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Assessment of Zoonotic Risk following Diagnosis of Canine Tularemia in a Veterinary Medical Teaching Hospital

Author

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  • Lynelle R. Johnson

    (Department of Medicine and Epidemiology, University of California-Davis, 2108 Tupper Hall, Davis, CA 95616, USA)

  • Steven E. Epstein

    (Department of Surgical and Radiological Sciences, University of California-Davis, 2112 Tupper Hall, Davis, CA 95616, USA)

  • Jonathan D. Dear

    (Department of Medicine and Epidemiology, University of California-Davis, 2108 Tupper Hall, Davis, CA 95616, USA)

  • Barbara A. Byrne

    (Department of Pathology, Microbiology, and Immunology, University of California-Davis, 4206 VM3A, Davis, CA 95616, USA)

Abstract

Tularemia is a rare zoonotic disease found worldwide. The agent responsible for disease, Francisella tularensis , is one of the most highly infectious pathogens known, one that is capable of causing life-threatening illness with inhalation of <50 organisms. High infectivity explains concerns of its use in bioterrorism. This case describes a 4-year-old male neutered Australian shepherd presented for evaluation of hyporexia and fever. Physical examination revealed marked enlargement of the right superficial cervical lymph node. Tularemia lymphadenitis was diagnosed by lymph node aspiration cytology and culture. Public health officials were advised of the isolation of this zoonotic pathogen, and contact tracing was instituted. Seven individuals associated with the aspiration event were screened for tularemia and treated with prophylactic ciprofloxacin. All were negative, and none became sick. The dog was treated with doxycycline for 3 weeks, and clinical signs and physical examination abnormalities were resolved fully. The owner, a solid organ transplant recipient, was also screened for disease and received prophylactic doxycycline due to a history of shared exposure. The owner remained well throughout the course of his dog’s disease and has heightened awareness of potential zoonoses. This case highlights the importance of animals as a sentinel for human health threats and for coordination of human and veterinary care.

Suggested Citation

  • Lynelle R. Johnson & Steven E. Epstein & Jonathan D. Dear & Barbara A. Byrne, 2022. "Assessment of Zoonotic Risk following Diagnosis of Canine Tularemia in a Veterinary Medical Teaching Hospital," IJERPH, MDPI, vol. 19(4), pages 1-6, February.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:4:p:2011-:d:746844
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    References listed on IDEAS

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    1. Damon J A Toth & Adi V Gundlapalli & Wiley A Schell & Kenneth Bulmahn & Thomas E Walton & Christopher W Woods & Catherine Coghill & Frank Gallegos & Matthew H Samore & Frederick R Adler, 2013. "Quantitative Models of the Dose-Response and Time Course of Inhalational Anthrax in Humans," PLOS Pathogens, Public Library of Science, vol. 9(8), pages 1-18, August.
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