OSOM Ultra Strep A Test, Room Temperature Storage. Two-color results, easy-to-use, results in minutes. Studies have shown that the sensitivity of the OSOM Ultra Strep A Test and the standard single swab culture method are not statistically different. Finally, an Ultra-Sensitive Strep A test with the ease of use and rapid results your busy practice needs. Packaging: 50 Test/Kit, 18 Kits/Case.