Target organ: intestinal, respiratory tract, blood, urinary, systemic

Infectious diseases affecting the intestine are often caused by bacteria, viruses, and parasites, which are typically contracted through contaminated food or water.
Diseases such as Cholera, E. coli infections, and Salmonella are intestinal infections.
Symptoms commonly include diarrhoea, nausea, stomach cramps, and vomiting.

The respiratory tract can be affected by infectious diseases that are commonly spread through droplets when an infected person coughs or sneezes.
These diseases include Influenza, Tuberculosis, and the Common Cold.
They primarily cause coughing, sneezing, and breathlessness, and can occasionally lead to serious conditions like pneumonia.

Bloodstream infections or sepsis occur when bacteria enter the bloodstream, often via a wound, and can lead to life-threatening conditions.
Diseases such as Malaria and HIV/AIDS affect the blood system.
Blood-related infections can cause symptoms ranging from fever and chills, to rapid breathing and heart rate.

The urinary tract can be targeted by infectious diseases, often due to the presence of harmful bacteria in the urethra.
These diseases, such as the Urinary Tract Infection (UTI), typically cause pain during urination, urinary urgency, and potentially lower abdominal pain.

Systemic infections, such as sepsis or influenza, affect the body as a whole, often traveling through the bloodstream to multiple organs.
Unlike the other categories of infectious diseases mentioned, systemic infections don’t target one specific organ but rather a few or all parts of the body.
Systemic infections can cause fever, headaches, fatigue, and in severe cases, can lead to life-threatening conditions like septic shock.