Pneumococcal meningitis is a form of meningitis caused by a bacteria called a pneumococcus. This bacteria can cause sinus and ear infections, as well as chest infections, and occasionally meningitis can occur. Pneumococcal meningitis is a serious illness. Its symptoms are the same as in other forms of meningitis, i.e. fever, headache, nausea and vomiting, irritability, and coma. The symptoms of pneumococcal meningitis are very different from those of a chest infection. Although children with chest infections are likely to have a fever (as well as a cough), they do not usually suffer with vomiting or drowsiness.