Earlier, cerebrospinal fluid samples were sent for analysis only in cases where exposure to a waterbody was found. Now, all cases of meningoencephalitis are checked to see if it is caused by any free living amoeba, say Health officials Earlier, cerebrospinal fluid samples were sent for analysis only in cases where exposure to a waterbody was found. Now, all cases of meningoencephalitis are checked to see if it is caused by any free living amoeba, say Health officials Health Health News, Wellbeing Tips, Diseases, Treatment and Nutrition | The Hindu