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Published on: January 26, 2019
Yersinia pseudotuberculosis in an alpaca
Catherine B Krus1, Cristian Patino1, George M Barrington1
1Department of Clinical Sciences, College of Veterinary Medicine, Colorado State University, Ft. Collins, Colorado 80523, USA (Krus); Department of Veterinary Clinical Sciences (Patino, Barrington) and Department of Veterinary Microbiology and Pathology (Burbick), Washington State University, Pullman, Washington 99164, USA.
A 6-year-old alpaca presented with rapid weight loss and severe leukocytosis, ultimately diagnosed with Yersinia pseudotuberculosis. This case highlights the bacterium as a potential cause of abscessation in camelids.
Area of Science:
- Veterinary Medicine
- Microbiology
- Animal Pathology
Background:
- Yersinia pseudotuberculosis infections are rare in camelids.
- Abscessation and persistent leukocytosis are significant clinical signs in affected animals.
Observation:
- A 6-year-old female huacaya alpaca exhibited rapid weight loss, inappetence, lethargy, and severe leukocytosis.
- Abdominal ultrasonography revealed multiple masses with hyperechoic, swirling centers.
- Exploratory laparotomy identified mesenteric masses adhered to the jejunum.
Findings:
- Bacterial culture of abscess fluid identified Yersinia pseudotuberculosis.
- The alpaca's condition was inoperable, leading to euthanasia.
- Marked systemic inflammation was confirmed by complete blood count.
Implications:
- Yersinia pseudotuberculosis should be considered in camelid cases of abdominal abscessation and persistent leukocytosis.
- This case provides novel insights into the clinical progression and treatment challenges of Yersinia pseudotuberculosis in camelids.
- Yersinia pseudotuberculosis is a zoonotic agent, necessitating precautions during handling and treatment.
