Analysis of Microbial Cell Viability in a Liquid Using an Acoustic Sensor.
Ultrasound Med Biol
; 46(4): 1026-1039, 2020 04.
Article
en En
| MEDLINE
| ID: mdl-31932157
A method was developed for the rapid analysis and evaluation of the viability of bacteriophage-infected Escherichia coli (E.coli) XL-1 directly in a conducting suspension by using a slot-mode sensor. The method is based on recording the changes in the depth and frequency of resonant absorption peaks in the frequency dependence of the insertion loss of the sensor before and after the biologic interaction of E. coli with specific bacteriophages. The possibility was shown of recording the infection of E. coli with specific bacteriophages and assessing its viability in suspensions with a conductivity of 4.5-30 µS/cm. Сontrol experiments were carried out with non-specific interactions of E. coli cells with bacteriophages, in which no changes in the sensor variables were observed. The optimal informational variable for estimating the number of viable cells was the degree of change in the depth of the resonant peaks in the frequency dependence of the insertion loss of the sensor. The limit of cell detection was â¼102-103 cells mL-1, with an analysis time of about 5 min. An additional advantage of the sensor was the availability of a removable liquid container, which allows one to use it repeatedly and to facilitate the cleaning of the container from spent samples. The results are promising for the detection of bacteria and assessment of their viability in solutions with conductivity in the range 4.5-30 µS/cm.
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Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Acústica
/
Escherichia coli
/
Carga Bacteriana
Idioma:
En
Revista:
Ultrasound Med Biol
Año:
2020
Tipo del documento:
Article
Pais de publicación:
Reino Unido