Nocardia can be differentiated from other Actinomyces by: (A) ZN staining, (B) Fontana stain, (C) Gram staining, (D) Oxygen requirement
Answer is A. Actinomyces - on ZN staining- central pa as non-acid fast surrounded by acid-fast clubs( antigen-antibody complex ). Nocardia- on ZN staining - acid-fast. Nocardia species are aerobic. Reference: Textbook of Microbiology; Ananthanarayan and paniker's; 10th edition; Pg: 398