Which type of bacteria can be harmful to humans?

Pathogenic bacteria are those that have the potential to cause disease or harm to humans. They can invade the body, multiply, and produce toxins, leading to various infections and illnesses. These bacteria are responsible for a wide range of health issues, from mild infections to severe diseases.

In contrast, nonpathogenic bacteria are generally harmless and can even be beneficial to human health, playing roles in processes such as digestion and maintaining healthy skin flora. Aerobic bacteria, which require oxygen to grow, can be either pathogenic or nonpathogenic, and their classification does not inherently define their effect on human health. Symbiotic bacteria also coexist with humans in a mutually beneficial relationship, often without causing harm.

Understanding pathogenic bacteria is critical for those involved in hair and beauty services, as it emphasizes the importance of sanitation and hygiene practices to prevent the spread of infections.