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Title: Morbillivirus infection in Risso’s dolphin Grampus griseus: a phylogenetic and pathological study of cases from the Canary Islands
Authors: Sierra Pulpillo, Eva María 
Fernández Rodríguez, Antonio Jesús 
Succa, Daniele 
Camara, Nakita 
Felipe Jiménez, Idaira Del Carmen 
Suarez Santana, Cristian Manuel 
Diaz Delgado, Josue 
Arbelo Hernández, Manuel Antonio 
Bernaldo De Quirós Miranda, Yara 
UNESCO Clasification: 240111 Patología animal
240118 Mamíferos
Keywords: Central eastern Atlantic Ocean
Non-suppurative meningoencephalitis
Risso’s dolphin
Issue Date: 2018
Journal: Diseases of Aquatic Organisms 
Abstract: The earliest evidence of cetacean morbillivirus (CeMV) infection dates from 1982, when the dolphin morbillivirus strain (DMV) was identified in bottlenose dolphins Tursiops truncatus stranded in the mid-Atlantic region. Since then, CeMV has been detected globally in at least 26 species of mysticetes and odontocetes, causing widespread mortality and a wide range of pathological effects. In the Canary Islands, DMV and pilot whale morbillivirus have been detected in cetacean species, including short-finned pilot whales Globicephala macro rhynchus and bottlenose dolphins. Risso's dolphins Grampus griseus have been reported year-round in waters of the Canary Islands and are considered a resident species. No information is currently available on CeMV prevalence in this species in this ocean region. We searched for evidence of CeMV infection in 12 Risso's dolphins stranded in the Canary Islands from 2003 to 2015 by means of histopathology, PCR and immunohistochemistry. PCR revealed 2 CeMV-positive animals (16.6%). Phylogenetic analysis showed that the strains from the 2 positive specimens were phylogenetically quite distant, proving that more than 1 strain infects the Risso's dolphin population in this region. We also determined that the strain detected in one of the specimens mainly circulated in the northeastern Atlantic Ocean from 2007 to 2013.
ISSN: 0177-5103
DOI: 10.3354/dao03248
Source: Diseases of Aquatic Organisms [ISSN 0177-5103], v. 129 (3), p. 165-174
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