The organism that does not infect hair is: (A) Trichophyton rubrum, (B) Epidermophyton floccosum, (C) Microsporum, (D) All
Answer is B. Trichophyton- hair, skin and nail. Microsporum- hair and skin. Epidermophyton- skin and nail. Reference: Textbook of Microbiology; Baveja; 4th edition .