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Detection and enumeration of Listeria monocytogenes in a sewage treatment plant in Iraq
Author(s) -
Alghazali M. R.,
Alazawi Salwa K.
Publication year - 1986
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1986.tb01080.x
Subject(s) - sewage , sewage treatment , sewage sludge , listeria monocytogenes , dewatering , environmental science , listeria , biology , environmental engineering , bacteria , engineering , genetics , geotechnical engineering
Listeria monocytogenes was isolated from a sewage treatment plant in Baghdad, Iraq, at all stages of treatment. The treatment processes did not yield a sewage sludge cake or a final discharge free of listerias. The agricultural practice of using such sewage products as fertilizers could become a route of spreading the organism in Iraq, particularly by infecting animals that consume vegetation in fields spread with such sewage. Dewatering of sewage reduced the number of L. monocytogenes but long periods of exposure to sun would be needed to obtain a ‘safe’ sewage sludge cake.