What Are Infectious Diseases?

Infectious diseases are illnesses caused by pathogenic microorganisms that spread directly or indirectly from one person to another, or from animal to person. 

What Are The Symptoms of An Infectious Disease?

Each infectious disease has its own symptoms. However, there are some general signs that point to the possibility of an infectious disease, such as:

• Fever
• Fatigue
• Diarrhea
• Muscle aches
• Coughing

What Causes Infectious Disease?

Infectious diseases come from four sources:

• Bacteria - Causes UTI (urinary tract infections), strep throat, etc.
• Viruses - Causes a wide range of illnesses, including the common cold and AIDS.
• Fungi - Causes many common skin diseases, including athlete’s foot.
• Parasites - Causes malaria and toxoplasmosis.

Who Is At Risk For Contracting An Infectious Disease?

Technically, everyone is susceptible to an infectious disease. However, those with compromised immune systems are more likely to get sick. This can occur when:

• You have HIV, AIDS or certain types of cancer
• You take medication or steroids that act as immune-supressants (e.g. anti-rejection drugs after an organ transplant)

When Should I See A Doctor? 

You should seek medical attention if you experience any of the following:

• Animal bite
• Persistent cough that lasts over a week
• Trouble breathing
• Rash or swelling
• Severe headache with a fever
• Sudden vision problems
• Prolonged fever