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Diseases of Aquatic Organisms

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DAO 142:119-124 (2020)  -  DOI: https://doi.org/10.3354/dao03540

NOTE
An outbreak of multidrug-resistant Salmonella Kentucky infection in long-nosed fur seals

David J. Blyde1,*, Duan March2, Peter Howard3, Vitali Sintchenko4, Estelle Rousselet5, Cathrine Atkin1

1Sea World, PO Box 190, Surfers Paradise, 4217 Queensland, Australia
2Dolphin Marine Rescue, Coffs Harbour, 2450 New South Wales, Australia
3Pathology West - ICPMR, NSW Enteric Reference Laboratory, Centre for Infectious Diseases & Microbiology, Westmead, 2145 New South Wales, Australia
4Sydney Medical School, The University of Sydney, Sydney, 2006 New South Wales, Australia
5Clinique Veterinaire Beaune, 45 Beaune Village, 41400 Chissay en Touraine, France
*Corresponding author:

ABSTRACT: An outbreak of salmonellosis occurred in a group of 7 long-nosed fur seals Arctocephalus forsteri undergoing rehabilitation after being found injured and malnourished on beaches along the northern New South Wales and southern Queensland coasts of Australia. Three of the 7 individuals developed clinical disease and died within 3 d. Clinical signs included profuse diarrhea, vomiting, depression, and lethargy. Salmonella enterica subsp. enterica serovar Kentucky (S. Kentucky) was cultured from 2 of the 3 deceased animals. The other 4 animals showed similar signs and recovered following treatment. S. Kentucky (antigenic formula 8,20:i:z6) was isolated from the survivors and tissues recovered from post-mortem samples of deceased animals. The bacterium was susceptible to cephalothin and sulfamethoxazole/trimethoprim and resistant to amoxicillin-clavulanate, ampicillin/amoxicillin, tetracycline, and enrofloxacin. This organism has the potential to cause disease in aquatic wildlife, as well as posing a zoonotic threat to people who utilise the aquatic environment.


KEY WORDS: Arctocephalus forsteri · Emerging disease · Long-nosed fur seals · Rehabilitation · Multi-drug resistant strain · Salmonella enterica serovar Kentucky


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Cite this article as: Blyde DJ, March D, Howard P, Sintchenko V, Rousselet E, Atkin C (2020) An outbreak of multidrug-resistant Salmonella Kentucky infection in long-nosed fur seals. Dis Aquat Org 142:119-124. https://doi.org/10.3354/dao03540

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