Hospital authorities have also launched an investigation into the outbreak. Experts in tropical medicine have been called in to help with the inquiry. Other patients and staff who were on the ward at the time were screened for malaria and the tests proved negative. Blood samples Staff and patients who had been on the ward previously are having blood samples taken as a precaution. As far as we know it has only happened once before in this country.
Malaria is the world's second biggest killer disease.
It is spread by mosquitoes and symptoms include a cycle of high fever and chills. Most cases can be successfully treated. The BBC is not responsible for the content of external internet sites.