Discrimination of infectious bacteriophage T4 virus by propidium monoazide real-time PCR

The advent of quantitative PCR has improved the detection of human viral pathogens in the environment. However, a serious limitation of this method may arise from the inability to discriminate between viruses that are infectious and viruses that have been inactivated and do not represent a human hea...

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Veröffentlicht in:Journal of virological methods 2010-09, Vol.168 (1), p.228-232
Hauptverfasser: Fittipaldi, Mariana, Rodriguez, Nancy J. Pino, Codony, Francesc, Adrados, Bárbara, Peñuela, Gustavo A., Morató, Jordi
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container_issue 1
container_start_page 228
container_title Journal of virological methods
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creator Fittipaldi, Mariana
Rodriguez, Nancy J. Pino
Codony, Francesc
Adrados, Bárbara
Peñuela, Gustavo A.
Morató, Jordi
description The advent of quantitative PCR has improved the detection of human viral pathogens in the environment. However, a serious limitation of this method may arise from the inability to discriminate between viruses that are infectious and viruses that have been inactivated and do not represent a human health hazard. To assess whether propidium monoazide (PMA) pre-treatment is a good approach to inhibiting DNA amplification from non-infectious viruses, bacteriophage T4 survival was measured using cell culture titration and real-time PCR with and without PMA pre-treatment. Heat (85 °C) and proteolysis methods were carried out. After these inactivation treatments, the results indicated that the PMA pre-treatment approach is not appropriate for differentiating infectious viruses. However, when a heat treatment at 110 °C was undertaken, PMA pre-treatment did allow differentiation of non-infectious from infectious viruses. In this case, effective binding of PMA to bacteriophage T4 DNA could be taken to indicate capsid damage. Therefore, PMA pre-treatment may be appropriate for assessing effective disinfection treatments and for a more reliable understanding of the factors that contribute to viral inactivation through capsid damage monitoring. The PMA-PCR approach could be useful as a rapid and inexpensive analytical tool for screening and evaluation of the efficacy of disinfectants.
doi_str_mv 10.1016/j.jviromet.2010.06.011
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subjects Azides - metabolism
Bacteria
Bacteriologia
Bacteriology
Bacteriophage T4
Bacteriophage T4 - growth & development
Bacteriophage T4 - isolation & purification
Biological and medical sciences
Capsids
Ciències de la salut
Fundamental and applied biological sciences. Psychology
Hot Temperature
Humans
Intercalating Agents - metabolism
Medicina
Microbial Viability
Microbiology
PMA
Polymerase Chain Reaction - methods
Propidium - analogs & derivatives
Propidium - metabolism
Real-time PCR
Sensitivity and Specificity
Specimen Handling - methods
Techniques used in virology
Virology
Virology - methods
Virus
Virus infectivity
Viruses
Àrees temàtiques de la UPC
title Discrimination of infectious bacteriophage T4 virus by propidium monoazide real-time PCR
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