piece of bread with mold aspergillus fumigatus in a petri dish next to tweezers on a blue background. organic, medical

mold bread tweezers fungal mycelium petri moldy dish biology fungus microbiology colony growing laboratory science aspergillus fumigatus allergy disease medicine sample microbe microorganism allergen macro piece spore closeup culture degradation organism unsanitary penicillin unpleasant food bad disgusting education medical stale product rotting hazardous toxic poisonous rotten