How Do You Identify Bacteria Growing On Nutrient Agar Plates?
Evaluating bacteria on agar plates is one method of identification used by microbiologists. Colony morphology, or the physical characteristics of bacteria as it multiplies, generally cannot be seen using other diagnostic methods. The shape, color, surface appearance, and even smell of a bacterial colony can help confirm an identification. Nutrient agar plates are used to grow the bacteria so they can be contained in a small visible area for laboratory identification. As scientists collect information, the true identity of the bacteria can be gleaned. Don appropriate lab attire. Put on your lab coat and any other protective gear, such as goggles, gloves, or a mask, required by your lab protocol. Look at the basic form of the bacterial colonies. Determine whether the form is circular, irregular, filamentous, rhizoid, or whatever is the case. You may even have more than one species present on a plate. Determine what the elevation of the colony is. Turn the Petri dish on its side and shine
