[MARMAM] New publication: Alpha- and gammaherpesviruses in stranded striped dolphins (Stenella coeruleoalba) from Spain: first molecular detection of gammaherpesvirus infection in central nervous system of odontocetes

Ignacio Vargas Castro ignavarg at ucm.es
Sun Aug 16 23:23:45 PDT 2020


Dear MARMAM community,

We are please to announce the following paper about cetacean herpesvirus
recently published in BMC Veterinary Research:

Ignacio Vargas-Castro, José Luis Crespo-Picazo, Belén Rivera-Arroyo,
Rocío Sánchez, Vicente Marco-Cabedo, María Ángeles Jiménez-Martínez,
Manena Fayos, Ángel Serdio, Daniel García-Párraga,
José Manuel Sánchez-Vizcaíno. *Alpha- and gammaherpesviruses in stranded
striped dolphins (Stenella coeruleoalba) from Spain: first molecular
detection of gammaherpesvirus infection in central nervous system of
odontocetes. *BMC Vet Res 16, 288 (2020).
https://doi.org/10.1186/s12917-020-02511-3


Abstract:
Background

Herpesvirus infections in cetaceans have always been attributed to
the Alphaherpesvirinae and Gammaherpesvirinae subfamilies. To date,
gammaherpesviruses have not been reported in the central nervous system of
odontocetes.
Case presentation

A mass stranding of 14 striped dolphins (Stenella coeruleoalba) occurred in
Cantabria (Spain) on 18th May 2019. Tissue samples were collected and
tested for herpesvirus using nested polymerase chain reaction (PCR), and
for cetacean morbillivirus using reverse transcription-PCR. Cetacean
morbillivirus was not detected in any of the animals, while
gammaherpesvirus was detected in nine male and one female dolphins. Three
of these males were coinfected by alphaherpesviruses. Alphaherpesvirus
sequences were detected in the cerebrum, spinal cord and tracheobronchial
lymph node, while gammaherpesvirus sequences were detected in the cerebrum,
cerebellum, spinal cord, pharyngeal tonsils, mesenteric lymph node,
tracheobronchial lymph node, lung, skin and penile mucosa. Macroscopic and
histopathological post-mortem examinations did not unveil the potential
cause of the mass stranding event or any evidence of severe infectious
disease in the dolphins. The only observed lesions that may be associated
with herpesvirus were three cases of balanitis and one penile papilloma.
Conclusions

To the authors’ knowledge, this is the first report of gammaherpesvirus
infection in the central nervous system of odontocete cetaceans. This
raises new questions for future studies about how gammaherpesviruses reach
the central nervous system and how infection manifests clinically.


Kind regards,

----------

Ignacio Vargas Castro

DMV, PhD student

Animal Health Department and VISAVET

Complutense University of Madrid

ignavarg at ucm.es
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