
Germs: Protect against bacteria, viruses and infections
Mar 5, 2024 · Many disease-causing bacteria make powerful chemicals called toxins that damage cells and make you ill. Other bacteria can get into and damage tissues. Some infections caused by …
Urinary tract infection (UTI) - Symptoms and causes - Mayo Clinic
When that happens, bacteria may take hold and grow into a full-blown infection in the urinary tract. The most common UTIs affect the bladder and urethra. Infection of the bladder. Bacteria called E. coli …
Helicobacter pylori (H. pylori) infection - Symptoms & causes - Mayo …
Dec 16, 2025 · A Helicobacter pylori infection is a common stomach infection. It's caused by a germ called Helicobacter pylori, a bacteria also known as H. pylori. More than half the people in the world …
Pneumonia - Symptoms and causes - Mayo Clinic
Jun 13, 2020 · Pneumonia is classified according to the types of germs that cause it and where you got the infection. Community-acquired pneumonia Community-acquired pneumonia is the most common …
Meningitis - Symptoms and causes - Mayo Clinic
Oct 17, 2024 · Several strains of bacteria can cause bacterial meningitis. The most common are: Streptococcus pneumoniae. This germ is the most common cause of bacterial meningitis in infants, …
Plague - Symptoms and causes - Mayo Clinic
Apr 20, 2023 · Symptoms There are three types of plague. The symptoms vary for each type. Bubonic plague Bubonic plague causes swelling of lymph nodes. These are small, bean-shaped filters in the …
E. coli - Symptoms and causes - Mayo Clinic
Oct 1, 2022 · Most strains of E. coli bacteria are harmless, but some can cause severe symptoms. Learn about symptoms and treatment of this common foodborne illness.
Bacterial vaginosis - Symptoms and causes - Mayo Clinic
Jun 10, 2023 · Bacterial vaginosis can happen at any age. But it's most common during the reproductive years. The changes in hormones during this time make it easier for certain kinds of bacteria to grow. …
Sepsis - Symptoms & causes - Mayo Clinic
Feb 10, 2023 · Symptoms of septic shock Sepsis may progress to septic shock. Septic shock is a severe drop in blood pressure. Progression to septic shock raises the risk of death. Symptoms of septic …
Staph infections - Symptoms & causes - Mayo Clinic
Dec 16, 2025 · Staph infections are caused by staphylococcus bacteria. These germs may be found on the skin or in the nose of many people and cause no harm. If they do cause harm, staph bacteria …