bacterial culture growth on macconkey agar (gram negative bacilli)contains small light grains. focus on all agar surface.

agar air aureus background bacteria bacterial bacterium biology biotechnology black blood cell colony color culture danger diagnostic disc fecal food growth health healthcare hygiene isolate isolated isolation lab laboratory media medical medicine medium micro microbe microbiology pathogen pathogens petri plate plates red research risk safety salmonela science scientific shigella streak test treat urine vibrio yellow