Francesca Carella, Dušan Palić, Tomislav Šarić, Ivan Župan, Bartolomeo Gorgoglione, Patricia Prado, Karl B. Andree, Ioannis A. Giantsis, Basile Michaelidis, Athanasios Lattos, John A. Theodorou, Juan Luis Barja Perez, Sergio Rodriguez, Fabio Scarpa, Marco Casu, Elisabetta Antuofermo, Daria Sanna, Domenico Otranto, Rossella Panarese, Carmelo Iaria, Fabio Marino, Gionata De Vico

Multipathogen infections and multifactorial pathogenesis involved in noble pen shell (Pinna nobilis) mass mortality events: Background and current pathologic approaches

  • General Veterinary
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Disease outbreaks in several ecologically or commercially important invertebrate marine species have been reported in recent years all over the world. Mass mortality events (MMEs) have affected the noble pen shell ( Pinna nobilis), causing its near extinction. Our knowledge of the dynamics of diseases affecting this species is still unclear. Early studies investigating the causative etiological agent focused on a novel protozoan parasite, Haplosporidium pinnae, although further investigations suggested that concurrent polymicrobial infections could have been pivotal in some MMEs, even in the absence of H. pinnae. Indeed, moribund specimens collected during MMEs in Italy, Greece, and Spain demonstrated the presence of a bacteria from within the Mycobacterium simiae complex and, in some cases, species similar to Vibrio mediterranei. The diagnostic processes used for investigation of MMEs are still not standardized and require the expertise of veterinary and para-veterinary pathologists, who could simultaneously evaluate a variety of factors, from clinical signs to environmental conditions. Here, we review the available literature on mortality events in P. nobilis and discuss approaches to define MMEs in P. nobilis. The proposed consensus approach should form the basis for establishing a foundation for future studies aimed at preserving populations in the wild.

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