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InTray GC is used, like conventional Thayer-Martin media plates, to grow Neisseria gonomhoeae and similar organisms.

The InTray GC contains a Modified Thayer-Martin (MTM) medium within a sealed inner well. It has a two inch diameter well and 5-6ml of media. The inner seal that covers this well also covers another sealed cavity containing a CO2 generating tablet. There is also an outer adhesive label seal with a window that does not fog up under 100% relative humidity. The user opens and reseals this outer label. In practice, when the user opens the outer seal, he may then remove and discard the inner seal exposing the surface of the medium and the sealed cavity. The next step is to inoculate the surface of the medium with the patient sample. Next, puncture the seal over the cavity with any convenient sharp point. Finally, reseal the outer label over the InTray. High humidity within the InTray causes the tablet to generate CO2. Incubate the InTray and observe the growth of organisms through the window without opening the InTray and therefore without disturbing the atmosphere. Observation can be by eye, hand lens or microscope. This packaging has been used since 1994 for other BioMed media products.