Parasitic disease caused by infecting humans with disease. which is a serious health hazard It can be infected all year round. How long is the incubation period for parasitic disease? Typically about 40 days, symptoms include fever, loss of appetite, nausea, vomiting, weight loss, fatigue, etc. Fever caused by ineffective antibiotic use If the patient has a continuous fever and has a history of exposure to infected water Therefore, it must be checked for lesions.