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First assessment of Perkinsosis and brown ring disease co-infection in Ruditapes decussatus in the North Lake of Tunis (southern Mediterranean Sea)

Published online by Cambridge University Press:  09 December 2012

Monia El Bour*
Affiliation:
Laboratoire de Pathologie des Organismes Aquatiques, Institut National Des Sciences et Technologies de la Mer (INSTM), Rue du 2 mars 1934, 2025, Salammbô, Tunisie
Mohamed Dellali
Affiliation:
Laboratoire d'Ecologie et de Bio-surveillance Côtière, FSB, 7021, Zarzouna, Tunisie
Imene Boukef
Affiliation:
Laboratoire de Pathologie des Organismes Aquatiques, Institut National Des Sciences et Technologies de la Mer (INSTM), Rue du 2 mars 1934, 2025, Salammbô, Tunisie
Fatma Lakhal
Affiliation:
Laboratoire de Pathologie des Organismes Aquatiques, Institut National Des Sciences et Technologies de la Mer (INSTM), Rue du 2 mars 1934, 2025, Salammbô, Tunisie
Radhia Mraouna
Affiliation:
Laboratoire de Pathologie des Organismes Aquatiques, Institut National Des Sciences et Technologies de la Mer (INSTM), Rue du 2 mars 1934, 2025, Salammbô, Tunisie
Hedia Attia El Hili
Affiliation:
Laboratoire de Pathologie des Organismes Aquatiques, Institut National Des Sciences et Technologies de la Mer (INSTM), Rue du 2 mars 1934, 2025, Salammbô, Tunisie
Christine Paillard
Affiliation:
Institut Européen de la Mer, Laboratoire des Sciences de l'Environnement Marin—LEMAR,UMR 6539, Université de Bretagne Occidentale (CNRS), Technopôle Brest–Iroise, Place Nicolas Copernic, 29280 Plouzané, France
John Klena
Affiliation:
United States Centers for Disease Control and Prevention, Unit 7300, Box 0066, USA
*
Correspondence should be addressed to: M.E. Bour, Laboratoire de Pathologie des Organismes Aquatiques, Institut National Des Sciences et Technologies de la Mer (INSTM), Rue du 2 mars 1934, 2025, Salammbô, Tunisie email: monia.elbour@instm.rnrt.tn

Abstract

Carpet shell clam populations on the Tunisian coastline are susceptible to several microbial pathogen challenges. In this study we report the results of five years' surveillance, conducted from January 2004 till June 2009, for detection of Perkinsosis and brown ring disease (BRD). The survey covered three sites of natural populations of Ruditapes decussatus in a Tunisian lagoon, the North Lake of Tunis. Perkinsosis was detected preferentially in winter periods from the external and marine site, BRD was detected more frequently in the summer periods in a more proximal collection site (in the lake) and was positively correlated with concentrations of heterotrophic Vibrio sp. Our results suggest that several factors other than temperature and salinity might explain spatial distribution variability and natural intensities for these infections in carpet shell clam populations.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2011

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