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Diseases of Aquatic Organisms

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DAO 146:75-79 (2021)  -  DOI:

Teleost fish: a new spontaneous model for the study of Lambl’s excrescences

Davide Mugetti1,#, Elena Colombino2,#, Maria Teresa Capucchio2,*, Christian Salogni3, Paolo Pastorino1, Laura Chiappino2, Alessandra Sereno2, Marino Prearo1, Franco Guarda2

1Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy
2Department of Veterinary Sciences, University of Turin, 10095 Grugliasco (TO), Italy
3Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna ‘Bruno Ubertini’, 25124 Brescia, Italy
*Corresponding author:
#These authors contributed equally

ABSTRACT: Lambl’s excrescences (LE) are fibrous strands typically occurring at coaptation lines of cardiac valves. Although they have been widely reported in human medicine, information on LE occurrence in veterinary medicine is still scarce. The present study aimed to investigate the presence of LE in different freshwater fish and in swordfish. A total of 185 hearts were collected from different fish species, and samples of different cardiac areas (sinus venosus, atrial wall with sinoatrial valves, ventricular wall with atrioventricular valves and bulb with bulboventricular valves) were submitted to histopathological evaluation. LE were detected in 6 of 103 freshwater fish (5.8%) and 19 of 82 swordfish (23.2%). LE developed in atrioventricular, sinoatrial and bulboventricular valves. All affected valves also showed endocardiosis. Based on the results of the present work, teleost fish, specifically swordfish, could be proposed as a novel spontaneous model for the study of LE pathogenesis.

KEY WORDS: Lambl’s excrescences · Teleost fish · Cardiac valves · Histology · Endocardiosis

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Cite this article as: Mugetti D, Colombino E, Capucchio MT, Salogni C and others (2021) Teleost fish: a new spontaneous model for the study of Lambl’s excrescences. Dis Aquat Org 146:75-79.

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