Contaminated Nutrient Agar Media. The media is contaminated because the media was prepared in Open Place [ normal lab and with so many people was in near of the media. when it was preparing ] not in Laminar flow air Cabinet. Picture is taken by Shabab Mehebub from " Genetic engineering and Biotechnology Lab, East West University " Different Ba c t eria l colony are seen in this Media. Different types of Bacteria are grown in this Media. Some fungi are also grown in this media. In this picture [ From left side ] you can see this. SO, THINK HOW MUCH MICROORGANISMS ARE IN CONTACT WITH US. THIS ARE NOTHING. YOU KNOW?? WE, HUMAN ARE CARRYING 3-6 pounds of BACTERIA. :D :) MICROORGANISMS ARE GOOD FRIEND OF US......