Iowa Barber Practice Exam

Spirilla is a bacterial genus classified under the spirochete phylum. While options A, C, and D are all caused by bacteria, they belong to different taxonomic groups and not Spirilla in particular. Tuberculosis is caused by Mycobacterium species, Staphylococcus is a type of cocci bacteria, and Herpes is a virus. Therefore, the only correct answer is option B, Syphilis.