36 yo male with fevers, sore throat with white plaques, lymph nodes in axilla + groin. Diffuse myalgias and arthralgias. CT abdomen shows retroperitoneal adenopathy. ESR 98. WBC 5,000 (70% PMNs). HIV screen negative. Sodium 125. Tot bili 8.8, Albumin 2.9.
HIT hanks for posting your query.  It could be due to viral infections likes Infectious Mononucleosis or due to fungal infection or due to chronic bacterial infections like Tuberculosis.  I advise you to get certain tests like Throat swab culture sensitivity (Aerobic and Fungal) , Monte aux test, blood culture sensitivity, IGM Rubella Antibodies, IGM Leptospira Antibodies and Mono test.  Also let me know since how long you are having these symptoms.  I advise you to be empirically started on Doxycycline antibiotic till you get the reports. Ask your doctor for prescription. Kindly revert with reports. Regards/