Medusahead colonies on nutrient agar point the diagnosis of infection with: (A) Bacillus anthracis, (B) Bacillus cereus, (C) Anthracoid bacilli, (D) Clostridium per fringes
Answer is A. Bacillus anthracis-medusa hair appearance like growth on nutrient agar Ref: Textbook of Microbiology Baveja 5th ed Pg 220