Here's a breakdown:
* Harmful organisms: These are usually microscopic, such as bacteria, viruses, fungi, and parasites.
* Growth and spread: These organisms multiply and can move throughout the body, often causing damage to tissues and organs.
* Symptoms: Infections can cause a variety of symptoms, depending on the type of organism and the location of the infection. Common symptoms include fever, pain, redness, swelling, and pus.
It's important to note that not all organisms are harmful. Our bodies are actually full of beneficial bacteria that help us stay healthy. It's only when harmful organisms invade and multiply that an infection develops.
