Biomaterial Database

[Isolation and germ count of Listeria monocytogenes in raw and biologically treated waste water]. 1984

H H Geuenich, and H E Müller

The concentration of Listeria monocytogenes was determined in 66 samples of waste water and of the effluent after the biological step in the waste water pretreatment plant of Braunschweig. 697 strains of Listeria were isolated, 84 per cent of them were L. monocytogenes. The concentration of Listeria varied between 10(3)-2.4 X 10(5) cells/l. Neglecting some exceptions, there were about ten times more Listeria in the sludge than in the clearly filtered waste water. In general, Listeria seem to be not reduced by the biological oxidation during the waste water treatment. On the contrary, we observed a multiplication in 45 percent of all cases. The propagation of Listeria within amoebae or other protozoa is discussed. Finally, the hygienic role of sludge is discussed because Listeria are concentrated in it and they are able to survive many months up to some years.

UI	MeSH Term	Description	Entries
D008087	Listeria	A genus of bacteria which may be found in the feces of animals and man, on vegetation, and in silage. Its species are parasitic on cold-blooded and warm-blooded animals, including man.
D008089	Listeria monocytogenes	A species of gram-positive, rod-shaped bacteria widely distributed in nature. It has been isolated from sewage, soil, silage, and from feces of healthy animals and man. Infection with this bacterium leads to encephalitis, meningitis, endocarditis, and abortion.
D010084	Oxidation-Reduction	A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).	Redox,Oxidation Reduction
D005374	Filtration	A process of separating particulate matter from a fluid, such as air or a liquid, by passing the fluid carrier through a medium that will not pass the particulates. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Filtrations
D005860	Germany, West	The former Federal Republic of Germany which was reunified with the former German Democratic Republic in 1990.	Federal Republic of Germany,Germany, Federal Republic of
D012722	Sewage	Refuse liquid or waste matter carried off by sewers.	Sludge,Sludge Flocs
D012988	Soil Microbiology	The presence of bacteria, viruses, and fungi in the soil. This term is not restricted to pathogenic organisms.	Microbiology, Soil
D014871	Water Microbiology	The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms.	Microbiology, Water