Rapid, Sensitive, and Specific Escherichia coli H Antigen Typing by Matrix-Assisted Laser Desorption Ionization?Time of Flight-Based Peptide Mass Fingerprinting.
Huixia Chui, Michael Chan, Drexler Hernandez, Patrick Chong, Stuart McCorrister, Alyssia Robinson, Matthew Walker, Lorea A. M. Peterson, Sam Ratnam, David J. M. Haldane, Sadjia Bekal, John Wylie, Linda Chui, Garrett Westmacott, Bianli Xu, Mike Drebot, Celine Nadon, J. David Knox, Gehua Wang and Keding Cheng
J. Clin. Microbiol. (2015), vol. 53, 2480-2485
This paper describes a rapid method to identify the Escherichia coli flagellar antigen (H antigen) at the subspecies level using a MALDI-TOF MS platform with high specificity and sensitivity.
The results from the comparison of MALDI-TOF MS and serotyping show that the MALDI-TOF MS method is an accurate and sensitive approach for E. coli H antigen identification and typing. Reference strains representing all 53 E. coli H types were identified correctly by MALDI-TOF MS. Of 85 clinical isolates tested by MALDI-TOF MS-H, 75 identified MS-H types (88.2%) matched results obtained from traditional serotyping. This new method had a much shorter turnaround time, higher throughput, and lower cost than serotyping. |
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