<prompt> False about bacillus anthrax isGram negativeBacilli in long chainNon haemolytic colony in blood agarMedusa head appearance on nutrient agar  <response>: The Bacillus anthrax is one of the largest of pathogenic bacteria. It is Gram-positive but tends to be decolorized easily so as to appear Gram-variable or even Gram-negative. It is non-acid fast. It is non-motile. Reference: Textbook of microbiology; Ananthanarayan and panikers; 10th Edition; Pg: 249 