Fatal Streptococcus iniae Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (Delphinus delphis)

Streptococcus iniae (S. iniae) is a significant aquatic pathogen of farmed fish species, important zoonotic pathogen, and reported cause of disease in captive Amazon River dolphins (Inia geoffrensis) and a bottlenose dolphin (Tursiops truncatus...

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Autores principales:	Rebecca Souter, Anne-Lise Chaber, Ken Lee, Aaron Machado, Jia Lam, Lucy Woolford
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	<i>Streptococcus iniae</i> short-beaked common dolphin zoonosis Veterinary medicine SF600-1100 Zoology QL1-991
Acceso en línea:	https://doaj.org/article/185cb35b32174cd3b9f0b1688222dbd1
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spelling	oai:doaj.org-article:185cb35b32174cd3b9f0b1688222dbd12021-11-25T16:16:13ZFatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)10.3390/ani111131232076-2615https://doaj.org/article/185cb35b32174cd3b9f0b1688222dbd12021-10-01T00:00:00Zhttps://www.mdpi.com/2076-2615/11/11/3123https://doaj.org/toc/2076-2615<i>Streptococcus iniae (S. iniae)</i> is a significant aquatic pathogen of farmed fish species, important zoonotic pathogen, and reported cause of disease in captive Amazon River dolphins (<i>Inia geoffrensis</i>) and a bottlenose dolphin (<i>Tursiops truncatus</i>). Here we report <i>S. iniae</i> as the cause of subcutaneous abscesses, sepsis and mortality in a juvenile free-ranging short-beaked common dolphin (<i>Delphinus delphis</i>) found deceased on a metropolitan Australian beach. Body surfaces were covered by multifocal, depressed, deep, irregular cutaneous ulcerations, which microscopically were characterised by ruptured subcutaneous abscesses with intralesional cocci. Routine microbiological investigations revealed a heavy growth of beta-haemolytic <i>Streptococcus</i> sp. identified as <i>Streptococcus iniae</i> in skin lesions as well as from heart blood, the latter supportive of sepsis. Tissues were negative for cetacean morbillivirus and no other disease processes were identified. <i>S. iniae</i> has not been reported in free-ranging marine mammals, nor in Australian delphinids, previously. More notably a pathogen of captive animals, this case report identifies <i>S. iniae</i> as a pathogen of wild dolphins also. In addition to expanding the host reservoir of a significant zoonotic pathogen, determining the source of infection as well as possible consequences for other marine mammals and wild and intensive fish stocks warrants further investigations.Rebecca SouterAnne-Lise ChaberKen LeeAaron MachadoJia LamLucy WoolfordMDPI AGarticle<i>Streptococcus iniae</i>short-beaked common dolphinzoonosisVeterinary medicineSF600-1100ZoologyQL1-991ENAnimals, Vol 11, Iss 3123, p 3123 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	<i>Streptococcus iniae</i> short-beaked common dolphin zoonosis Veterinary medicine SF600-1100 Zoology QL1-991
spellingShingle	<i>Streptococcus iniae</i> short-beaked common dolphin zoonosis Veterinary medicine SF600-1100 Zoology QL1-991 Rebecca Souter Anne-Lise Chaber Ken Lee Aaron Machado Jia Lam Lucy Woolford Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)
description	<i>Streptococcus iniae (S. iniae)</i> is a significant aquatic pathogen of farmed fish species, important zoonotic pathogen, and reported cause of disease in captive Amazon River dolphins (<i>Inia geoffrensis</i>) and a bottlenose dolphin (<i>Tursiops truncatus</i>). Here we report <i>S. iniae</i> as the cause of subcutaneous abscesses, sepsis and mortality in a juvenile free-ranging short-beaked common dolphin (<i>Delphinus delphis</i>) found deceased on a metropolitan Australian beach. Body surfaces were covered by multifocal, depressed, deep, irregular cutaneous ulcerations, which microscopically were characterised by ruptured subcutaneous abscesses with intralesional cocci. Routine microbiological investigations revealed a heavy growth of beta-haemolytic <i>Streptococcus</i> sp. identified as <i>Streptococcus iniae</i> in skin lesions as well as from heart blood, the latter supportive of sepsis. Tissues were negative for cetacean morbillivirus and no other disease processes were identified. <i>S. iniae</i> has not been reported in free-ranging marine mammals, nor in Australian delphinids, previously. More notably a pathogen of captive animals, this case report identifies <i>S. iniae</i> as a pathogen of wild dolphins also. In addition to expanding the host reservoir of a significant zoonotic pathogen, determining the source of infection as well as possible consequences for other marine mammals and wild and intensive fish stocks warrants further investigations.
format	article
author	Rebecca Souter Anne-Lise Chaber Ken Lee Aaron Machado Jia Lam Lucy Woolford
author_facet	Rebecca Souter Anne-Lise Chaber Ken Lee Aaron Machado Jia Lam Lucy Woolford
author_sort	Rebecca Souter
title	Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)
title_short	Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)
title_full	Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)
title_fullStr	Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)
title_full_unstemmed	Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)
title_sort	fatal <i>streptococcus iniae</i> infection in a juvenile free-ranging short-beaked common dolphin (<i>delphinus delphis</i>)
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/185cb35b32174cd3b9f0b1688222dbd1
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Fatal <i>Streptococcus iniae</i> Infection in a Juvenile Free-Ranging Short-Beaked Common Dolphin (<i>Delphinus delphis</i>)

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