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   What are infectious diseases?

   • Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.

   Infectious diseases - Symptoms & causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/infectious-diseases/symptoms-causes/syc-20351173

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   Are infectious disease problems related to other medical conditions?

   • Many infectious disease problems are often related to other medical conditions. Our infectious disease specialists work closely with doctors in many specialty areas to make sure you get exactly the care you need.

   Infectious Diseases - Overview - Mayo Clinic

   www.mayoclinic.org/departments-centers/infectious-diseases/sections/overview/ovc-20456906

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   What causes infectious diseases?

   • Infectious diseases are illnesses caused by harmful organisms (pathogens) that get into your body from the outside. Pathogens that cause infectious diseases are viruses, bacteria, fungi, parasites and, rarely, prions. You can get infectious diseases from other people, bug bites and contaminated food, water or soil.

   Infectious Disease: Types, Causes & Treatments - Cleveland Clinic

   my.clevelandclinic.org/health/diseases/17724-infectious-diseases

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2. www.mayoclinic.org › diseases-conditionsInfectious diseases - Symptoms & causes - Mayo Clinic

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   Feb 18, 2022 · Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.

3. my.clevelandclinic.org › health › diseasesInfectious Disease: Types, Causes & Treatments - Cleveland Clinic

   my.clevelandclinic.org › health › diseases

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   Jun 6, 2022 · Infectious diseases are illnesses caused by harmful organisms (pathogens) that get into your body from the outside. Pathogens that cause infectious diseases are viruses, bacteria, fungi, parasites and, rarely, prions. You can get infectious diseases from other people, bug bites and contaminated food, water or soil. Advertisement.

4. www.britannica.com › science › infectious-diseaseInfectious disease | Definition, Types, & Causes | Britannica

   www.britannica.com › science › infectious-disease

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   May 7, 2024 · Infectious disease, process caused by an agent, often a microorganism, that impairs a person’s health. Infectious diseases typically are caused by bacteria, viruses, fungi, or parasites. The immune system generally reacts quickly against these agents, though drugs may be used to help fight off infection.

5. www.mayoclinichealthsystem.org › topics › infectiousInfectious Diseases Information - Mayo Clinic Health System

   www.mayoclinichealthsystem.org › topics › infectious

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   Apr 4, 2024 · Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful, but some organisms under certain conditions may cause disease.

6. www.ncbi.nlm.nih.gov › pmc › articlesPrinciples of Infectious Diseases: Transmission, Diagnosis ...

   www.ncbi.nlm.nih.gov › pmc › articles

   Oct 24, 2016 · An infectious disease can be defined as an illness due to a pathogen or its toxic product, which arises through transmission from an infected person, an infected animal, or a contaminated inanimate object to a susceptible host.