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Improved detection of bacteria by flow cytometry using a combination of antibody and viability markers
Author(s) -
Clarke R.G.,
Pinder A.C.
Publication year - 1998
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.1998.00384.x
Subject(s) - flow cytometry , monoclonal antibody , bacteria , salmonella , antibody , microbiology and biotechnology , fluorescence , biology , viability assay , chemistry , cytometry , cell , biochemistry , immunology , genetics , physics , quantum mechanics
A proprietary fluorogenic marker for cell viability (Chemchrome) was investigated for the detection of bacteria using flow cytometry. This marker was used in combination with fluorescently labelled monoclonal antibodies (against Salmonella typhimurium ). Owing to the former's broad band emission spectrum, it was necessary to use the novel dye RED613 for the antibodies. This combined protocol, being sensitive only to the live Salm. typhimurium cells, reduced errors due to intrinsic fluorescence and non‐specific binding. Detection of the order of 100 cells ml −1 was achieved in 30 min. This level was achieved even in the presence of large numbers of non‐target or dead organisms.