Displaying items by tag: surface

Contact Plates – as mentioned are special Petri dishes which contain sterile growth medium prepared in a manner so the surface of the media protrudes above the rim of the plate. The contact plate is pressed against any flat surface the needs to be sampled. Any viable microorganisms on the surface will stick to the agar surface and will grow upon proper incubation. This technique reveals the number of viable microorganisms on a surface.