ABSTRACT
Alteration of the microbial coenosis and biological activity of different types of soils as well as peculiarities of survival of sanitary-significant and pathogenic microorganisms under the effect of sulphonol and a sulphonol-lead complex have been studied in the laboratory model experiment. The most sensitive tests were as follows: the number of nitrifying bacteria; nitrifying, proteolytic, dehydrogenase and cellulase activity; survival of salmonella and lactose-positive colibacilli. Under the effect of the tested sulphonol (0.5 and 3 mg/l) and lead (0.1 and 2 mg/l) concentrations the self-purification processes in soil were not substantially disturbed, though surfactants negatively affected viability of enterobacteria.
Subject(s)
Benzenesulfonates/pharmacology , Escherichia coli/drug effects , Lead/pharmacology , Salmonella typhimurium/drug effects , Soil Microbiology , Soil Pollutants/pharmacology , Surface-Active Agents/pharmacology , Biodegradation, Environmental/drug effects , Colony Count, Microbial , Dose-Response Relationship, Drug , Ecology , Escherichia coli/enzymology , Salmonella typhimurium/enzymology , Sewage , Time FactorsSubject(s)
Chlorine/pharmacology , Disinfection/methods , Electrolysis , Enterococcus faecalis/pathogenicity , Escherichia coli/pathogenicity , Sterilization/methods , Water Microbiology/standards , Water Supply/standards , Enterococcus faecalis/drug effects , Escherichia coli/drug effects , UkraineABSTRACT
Different methods (methods of discs, of stamps and of minimal inhibitory concentration determination) aimed to determine the Escherichia coli sensitivity to the action of silver on the nutrient media are studied. It is shown possible to use the method of stamps for preliminary estimation under extensive tests. It is established that the data obtained by these methods correlate between themselves with a high degree of trustworthiness and do not correlate with those data obtained in the studies of the antimicrobic action of silver in water.
Subject(s)
Escherichia coli/drug effects , Silver/pharmacology , Microbial Sensitivity Tests/methodsSubject(s)
Conjunctivitis, Bacterial/microbiology , Enterobacteriaceae Infections/microbiology , Escherichia/pathogenicity , Animals , Conjunctivitis, Bacterial/immunology , Enterobacteriaceae Infections/immunology , Environmental Microbiology , Escherichia/classification , Escherichia/isolation & purification , Guinea Pigs , Humans , Immunity/radiation effects , Microwaves/adverse effects , Serotyping , VirulenceSubject(s)
Disease Models, Animal , Escherichia coli Infections/etiology , Escherichia coli/pathogenicity , Keratoconjunctivitis, Infectious/etiology , Animals , Escherichia coli/physiology , Escherichia coli Infections/microbiology , Guinea Pigs , In Vitro Techniques , Keratoconjunctivitis, Infectious/microbiology , Soil Microbiology , Vero Cells , Virulence , Water MicrobiologySubject(s)
Environmental Microbiology , Escherichia/pathogenicity , Animals , Escherichia/isolation & purification , Hemolysis , Humans , Mice , Sheep , VirulenceSubject(s)
Biodegradation, Environmental , Sanitary Engineering , Sewage/analysis , Efficiency , Sanitation , UkraineABSTRACT
A total of 670 washings from various household articles were studied in creches and kindergartens for fecal contamination with the aid of two bacteriological tests (coli and enterococal titres); the degree of their contamination with enterococci and E. coli differed. Strongly contaminated objects (diapers, swaddling tables) were revealed with equal frequency by both tests, but objects assessed as moderately contaminated were more frequently revealed by the enterococcus test (P less than 0.05) than by colimetry. Criteria of evaluation of the quality of washings by the data of enterococcometry are suggested.
