The E. coli swab was developed by Micro Food Labs as a rapid assessment to detect the presence or absence of E. coli bacteria. The swab provides an indication for the user to determine if further testing is required, based on the outcome of the test. The swab works on the principal that a sample is collected, and incubated for a period of between 18 − 24 hours, to allow any E. coli present to reproduce to determine if there is E. coli present or not.