Arizona Esthetics State Board Practice Exam

What type of bacteria are known to have a rod shape?

1. Cocci

2. Bacilli

3. Spirilla

4. Vibrios

The correct answer is: Bacilli

Bacilli are the type of bacteria known for their rod shape. This classification is based on the morphology of the bacteria, which is a critical aspect of microbiology and helps in their identification. Bacilli can vary in length and can be found as single cells or in chains. They are distinct from cocci, which are spherical in shape, and spirilla, which are spiral-shaped. Vibrios, meanwhile, are a specific type of bacilli that are comma-shaped. Understanding these differences in bacterial morphology is essential for estheticians, as it helps in managing and answering questions related to skin care, hygiene, and infections.