Hello,
One of the rules of travel and tropical medicine is that a fever
in non-native person (not taking
malaria prophylaxis)
in an area with endemic malaria is malaria until proven otherwise.
In general, symptoms of high fever, neck stiffness, and headache are features of meningitis. And, if confusion (or mental status changes) is present, then we get concerned about encephalitis.
That being said, there are many, many causes of fever and body aches (medical name is myalgias).