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.
HIV antibody testing is used to screen for and diagnose HIV infections. Since there is no cure, early treatment of HIV infection and immune system monitoring can greatly improve long-term health and survival. Also, if a person knows his HIV status, it may help change behaviors that can put him and others at risk.ifferent types of antibody tests may be used for HIV screening: 1  All HIV tests used in the U.S. detect HIV-1, and some tests have been developed that can also detect HIV-2. 2  Combination tests have been developed that detect HIV antibody and the HIV antigen called the p24 antigen.