pathogenic bacteria

Pathogenic bacteria are microorganisms capable of causing disease in humans, animals, or plants. They invade the body, multiply, and may produce toxins that harm tissues or disrupt normal functions. Not all bacteria are harmful; many are beneficial or harmless. Pathogenic bacteria can enter the body through contaminated food, water, surfaces, or direct contact, leading to illnesses such as infections, food poisoning, or respiratory diseases. Understanding these bacteria helps us prevent and treat infections through hygiene, sanitation, and antibiotics when necessary.