热带淡水中特定粪便细菌的存活模式。
The survival patterns of selected faecal bacteria in tropical fresh waters.
作者信息
Wright R C
机构信息
UNICEF, Freetown, Sierra Leone.
出版信息
Epidemiol Infect. 1989 Dec;103(3):603-11. doi: 10.1017/s0950268800031009.
Abstract
The survival of various faecal bacteria used as indicators of the faecal contamination of water supplies has been investigated in a tropical environment (Sierra Leone). Isolates representing the thermotolerant coliform (TtC) and faecal streptococcus (FS) groups, Clostridium perfringens and Salmonella spp. were studied over a 48 h period of immersion in water from three different sources. Survival patterns varied according to source type, but some general observations were made: a portion of the TtC group was apparently capable of substantial regrowth; FS organisms died off at a faster rate than TtC organisms initially, but survived longer; vegetative cells of C. perfringens died off rapidly; and Salmonella spp. could survive for as long as the other faecal organisms tested. The implications of results for the analysis of tropical waters for faecal contamination are discussed.
摘要
在热带环境（塞拉利昂）中，对用作水源粪便污染指示菌的各种粪便细菌的存活情况进行了调查。研究了代表耐热大肠菌群（TtC）和粪链球菌（FS）组、产气荚膜梭菌和沙门氏菌属的分离株，将其浸入三种不同水源的水中48小时。存活模式因水源类型而异，但有一些一般性观察结果：一部分TtC组细菌显然能够大量再生长；FS菌最初比TtC菌死亡速度更快，但存活时间更长；产气荚膜梭菌的营养细胞迅速死亡；沙门氏菌属的存活时间与其他受试粪便生物一样长。讨论了这些结果对热带水域粪便污染分析的意义。
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