Although it's commonly called stomach flu, gastroenteritis isn't the same as influenza. Real flu (influenza) affects only your respiratory system â your nose, throat and lungs. Gastroenteritis, on the other hand, attacks your intestines, causing signs and symptoms, such as:
Meningitis is a disease caused by the inflammation of the protective membranes covering the brain and spinal cord known as the meninges. The inflammation is usually caused by an infection of the fluid surrounding the brain and spinal cord.eningitis can be caused by viruses, like enteroviruses, arboviruses and herpes simplex viruses. Itâs serious, but less severe than bacterial meningitis, and people with normal immune systems usually get better on their own. There are vaccines to prevent some kinds of viral meningitis.
1 Meningitis is usually caused by one of a number of bacteria. 2  The most common is Streptococcus pneumoniae. 3  Neisseria meningitidis can cause outbreaks in crowded conditions, such as college dormitories or military barracks. 4  Haemophilus influenzae type B (Hib) can also cause meningitis in adults and children. Bacterial meningitis can occur for a number of reasons. 2  Often, it is the result of an infection by bacteria that already live in the nose and mouth. 3  The bacteria enter the blood and become lodged in the brain's outer covering, the meninges.