Gram Stain - Bacteria Identification Algorithm Gram Positive: • Rods: Oxidase+, Oxidase-, Fastidious, Anaerobic, Curved • Cocci: Anaerobes Gram Negative: • Rods: Branching, Spores, Acid-fast, Catalase+, Catalase- • Cocci: Catalase+, Catalase- Satyendra Dhar, MD @DharSaty #Gram #Stain #Bacteria #Identification #Algorithm #microbiology #diagnosis