Asian Fisheries Society

Optimum Temperatures for the Peak Growth of Some Selected Bacterial Fish Pathogens

Abstract:

The optimal growth temperatures for 24 strains of 15 bacterial fish pathogens were determined under uniform cultural conditions. For Flavobacterium psychrophila, peak growth temperature (tpeak) was 21±0.4ºC for the strain tested. Flavobacterium colum-naris exhibited 29.8±0.2 and 29.9±0.3ºC, respectively, as tpeaks for two strains. The tpeaks of Flavobacterium branchiophilum were 24.9±0.2 and 24.1±0.5ºC, respectively, for two strains. Three strains of Edwardsiella tarda were examined and they showed tpeaks at 36.1±0.4, 35.5±0.2 and 36±0.3ºC, respectively. Citrobacter freundii showed its tpeak at 36.1±0.4ºC. For Aeromonas hydrophila, two strains were tested and it was found that tpeaks were 32.9±0.6 and 34.8±0.5ºC, respectively. The tpeaks of Aeromonas salmonicida were 26.1±0.4 and 25.6±0.2ºC, respectively. Temperature 27.8±0.3ºC was found as tpeak of a Vibrio anguillarum strain while Vibrio ordalii strain exhibited it at 26.5±0.4ºC. Peak growth at temperatures of 26.7±0.5 and 27.6±0.4ºC, respectively, was found for Photo-bacterium damselae (formerly Pasteurella piscicida). In Pseudomonas fluorescens, the peak growth occurred at temperatures of 29.9±0.2 and 28.5±0.3ºC, respectively. Pseudo-monas sp. showed tpeaks at 24.9±0.1 and 29.2±0.5ºC, respectively. The peak growth for the two strains of Lactococcus garvieae (formerly Enterococcus seriolicida) was at tempera-tures of 29.7±0.4 and 31.1±0.2ºC, respectively where the Streptococcus sp. showed tpeak at 28.3±0.5ºC.

Publication Date : 2008-06-19

Volume : 21

Issue : 2

Page : 205-214

Full text PDF
Date 2008/06/19
Abstract Hits 2292
Downloads 1686