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MICROORGANISM CONCENTRATION [3 records]

Record 1 2026-03-03

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Wastewater Treatment
  • Collaboration with Health Canada
CONT

Primary disinfection is the application of a disinfectant in the drinking water treatment plant, with a primary objective to achieve the necessary microbial inactivation. The efficacy of disinfection using chlorine can be predicted based on a knowledge of the residual free chlorine concentration, temperature, pH, and contact time. This relationship is commonly referred to as the CT concept and is used by public drinking water suppliers as one tool for ensuring adequate inactivation of organisms during disinfection. CT is the product of the residual concentration of disinfectant(C), measured in mg/L at the outlet of the contact chamber, and the disinfectant contact time(T), measured in minutes. The CT values required to achieve the necessary inactivation will depend on the microorganism targeted, pH, and temperature.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Traitement des eaux usées
  • Collaboration avec Santé Canada
CONT

La désinfection primaire consiste à utiliser un désinfectant dans une usine de traitement de l'eau potable dans le but premier d'inactiver les pathogènes microbiens. Il est possible de prédire l'efficacité d'une désinfection au chlore d'après la concentration résiduelle de chlore libre, la température, le pH et le temps de contact. Cette relation est communément appelée le critère CT et les fournisseurs publics d'eau potable s'en servent pour assurer l'inactivation adéquate des organismes pendant la désinfection. Le CT correspond à la concentration résiduelle (C) de désinfectant, en mg/L, mesurée à la sortie du bassin de chloration, multipliée par le temps de contact (T) avec le désinfectant, en minutes. La valeur CT requise pour parvenir à l'inactivation nécessaire varie selon le microorganisme ciblé, le pH et la température.

Spanish

Save record 1

Record 2 2021-12-20

English

Subject field(s)
  • Diagnostic Procedures (Medicine)
  • Microbiology and Parasitology
  • Pharmacology
DEF

A test for antimicrobial resistance to antibiotic therapy in which a specimen containing a microorganism is placed on a plastic strip containing graded levels of an antibiotic, and the concentration of the antibiotic that inhibits growth is documented.

French

Domaine(s)
  • Méthodes diagnostiques (Médecine)
  • Microbiologie et parasitologie
  • Pharmacologie

Spanish

Campo(s) temático(s)
  • Procedimientos diagnósticos (Medicina)
  • Microbiología y parasitología
  • Farmacología
CONT

[...] además, en aquellos artículos en los que se utilizó una técnica basada en cultivo para determinar susceptibilidad antimicrobiana (previa a la detección de mutaciones asociadas a resistencia) fueron más comúnmente usadas técnicas como la prueba del epsilómetro (E-test) o difusión en disco, debido a que son de más fácil implementación.

Save record 2

Record 3 1987-04-30

English

Subject field(s)
  • Medical and Surgical Equipment
  • Equipment (Chemistry)
OBS

In agar or broth dilution tests, serial dilutions of an antibacterial agent are prepared in agar or broth, respectively, and are inoculated with a suspension of a known concentration of a microorganism. Following incubation, the lowest concentration at which there is no visible growth is determined.

French

Domaine(s)
  • Équipement médico-chirurgical
  • Équipement (Chimie)

Spanish

Save record 3

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