69 yo wm with daily fever to 102 for 3 weeks. feels fine in am and afternoon becomes fatigued and spikes fever . pos nightsweats. crp 200 and esr 78. neg bld cx . wbc 15 k. . no neuro, gi,cardiac or pulm sx noted. exam is normal. no la, normal cardiac, pulm, abd exams. no rash.
HIT hanks for posting to Chat Doctor.  Fever most of the time is due to infection. Infection could be due to Virus, bacterial, fungus or Parasite. But fever of 102 F lasting for 3 weeks is most likely due to Bacterial infection.  Now which bacterial infection you are having has to be evaluated. I advise you to get the following tests done and revert.  IGM Ty phi Dot, Smear for Malaria Parasite, Urine Culture, IGM Letospira antibodies, Monte aux test. Kindly revert with test reports. Regards.