Hi, My son (30 yrs old), is suffering from low grade fever for the last 10 days. In the morning his temperature is 97.8 - 98.2 and at (9 am - 11 am) it is 98.6. After that any time between 11 am to 4 PM it rises to 99.2 and at night its is again 98.4 - 98.8. He has lower backache, leg & thigh pain, fatigue and sometime heaviness on the head. He has taken Cepodem for 5 days & Cepodem AZ for the last 5 days. But the fever pattern is the same. Kindly explain the reason and treatment and if any other test is required. He had done Widal test, but it is negative (1/40) only. We had done some other test like - TLC, ESR, Liver, Chest - Xray & Ultra sound (Whole Abdomen). All reports are normal. Please help we are very much worried now.