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Updated: Aug 13, 2026

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method
Published on: April 18, 2019
Development of a novel assay method for colistin sulphomethate
M Wootton1, H A Holt, A P Macgowan
1Bristol Centre for Antimicrobial Research and Evaluation, Southmead Hospital, North Bristol Healthcare Trust, Westbury-on-Trym, Bristol BS 5NB, UK. mandy.wootton@bristol.ac.uk
Abstract:
Increased use of colistin therapy for infections caused by Pseudomonas aeruginosa has indicated a need for a more robust microbiological assay technique. This report describes a quick and simple microbiological assay for quantifying levels of colistin sulphomethate in serum and urine samples from cystic fibrosis patients. The technique uses no specialised or costly equipment and is suitable for use in all routine diagnostic microbiology laboratories.

