Namdari H, Cabelli V J
Department of Microbiology, University of Rhode Island, Kingston 02881-0812.
Appl Environ Microbiol. 1989 Mar;55(3):543-7. doi: 10.1128/aem.55.3.543-547.1989.
Certain strains of motile Aeromonas species, including all those of Aeromonas caviae examined, were shown to be suicidal. When they were grown in the presence of glucose at both 30 and 37 degrees C, there was rapid die-off of the organisms after 12 h of incubation, and viable cells generally could not be recovered after 24 h. It was shown that this phenomenon was due to the production of relatively high levels of acetic acid by these strains, even during growth under highly aerobic conditions, and to the greater susceptibility of these strains to acetic acid-mediated death. Suicide did not occur when the pH was maintained above 6.5 or in the presence of high concentration of Pi. These observations were consistent with our inability to isolate suicidal Aeromonas spp. from acidic lakes in New England and with their recovery from alkaline waters in Israel and from sewage. Suicidal aeromonads appear to be better adapted than the nonsuicidal biotypes to anaerobic growth in low-nutrient environments.
某些运动性气单胞菌菌株，包括所有检测过的豚鼠气单胞菌菌株，被证明具有自杀性。当它们在30℃和37℃下于葡萄糖存在的条件下生长时，培养12小时后细菌迅速死亡，24小时后通常无法回收存活细胞。结果表明，这种现象是由于这些菌株即使在高度需氧条件下生长时也会产生相对高水平的乙酸，以及这些菌株对乙酸介导的死亡更敏感。当pH维持在6.5以上或存在高浓度的磷酸盐时，自杀现象不会发生。这些观察结果与我们无法从新英格兰的酸性湖泊中分离出自杀性气单胞菌以及它们能从以色列的碱性水域和污水中回收的情况一致。与非自杀性生物型相比，自杀性气单胞菌似乎更能适应低营养环境中的厌氧生长。
