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Fatal Erysipelothrix rhusiopathiae septicemia in two Atlantic dolphins (Stenella frontalis and Tursiops truncatus)

Diseases of Aquatic Organisms publish this investigation article

September 17th, 2015

We describe gross, histopathologic, ultrastructural, immunohistochemical, and microbiologic features of acute septicemia by Erysipelothrix rhusiopathiae in an Atlantic spotted dolphin Stenella frontalis and an Atlantic bottlenose dolphin Tursiops truncatus. Generalized lymphadenomegaly and widespread hemorrhages were the most consistent macroscopic findings. Tricavitary effusion and icterus were noted in one individual. Histologically, all organs examined showed numerous variably sized bacillary bacterial emboli (Gram-positive; Ziehl-Neelsen-negative), typically associated with systemic congestion, edema, hemorrhages, and fibrinocellular thrombi. These bacteria were frequently intravascular, either extracellular or intramonocytic/macrophagic, and to a lesser extent, free within the interstitium of parenchymal organs. In both cases, microbiological analysis yielded E. rhusiopathiae. A primary anti-E. rhusiopathiae antibody created in mice from one of the strains isolated allowed positive immunohistochemical detection. Electron microscopy and dual immunohistochemistry with lysozyme and MAC387 antibodies confirmed the intramacrophagic location of the bacilli. E. rhusiopathiae, a known multispecies and zoonotic agent, should be considered as a potential etiologic agent in septicemia cases in free-ranging individuals of these dolphin species




Diaz-Delgado J., Arbelo M., Sierra E., Vela AI., Dominguez M., Paz Y., Andrada M., Dominguez L. and Fernandez A.




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Fatal Erysipelothrix rhusiopathiae septicemia in two Atlantic dolphins (Stenella frontalis and Tursiops truncatus)

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Fatal Erysipelothrix rhusiopathiae septicemia in two Atlantic dolphins (Stenella frontalis and Tursiops truncatus)



Participants:

Universidad de Las Palmas de Gran CanariaFacultad de Veterinaria. Universidad de Las Palmas de Gran Canaria (ULPGC).

Universidad ComplutenseDepartamento de Sanidad Animal. Facultad de Veterinaria. Universidad Complutense (UCM).

Universidad ComplutenseServicio de Identificación y Caracterización Microbiana (ICM). Centro de Vigilancia Sanitaria Veterinaria (VISAVET). Universidad Complutense (UCM).

Instituto de Salud Carlos IIIServicio de Inmunología. Centro Nacional de Microbiología (CNM). Instituto de Salud Carlos III (ISCIII).







Diseases of Aquatic Organisms
FACTOR YEAR Q
1.770 2015

NLMID: 8807037

PMID: 26378410

ISSN: 0177-5103



TITLE: Fatal Erysipelothrix rhusiopathiae septicemia in two Atlantic dolphins (Stenella frontalis and Tursiops truncatus)


JOURNAL: Dis Aquat Org


NUMERACIÓN: 116(1):75-81


AÑO: 2015


PUBLISHER: Inter-Research


AUTHORS: Diaz-Delgado J., Arbelo M., Sierra E., Vela AI., Dominguez M., Paz Y., Andrada M., Dominguez L. and Fernandez A.


4th
Ana Isabel Vela Alonso
5th
Mercedes Domínguez Rodríguez
8th
Lucas Domínguez Rodríguez

DOI: https://doi.org/10.3354/dao02900


CITE THIS PUBLICATION:

Diaz-Delgado J., Arbelo M., Sierra E., Vela AI., Dominguez M., Paz Y., Andrada M., Dominguez L. and Fernandez A. Fatal Erysipelothrix rhusiopathiae septicemia in two Atlantic dolphins (Stenella frontalis and Tursiops truncatus). Diseases of Aquatic Organisms. 116(1):75-81. 2015. (A). ISSN: 0177-5103. DOI: 10.3354/dao02900


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