Infectious diseases - Symptoms & causes - Mayo Clinic
Apr 8, 2025 · Infectious diseases are illnesses that happen when tiny living beings get inside the body and multiply. Bacteria, viruses, fungi and parasites are examples of organisms that can …
Bacterial vs. viral infections: How do they differ? - Mayo Clinic
Nov 25, 2025 · Treating and preventing bacterial and viral infections In some cases, it can be hard to figure out if a bacterial infection or a viral infection is causing your symptoms. Both …
Viral hemorrhagic fevers - Symptoms and causes - Mayo Clinic
Nov 12, 2024 · These diseases most often happen in tropical areas, such as Central Africa. In the United States, most people who get them have traveled to one of those areas. There are …
Viral gastroenteritis (stomach flu) - Symptoms & causes - Mayo …
Apr 30, 2025 · Viral gastroenteritis is an intestinal infection that includes signs and symptoms such as watery diarrhea, stomach cramps, nausea or vomiting, and sometimes fever. The …
Neuro-infectious Diseases - Overview - Mayo Clinic
Nov 8, 2025 · Neuro-infectious Diseases Overview Several infections can affect the nervous system. Infections caused by bacteria or viruses are usually treated by doctors trained in …
Infectious diseases - Diagnosis & treatment - Mayo Clinic
Apr 8, 2025 · For infectious diseases, some basic questions to ask include: What's the most likely cause of my symptoms? Are there other possible causes? What kinds of tests do I need? Is …
Germs: Protect against bacteria, viruses and infections
Mar 5, 2024 · Viruses are responsible for causing many diseases, including: Common cold. Influenza. Measles. Chickenpox and shingles. Coronavirus disease 2019, also called COVID …
Viral hemorrhagic fevers - Diagnosis and treatment - Mayo Clinic
Nov 12, 2024 · Diagnosing viral hemorrhagic fevers in the first few days of illness can be hard. Early symptoms, such as high fever, muscle aches, headaches and extreme tiredness, are …
Infectious Diseases - Overview - Mayo Clinic
Jun 19, 2024 · Our infectious diseases experts help people with bacterial, fungal, viral and parasitic infections. That includes bloodstream infections and complex or rare conditions …
Coronavirus disease 2019 (COVID-19) - Symptoms and causes
Oct 21, 2025 · Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.