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Lactic acid bacteria increase the resistance of turbot larvae, Scophthalmus maximus, against pathogenic vibrio

Published online by Cambridge University Press:  15 October 1994

François-Joël Gatesoupe
François-Joël Gatesoupe*
Affiliation:
Unité Mixte de Nutrition des Poissons INRA-IFREMER, IFREMER, Centre de Brest, BP 70, 29280 Plouzané, France
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Abstract

Characteristics of Lactic Acid Bacteria (LAB) isolated from rotifers, Brachionus plicutilis, resembled those of Lactobacillus plantarum or Carnobacterium sp. It was investigated whether the artificial maintenance of a high concentration of LAB in rotifers might increase their dietary value for turbot larvae, particularly when the fish were infected with pathogenic Vibrio sp. One LAB strain was cultivated, then introduced daily into the enrichment medium of rotifers. In this way, LAB were retrieved in large amounts in turbot, and a significant limitation of larval mortality rate was observed when turbot were challenged with pathogenic vibrio at day 9. The inoculum concentration of LAB had a decisive effect on survival rate, and the optimum was between 107 and 2 × 107 Colony Forming Units (CFU) daily added per ml of the enrichment medium (53% survival rate after 72 h of challenge, versus 8% for the infected control group without LAB).

Keywords

Lactic acid bacteriavibriopathogenrotiferexperimental infectionlarval fish cultureturbotPleuronectiformesBactéries lactiquesvibrionpathogènerotifèreinfection expérimentalelarve de turbotPleuronectiformes
Type
Research Article
Information
Aquatic Living Resources , Volume 7 , Issue 4 , October 1994 , pp. 277 - 282
Copyright
© IFREMER-Gauthier-Villars, 1994

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