Please Doctors in the house we have a case that we need help

Please Doctors in the house we have a case that we need help. A father is ill here for the past two weeks,the temperature has remain at 40ºc but no sickness has been discovered yet. Please any suggestions on any test to carry out

Fbc and differentials and see if no infection

malaria n typhoid should b carry out

Consult ur doctor, and take to lab.for a comprehensive test.