Harmful bacteria from the environment, an infected person or animal, a bug bite or something contaminated (like food, water or surfaces) can cause infections. Bacteria that’s not normally …

Bacterial infections happen when harmful bacteria enter your body and increase in number (multiply). They may also occur when bacteria that usually live on your skin or inside your body …

Nov 8, 2023 · Your odds of developing a specific type of bacterial infection vary by age. Infants and young children who aren’t fully vaccinated against preventable bacterial infections are …

Feb 10, 2024 · Bacterial infections occur when harmful bacteria multiply in your body, causing symptoms like fever, headache, chills, coughing, and pain.

Bacterial infections develop when harmful bacteria enter the body and grow, leading to illness. Examples of bacterial infections include strep throat, urinary tract infections (UTIs) and …

Apr 8, 2025 · Causes Infectious diseases can be caused by: Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis. …

Jun 7, 2025 · While many bacteria are harmless, even beneficial, certain types can cause diseases, leading to what we know as bacterial infections. These infections are caused when …

Sep 27, 2024 · But some types of bacteria can cause an infection and make you sick. They are called infectious bacteria. These bacteria can reproduce quickly in your body. Many of them …

Bacterial infections occur when harmful bacteria enter the body, multiply, and cause illness. They can affect different body systems and range from mild to severe.

Sep 19, 2025 · An infection occurs when a microorganism — such as bacteria, fungi, or a virus — enters a person’s body and begins multiplying. Infections can have a variety of effects, ranging …