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Microorganisms
Volume 10
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10.3390/microorganisms10050883
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Communication

Isolation and Genetic Characterization of Streptococcus iniae Virulence Factors in Adriatic Sturgeon (Acipenser naccarii)

by
Silvia Colussi
1,
Paolo Pastorino
1,*,
Davide Mugetti
1,*,
Elisabetta Antuofermo
2,
Simona Sciuto
1,
Giuseppe Esposito
1,
Marta Polinas
2,
Mattia Tomasoni
1,
Giovanni Pietro Burrai
2,
José Francisco Fernández-Garayzábal
3,
Pier Luigi Acutis
1,
Claudio Pedron
4 and
Marino Prearo
1
1
The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d’Aosta, 10154 Turin, Italy
2
Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy
3
Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense de Madrid, 28040 Madrid, Spain
4
Independent Researcher, DVM, 20090 Settala, Italy
*
Authors to whom correspondence should be addressed.
Microorganisms 2022, 10(5), 883; https://doi.org/10.3390/microorganisms10050883
Submission received: 23 March 2022 / Revised: 15 April 2022 / Accepted: 20 April 2022 / Published: 22 April 2022
(This article belongs to the Special Issue Advances in Bacterial Fish and Shellfish Diseases in Aquaculture)
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Abstract

The first case of infection of Streptococcus iniae in Adriatic sturgeon (Acipenser naccarii) was recently reported in a raceway system located in Northern Italy. A second episode of infection in sturgeons with absence of mortality and evident clinical signs, was registered in November 2020 in the same farm and is reported in this study. Histopathological changes observed in infected organs are described. The strains isolated in the two episodes were compared using molecular analysis based on PCR, phylogeny and virulence factors analysis. Not all the major virulence factors were detected for the two strains; in particular the strains 78697, isolated in November, lacks cpsD, compared to the strains 64844, isolated in September. Moreover, genetic variations were reported for lctO and pmg genes. These findings let us hypothesize a different virulence of the strains in accordance with clinical findings related to the sturgeons.
Keywords: bacterial diseases; streptococcosis; Acipenseridae; virulence factors bacterial diseases; streptococcosis; Acipenseridae; virulence factors

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MDPI and ACS Style

Colussi, S.; Pastorino, P.; Mugetti, D.; Antuofermo, E.; Sciuto, S.; Esposito, G.; Polinas, M.; Tomasoni, M.; Burrai, G.P.; Fernández-Garayzábal, J.F.; et al. Isolation and Genetic Characterization of Streptococcus iniae Virulence Factors in Adriatic Sturgeon (Acipenser naccarii). Microorganisms 2022, 10, 883. https://doi.org/10.3390/microorganisms10050883

AMA Style

Colussi S, Pastorino P, Mugetti D, Antuofermo E, Sciuto S, Esposito G, Polinas M, Tomasoni M, Burrai GP, Fernández-Garayzábal JF, et al. Isolation and Genetic Characterization of Streptococcus iniae Virulence Factors in Adriatic Sturgeon (Acipenser naccarii). Microorganisms. 2022; 10(5):883. https://doi.org/10.3390/microorganisms10050883

Chicago/Turabian Style

Colussi, Silvia, Paolo Pastorino, Davide Mugetti, Elisabetta Antuofermo, Simona Sciuto, Giuseppe Esposito, Marta Polinas, Mattia Tomasoni, Giovanni Pietro Burrai, José Francisco Fernández-Garayzábal, and et al. 2022. "Isolation and Genetic Characterization of Streptococcus iniae Virulence Factors in Adriatic Sturgeon (Acipenser naccarii)" Microorganisms 10, no. 5: 883. https://doi.org/10.3390/microorganisms10050883

APA Style

Colussi, S., Pastorino, P., Mugetti, D., Antuofermo, E., Sciuto, S., Esposito, G., Polinas, M., Tomasoni, M., Burrai, G. P., Fernández-Garayzábal, J. F., Acutis, P. L., Pedron, C., & Prearo, M. (2022). Isolation and Genetic Characterization of Streptococcus iniae Virulence Factors in Adriatic Sturgeon (Acipenser naccarii). Microorganisms, 10(5), 883. https://doi.org/10.3390/microorganisms10050883

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