Which statement about nonpathogenic microorganisms is true?

Which statement about nonpathogenic microorganisms is true?

• A. They always cause disease
• B. They are the same as pathogens
• C. They may perform useful functions
• D. They are never present in healthy individuals

Answer: (C)

Nonpathogenic microorganisms are those that do not cause disease in a healthy person, and many of them actually help keep us healthy. They can perform useful functions such as aiding digestion, producing vitamins, and forming protective communities on the skin and mucous membranes. In the context of PMU, this idea supports why strict hygiene and aseptic technique are essential: even though most nonpathogenic microbes aren’t disease-causing, we still control microbes to prevent any potential opportunistic infections and to keep the procedure area clean and safe. The other statements miss important realities. Not all microorganisms cause disease, so stating they always do is incorrect. Nonpathogenic means they are not the same as pathogens, which are disease-causing organisms. And they are not never present in healthy individuals; normal flora on our skin and in our bodies illustrates that harmless microbes are commonly present.

Nonpathogenic microorganisms are those that do not cause disease in a healthy person, and many of them actually help keep us healthy. They can perform useful functions such as aiding digestion, producing vitamins, and forming protective communities on the skin and mucous membranes. In the context of PMU, this idea supports why strict hygiene and aseptic technique are essential: even though most nonpathogenic microbes aren’t disease-causing, we still control microbes to prevent any potential opportunistic infections and to keep the procedure area clean and safe.

The other statements miss important realities. Not all microorganisms cause disease, so stating they always do is incorrect. Nonpathogenic means they are not the same as pathogens, which are disease-causing organisms. And they are not never present in healthy individuals; normal flora on our skin and in our bodies illustrates that harmless microbes are commonly present.