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Title: Nocardiosis in Free-Ranging Cetaceans from the Central-Eastern Atlantic Ocean and Contiguous Mediterranean Sea
Authors: Díaz Santana, Pablo José 
Fernández Rodríguez, Antonio Jesús 
Diaz Delgado, Josue 
Vela, Ana Isabel
Domínguez, Lucas
Suarez Santana, Cristian Manuel 
Puig Lozano, Raquel Patricia 
Fernández-Maldonado, Carolina
Sierra Pulpillo, Eva María 
Arbelo Hernández, Manuel Antonio 
UNESCO Clasification: 3109 Ciencias veterinarias
3207 Patología
Keywords: Andalusia
Bottlenose Dolphin
Canary Islands
Nocardiosis, et al
Issue Date: 2022
Journal: Animals 
Abstract: We report the pathologic features of nocardiosis in five free-ranging delphinids from the Canary Islands and Andalusia, namely four striped dolphins (Stenella coerulealba) and one bottle-nose dolphin (Tursiops truncatus). All animals had a multiorgan (disseminated) pattern of infection involving suppurative to pyogranulomatous and thromboembolic lesions in two or more organs. Most affected organs were (by decreasing order) lung, pulmonary lymph nodes, liver, kidney, ad-renal glands, and central nervous system. Typical intralesional and intravascular branched and fil-amentous bacteria were highlighted by Grocott’s methenamine silver and Gram stains. Bacterial analysis including 16S rRNA gene sequencing identified Nocardia farcinica in two striped dolphins and Nocardia otitidiscaviarum in one striped dolphin and the bottlenose dolphin. All dolphins tested (n = 4) for cetacean morbillivirus were negative; one dolphin had concurrent cutaneous herpesviro-sis. These results provide the first record of N. otitidiscaviarum in cetaceans, the first account of N. farcinica in free-ranging dolphins, and confirmation of nocardiosis in central eastern Atlantic Ocean. These results expand the known geographic range of nocardiosis in cetaceans.
ISSN: 2076-2615
DOI: 10.3390/ani12040434
Source: Animals[EISSN 2076-2615],v. 12 (4), (Febrero 2022)
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