What is infection? Everything About Infections, you should know.

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Fast facts on Infection | Symptoms | Prevention

An infection happens when a foreign organism enters a person’s body & causes harm.

The organism uses that person’s body to sustain itself, reproduce, & colonize. These infectious organisms are known as pathogens. Examples of pathogens include bacteria, viruses, fungi, & prions. Pathogens can multiply & adapt quickly.

Some infections are mild & barely noticeable, but others are severe & life-threatening, & some are resistant to treatment. Infection easily can be transmitted in a variety of ways. These include skin contact, bodily fluids, contact with feces, airborne particles, & touching an object that an infected person has also touched. How an infection spreads & its effect on the human body depend on the type of agent.

The immune system is very effective barrier against the infectious agents, but colonies of pathogens may grow too large for the immune system to fight. At this stage, infections become harmful.

Fast facts on infection

  • Infection is the effect of a foreign organism in human body.
  • Types of infection include bacterial, fungal, viral, protozoan, parasitic, & prion disease.
  • They are classified by the different type of organism causing the infection.
  • Infections can range from the mild inflammation in one person to an epidemic.


As well as the site of the infection, the symptoms of an infection depend on the organism responsible. Viruses target specific cells, such as those in the upper or genitals respiratory tract. The rabies virus, for example, targets the nervous system (Fastly). Some viruses target skin cells, causing warts. Others target a wider range of cells in body, leading to various symptoms. A flu virus can cause a runny nose, muscle aches, & an upset stomach.

A person with a bacterial infection will often experience redness & heat, swelling, fever, pain at the site of infection, & swollen lymph glands. A bacterial infection is less likely to affect a wide area of human body than a viral one. Common symptoms of prion diseases include brain damage, memory loss, & cognitive difficulties.


There is no single way to prevent the all infectious diseases, but the following tips can reduce the risk of transmission:

  • Wash your hands often, especially before & after preparing food & after using the bathroom.
  • Clean surface areas & avoid leaving room-temperature food exposed when cooking.
  • Receive any recommended vaccinations, & keep them up to date.
  • Only take antibiotics when prescribed, & be sure to complete any recommended course even if symptoms improve earlier than anticipated.
  • Disinfect rooms where there may be high concentrations of bacteria, such as the kitchen & bathroom.
  • Practice safe sex by receiving the regular STD checks, using condoms, or abstaining altogether.
  • Avoid sharing personal items such a toothbrush, combs, razorblades, drinking glasses, & kitchen utensils.
  • Follow the advice of your doctor about traveling or working when you are ill, as you could infect others.

A healthy, active lifestyle can help keep the immune system strong & able to defend the body against different kinds of infection.

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