<prompt> Nocardia can be differentiated from other Actinomyces byZN stainingFontana stainGram stainingOxygen requirement  <response>: 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 panikers; 10th edition; Pg: 398 