Texas Esthetician License Practice Exam

Which type of bacteria is responsible for causing abscesses, pustules, and boils?

1. Streptococci

2. Bacilli

3. Staphylococci

4. Spirilla

The correct answer is: Staphylococci

The type of bacteria responsible for causing abscesses, pustules, and boils is Staphylococci. This group of bacteria, particularly Staphylococcus aureus, is known for its ability to infect skin and soft tissue, leading to the formation of pus-filled lesions. These conditions arise because Staphylococci can invade the skin through breaks or cuts, prompting the body’s immune response. This immune response often results in inflammation and pus accumulation, which manifests as abscesses or boils. In contrast, Streptococci are more commonly associated with other types of infections, such as strep throat and certain skin infections but do not primarily cause abscesses or boils. Bacilli refer to rod-shaped bacteria that can include various species, some of which can cause infections, but they are less directly linked to skin abscesses. Spirilla are spiral-shaped bacteria that are far less common and are typically not associated with these types of skin conditions either. Therefore, Staphylococci is the correct answer because of its direct role in skin infections leading to pus formation.