Combined Effect of Environmental Factors on Spoilage Bacteria
Combined Effect of Environmental Factors on Spoilage Bacteria
Date
1991
Authors
Chandrasekharan, M
Lakshmanaperumalsamy, P
Chandramohan’, D
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India) Cochin
Abstract
Effect of environmental factors such as temperature,pH and sodium chloride concentrations,
individually and at various combinations, on the growth and survival of spoilage bacteria
was studied in flesh broth and Zobells broth. Eight isolates, belonging to three different
genera namely, Pseudomonas, Vibrio and Acinetobacter, harvested from spoiled Penaeus
indicus were stored at 5,15,30,35 and 50°C, pH 2,4,6,8,10 and 12 and sodium chloride
concentrations of 0,1,3,6,10 and 15%. Optimum growth for all the isolates was found to
vary from 15 to 45°C and pH from 5-10. The growth pattern of all the isolates, in rcsponse
to various sodium chloride concentrations was not similar in flesh broth and Zobells broth.
Optimum sodium chloride concentration was found to vary from 1 to 6%. Influence of
more than one environmental factor on the growth of spoilage bacteria was tested at
various levels in flesh media by maintaining one of the factors constant and altering the
other two. Results suggested that at extreme conditions each individual factor had an
independent influence on the growth of bacteria.
Description
Keywords
Combined Effect ,Environmental Factors,Spoilage Bacteria
Citation
Fishery Tech 28(2):148-153