How do bacteria invade host cells?

Infectious pinkeye (the kind that can spread to others) can be caused by many of the bacteria and viruses responsible for colds and other infections — including ... Upper respiratory infections are a contagious infection of your upper respiratory tract, caused by bacteria or a virus. Sinusitis is an inflammation of the sinuses. It is often caused by bacterial (germ) infection. Sometimes, viruses and fungi (molds) cause it. Those at greatest risk for bacterial pneumonia include people recovering from surgery, people with chronic respiratory disease or viral infection, children ... Mar 5, 2025 ... Infections are caused by micro-organisms such as bacteria, viruses, fungi, and parasites, otherwise known as germs. Infections are caused by bacteria. Although bacteria are abundant in our gastrointestinal (GI) tract and on our skin, they are usually kept in check by our ... "Tuberculous Infection in People Dying of Causes other than Tuberculosis1." American Review of Tuberculosis, 48(3), pp. 131–173 ... Key facts · Some bacteria can cause infections, but not all bacteria are harmful. · Bacterial infections caused by different types of bacteria can affect many ... Share ... Most urine infections in men are caused by germs (bacteria) which come from your own bowel. They cause no harm in your bowel but can cause infection if ... Dec 11, 2024 ... ... causes infections in or around the mouth (oral herpes or cold sores). It can also cause genital herpes. Most adults are infected with HSV-1.