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Biomedical subjects

A J Drapeau

Publications and source records attributed to A J Drapeau.

7 recordsLinked to original sources
PubMed1978

Yersinia enterocolitica: serotypes and biotypes isolated from humans and the environment in Quebec, Canada.

Thirty-one strains of Yersinia enterocolitica were isolated from food and surface water. During the period of January 1975 to June 1977, 157 strains from 143 human cases were also isolated. Among the different serotypes from nonhuman sources, serotypes 6,30 and 4,32 were the most common. Serotype 4,32 was present only in food and not in water. Serotype 3 was isolated only from humans. Among the different serotypes from human cases, 73.9% belonged to serotype 3. Only serotype 3 was isolated from children under 4 years old. The presence of other serotypes increased and that of serotype 3 decreased in frequency as the age progressed. No serotype 3 was isolated from human cases aged 50 years and more.

Adolescent↗
PubMedDate not supplied

[Compared survival of "Escherichia coli" and "Salmonella typhi-murium" in cold water (author's transl)].

The survival rates of Escherichia coli and Salmonella typhi-murium in water are studied at 4, 10 and 20 degrees C and pH 6 and 8, either separately or in mixed culture at four different ratios. S. typhi-murium's survival rate is enhanced at pH 6 and low water temperature. The value of traditional microbiological indicators in assessed in cold water conditions.

Cold Temperature↗
PubMedDate not supplied

[Attempted characterization of microorganisms by their metallic profiles].

Ten medically or environmentally significant strains of bacteria were assessed as to their metallic content (Be, Mg, Cr, Mn, Fe, Co, Cu, Zn, Cd and Pb). Metallic detection was performed using a carbon rod-equipped atomic absorption spectrophotometer. Experimental parameters such as heavy metal content of initial culture medium, incubation, "red fuming" nitric acid digestion times, evaporative losses (and their individual correction) plus primary sample dilutions, were standardized. For the ten strains studied, characteristic metallic profiles were observed. More work is needed to assess the taxonomic and epidemiologic significance of metallic profiles of microorganisms.

Bacteria↗
PubMedDate not supplied

[Survival of "Pseudomonas aeruginosa" and "Escherichia coli" in cold water (author's transl)].

The survival rates of Escherichia coli and Pseudomonas aeruginosa in water were studied and compared at 4, 10 and 20 degrees C and pH 6 and 8, either separately or in mixed culture at four different concentration ratios. Under ceratin experimental conditions, the temperature, the pH and the bacterial concentration exerted a marked influence on the survival rate. At 4 degrees C, P. aeruginosa may be substituted to E. coli as an effective micriobiological pollution indicator.

Cold Temperature↗