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.
Several bacteria can cause meningitis: 1  Pneumococcus disease results from the bacteria Streptococcus pneumoniae. It causes pneumonia, ear, and sinus infections. Itâs the most common culprit in bacterial meningitis.  Neisseria meningitidis and less often Staphylococcus aureus can also cause meningitis.