Washington Master Esthetics Practice Exam

Which type of bacteria is known to frequently cause skin infections?

1. Lactobacillus

2. Escherichia coli

3. Staphylococcus aureus

4. Bacillus cereus

The correct answer is: Staphylococcus aureus

Staphylococcus aureus is a type of bacteria that is commonly associated with skin infections. This bacterium can cause a variety of skin-related issues, including boils, cellulitis, impetigo, and abscesses. It is often present on the skin's surface and can enter the body through cuts or abrasions, leading to infections when the skin's barrier is compromised. The ability of Staphylococcus aureus to form colonies and produce toxins makes it particularly virulent, which is a significant reason why it is so frequently responsible for skin infections. The other options also represent types of bacteria, but they are not as commonly linked to skin infections. Lactobacillus, for instance, is generally found in the gut and is beneficial for digestive health. Escherichia coli primarily resides in the intestines and is usually associated with gastrointestinal infections rather than skin issues. Bacillus cereus is known for causing food poisoning and is not primarily a skin pathogen. Hence, Staphylococcus aureus stands out as the bacteria that is most frequently involved in skin infections.