Regarding the company that makes the oxidase stick, here is the distributor: Oxoid Canada 217 Colonnade Rd nepean Ontario K2E7K3 Phone 1-613-226-1318 or 1-800-648-3726. The cost is around $43.00 per 100 sticks. Again, we like the sticks ....they are very easy for students to use and we have excellent results with them. Phyllis at Sinclair in Dayton