GOOD & BAD BACTERIA

 PRERNA FOR IAS

GOOD & BAD BACTERIA

(BIOLOGY)

1. Good / Beneficial Bacteria

Good bacteria, also known as beneficial bacteria, are microorganisms that support human health and help maintain balance within the body. They naturally live in areas such as the gut, skin, and mouth. In the digestive system, they assist in breaking down food, producing vitamins, and supporting nutrient absorption. Beneficial bacteria also strengthen the body's natural defenses by preventing harmful microbes from multiplying. They play an important role in regulating the immune system and reducing inflammation. Common examples include Lactobacillus and Bifidobacterium. A healthy population of beneficial bacteria contributes significantly to overall well-being and disease prevention.

2. Bad / Harmful Bacteria

Bad bacteria, also called pathogenic bacteria, are microorganisms that can cause infections and diseases. Unlike beneficial bacteria, they invade tissues, multiply rapidly, and release toxins that damage cells. Harmful bacteria can infect different parts of the body, including the gut, skin, lungs, and bloodstream. They often trigger inflammation, pain, fever, and other disease symptoms. Examples include Salmonella, Staphylococcus aureus, and My