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Survival of E. coli O157:H12 in creek sediments after inoculation and re-inoculation
被引:2
|作者:
Pachepsky, Y. A.
[1
]
Garzio-Hadzick, A.
[2
]
Shelton, D. R.
[1
]
Hadzick, Z. Z.
[2
]
Hill, R. L.
[3
]
机构:
[1] USDA ARS, Environm Microbial & Food Safety Lab, Beltsville, MD 20705 USA
[2] Univ Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109 USA
[3] Univ Maryland, Dept Environm Sci & Technol, College Pk, MD 20742 USA
关键词:
Escherichia coli;
sediment;
survival;
microcosm;
inactivation rate;
FECAL INDICATOR BACTERIA;
ESCHERICHIA-COLI;
WATER-QUALITY;
LAKE GENEVA;
PERSISTENCE;
STREAMS;
IMPACT;
GROWTH;
TEMPERATURE;
SWITZERLAND;
D O I:
10.1504/IJEP.2011.045481
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
This work tested the hypothesis that E. coli survival after streambed sediment inoculation does not differ significantly from survival in the same sediment after re-inoculation. The E. coli O157:H12 survived in two sediments with markedly different particle size distributions and organic matter contents in one-month-long experiments in flow-through chambers at 14 degrees C and 23 degrees C.The inactivation rates after re-inoculation were smaller than after inoculation; the differences were significant (P < 0.1) in two of four experiments. This study suggests that E. coli O157:H12 was able to adapt to the sediment environment so that its survival after re-inoculation improved.
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页码:234 / 245
页数:12
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