Oregon Cosmetology Certification Practice Exam

Spirilla is the correct option because it describes the shape of the bacteria cell which is coiled and corkscrew-like. Option A, Bacillus, typically describes a rod-shaped bacteria cell, while option B, Coccus, describes a spherical-shaped bacteria cell. Option D, Vibrio, refers to a comma-shaped bacteria cell. Therefore, none of the other options accurately describe the shape of the bacteria cell that causes syphilis and cholera.