Microbiology Question: How are Bacillus subtilis and Bacillus megabacterium differentiated on a flowchart? What test or tests would differentiate them other than Voges Proskauer Test? Please explain why. Below are a few flow charts. If there is another flowchart that can differentiate the two, please provide and explain it too. Thank you. Gram Positive Rods ID Flowchart Gram Positive Rods Bacillus spp. ID Flowchart Bacillus spp. I.