two culture media plate showing bacterial growth inhibition antibacterial sensitivity

agar analyzing antibacterial antibiotic aureus bacteria bacterial bacterium biochemistry biology coli colony culture diphtheria disease drug escherichia exam experiment growth identification identify infection infectious inhibition laboratory media medical medicine medium meningitis micro microbiology mold mycobacterium organism plate research resistance science scientific sensitivity sepsis septicemia showing staphylococcus streptococcus susceptibility test two yeast zone