Human origin of Bacteroides fragilis bacteriophages present in the environment
Human origin of Bacteroides fragilis bacteriophages present in the environment
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环境中存在的脆弱拟杆菌噬菌体的人类起源
DOI：
10.1128/aem.55.10.2696-2701.1989
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发表时间：
1989
影响因子：
4.4
通讯作者：
J. Jofre
中科院分区：
文献类型：
--
作者：
C. Tartera;F. Lucena;J. Jofre
在具有不同程度的人类粪便污染的水中检测到了脆弱拟杆菌 HSP40 噬菌体。污水中脆弱拟杆菌噬菌体的平均数量达到每 100 毫升水 5.3 x 10(3) 个。我们发现，在仅受生活污水污染的河流中，粪便大肠菌群和粪便链球菌的含量比未经处理的污水低10000倍。此外，屠宰场废水中未发现大量脆弱拟杆菌噬菌体。它们不存在于仅含有野生动物粪便污染的粪便污染水域中。尽管受污染的水中存在的脆弱拟杆菌噬菌体的数量低于大肠杆菌噬菌体的数量，但它们的存在表明存在人类粪便污染。研究还表明，拟杆菌噬菌体只能在有营养物质存在的厌氧条件下繁殖，而不能在自然水体和沉积物中繁殖。
Bacteroides fragilis HSP40 phages have been detected in waters with various levels of fecal contamination of human origin. The average numbers of B. fragilis phages present in sewage water reached 5.3 x 10(3) per 100 ml of water. We found a number 1,000 times lower in a river contaminated with domestic sewage only, in which the levels of fecal coliforms and fecal streptococci were 10,000 times lower than those found in raw sewage. In addition, B. fragilis phages were not found in significant numbers in slaughterhouse wastewaters. They were not present in fecal-polluted waters containing fecal contamination from wildlife only. Although the number of B. fragilis phages present in contaminated waters was lower than the number of coliphages, their presence indicated human fecal contamination. It is also shown that Bacteroides phages are only able to multiply under anaerobic conditions in the presence of nutrients, and they cannot multiply in natural waters and sediments.