Which type of bacteria can be harmful and lead to diseases in humans?

Pathogenic bacteria are specifically known for their ability to cause disease in humans. These microorganisms can invade the body, reproduce, and produce toxins, which can lead to a variety of health issues. Understanding the distinction between pathogenic and nonpathogenic bacteria is crucial for cosmetology professionals, as it aids in maintaining hygiene and preventing infections in clients.

Nonpathogenic bacteria, by contrast, do not cause diseases and can even be beneficial; for example, they are involved in processes like fermentation and assisting in digestion. Staphylococci is a type of bacteria that includes both pathogenic and nonpathogenic strains, but it is particularly relevant in discussions of skin infections. Fungi, while they can also be harmful, are not categorized as bacteria; they include a separate group of organisms. Focusing on pathogenic bacteria is vital in a cosmetology setting to ensure safety and health standards are met when providing services.