Renal stone: A stone in the kidney (or lower down in the urinary tract). Also called a kidney stone. Renal stones are a common cause of blood in the urine and pain in the abdomen, flank, or groin. Kidney stones occur in 1 in 20 people at some time in their life. The development of the stones is related to decreased urine volume or increased excretion of stone-forming components such as calcium, oxalate, urate, cystine, xanthine, and phosphate.
In general, antibody tests that use blood can detect HIV slightly sooner after infection than tests done with oral fluid. It can take 3 to 12 weeks (21-84 days) for an HIV-positive personâs body to make enough antibodies for an antibody test to detect HIV infection. This is called the window period.
Tests to tailor treatment. If you receive a diagnosis of HIV/AIDS, several types of tests can help your doctor determine what stage of the disease you have. These tests include: 1  CD4 count. 2  CD4 cells are a type of white blood cell that's specifically targeted and destroyed by HIV. 3  Even if you have no symptoms, HIV infection progresses to AIDS when your CD4 count dips below 200. 4  Viral load.