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Survival of Fish‐Pathogenic Strains of Aeromonas hydrophila under Starvation
Author(s) -
Zhang Xiaojun,
Cai Wenlong,
Tao Zhen,
Arias Cova R.
Publication year - 2014
Publication title -
journal of aquatic animal health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 52
eISSN - 1548-8667
pISSN - 0899-7659
DOI - 10.1080/08997659.2014.922515
Subject(s) - aeromonas hydrophila , ictalurus , catfish , cyprinus , biology , common carp , microbiology and biotechnology , carp , aeromonas , fish <actinopterygii> , zoology , fishery , bacteria , genetics
The survival of Aeromonas hydrophila under low‐nutrient conditions was investigated in this study. The behavior of three strains isolated from Common Carp Cyprinus carpio (China) and Channel Catfish Ictalurus punctatus (USA) was compared when cells were starved at different temperatures (4, 15, 25, and 35°C) over a 4‐week period. Temperature played a major role in cell survival, and cell viability decreased rapidly at 4°C. Conversely, cells stored at 15°C did not lose viability over time. Warmer temperatures (25°C and 35°C) decreased cell numbers by approximately one order of magnitude. Ultrastructural changes in cell morphology were observed in starved cells. Our data confirm that A. hydrophila can persist in the aquatic environment for extended periods, but survival is strongly influenced by temperature. Received December 13, 2013; accepted March 22, 2014