We used to procure OXOID oxidase strips, for which a small piece of paper could be used for multiple colonies. We have not been able to procure these for the last two years, and are finding that the only ones available (with approx 5 mm squared space for testing, i.e. one sample per strip) are substantially less economical.

Does anyone have any alternative brands where the entire strip can be used for testing?

Many thanks in advance!