Children's Hospital Colorado

Infectious Diseases

What is an infectious disease?

Infectious diseases can range from common illnesses such as the cold, to serious illnesses such as meningitis or AIDS. According to the Centers for Disease Control and Prevention (CDC), an infectious disease is caused by one or more of the following: 

  • Viruses
  • Bacteria  
  • Parasites 
  • Fungi  

What causes infectious diseases?

Depending on the disease-causing organism, an infection can spread in some or all of the following ways: 

  • Airborne transmission: transmission of an infection through inhaling airborne droplets of the disease, which may exist in the air as a result of a cough or sneeze from an infected person
  • Blood-borne transmission: transmission of an infection through contact with infected blood, such as when sharing hypodermic needles
  • Direct skin contact: transmission of an infection through contact with the skin of an infected person
  • Insect-borne transmission: transmission of an infection through insects such as mosquitoes that draw blood from an infected person and then bite a healthy person
  • Food-borne transmission: transmission of an infection through consuming contaminated food 
  • Water-borne transmission: transmission of an infection through contact with contaminated water
  • Sexual transmission: transmission of an infection through sexual contact, including intercourse

What you need to know about coronavirus

To help inform you about the latest coronavirus (COVID-19) updates, experts from Children's Colorado have gathered information from local and national health authorities.

See our resources and updates

Get to know our pediatric experts.

Eric Simoes, MD

Eric Simoes, MD

Infectious Disease - Pediatric

Patient ratings and reviews are not available Why?

Myron Levin, MD

Myron Levin, MD

Internal Medicine

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Elizabeth McFarland, MD

Elizabeth McFarland, MD

Infectious Disease - Pediatric, Pediatrics

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Samantha Economos, PNP

Samantha Economos, PNP

Certified Pediatric Nurse Practitioner

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