Certification Board for Sterile Processing and Distribution (CBSPD) Sterile Processing Technician Practice Exam

Rod-shaped bacteria are classified as what?

1. Bacilli

2. Cocci

3. Spirilli

4. Vibri

The correct answer is: Bacilli

Rod-shaped bacteria are classified as bacilli. This term comes from the Latin word "baculus," which means "small rod." Bacilli can be found in various environments and are often significant in both health and disease. Their rod-like shape contributes to their classification, as it helps differentiate them from other bacterial shapes such as cocci, which are spherical, spirilli, which are spiral-shaped, and vibrio, which are comma-shaped. In identifying bacteria, their morphology plays a crucial role, as it can influence their classification, behavior, and the bacterial infection they might be associated with. Bacilli can exist as single cells or in chains, and some species may also display additional features such as the ability to form spores, which enhances their survival in various conditions. Understanding these classifications is essential for laboratory identification and for implementing appropriate infection control measures.