penicillium expansum grows in malt extract agar media with petri dish use for isolating cultivate yeasts, black mold and fungal te

agar alcohol anaerobic aseptic autoclave background bacteria biology black closeup colonies colony corona counter culture disease dish ecoli enterovirus escherichia extract food fungal fungi fungus gram green growth hands health healthy hygiene infected infection isolated lab laboratory malt media medical medicine microbiology mold negative petri plate research science selective species spread technique test virus