- Poultry Pathology
- Bacterial Pathogenesis
Background:
- Pododermatitis is a significant issue in Danish layer flocks, with complex causes including litter, nutrition, and management.
- The role of bacterial pathogens in poultry pododermatitis has been under-investigated.
Purpose of the Study:
- To identify bacterial isolates from pododermatitis lesions in table egg layers.
- To investigate the prevalence and types of Staphylococcus aureus in affected flocks.
Main Methods:
- Bacterial identification using standard microbiological techniques, PCR, 16S rRNA sequencing, and MALDI-TOF.
- Spa-typing for Staphylococcus aureus isolates.
- Comparison with isolates from spleen/bursa and sepsis-affected chicks.
Main Results:
- Staphylococcus aureus (68%) and Enterococcus faecalis (14%) were the most common isolates from pododermatitis.
- Specific S. aureus spa-types (t8646 and t002) were dominant and also found in internal organs and healthy chicks, suggesting ubiquitous presence.
- Enterococcus faecalis and Escherichia coli isolates displayed significant genetic diversity.
Conclusions:
- Staphylococcus aureus is a major pathogen linked to poultry pododermatitis, potentially originating from a common source.
- The diverse populations of Enterococcus faecalis and Escherichia coli suggest multiple origins for these bacteria in pododermatitis cases.
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