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Updated: Jun 30, 2025
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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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Lumpy jaw caused by Nocardia farcinica in a Holstein cow
Sara Shokrpoor1, Reza Darabian Aghdas2, Zahra Ziafati Kafi3
1Department of Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Veterinary Medicine and Science
|March 23, 2024
Summary
This study reports the first case of lumpy jaw in a cow caused by Nocardia farcinica. The bacterium, identified as a new strain Najm 114, led to the cow
Area of Science:
- Veterinary Medicine
- Bacteriology
- Genomics
Background:
- Lumpy jaw, a condition affecting cattle, is typically caused by other bacterial agents.
- Nocardia farcinica is an actinomycete bacterium with zoonotic potential.
Observation:
- A Holstein cow presented with a large, firm, ulcerated mandibular mass causing pain and excessive salivation.
- The mass was approximately 17 × 12 × 10 cm³ and attached to the mandible bone.
Findings:
- Bacteriology and histopathology confirmed lumpy jaw caused by Nocardia farcinica.
- Genome sequencing identified a novel strain, Najm 114.
- The cow was euthanized due to zoonotic risk.
Implications:
- Nocardia farcinica should be recognized as a potential cause of lumpy jaw in cattle.
- This finding highlights the importance of considering zoonotic agents in bovine diseases.
- Further research into N. farcinica infections in livestock is warranted.
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