The ASO/ASLO (Anti Streptolysin) latex test helps to detect if a person has recently been infected with streptococcal infection. It also helps to diagnose complications that result from streptococcus infections like rheumatic fever, or kidney disease. The ASO/ASLO (Anti Streptolysin) latex test is done: • In case of signs and symptoms of rheumatic fever • In case of signs and symptoms of edema • In case of signs and symptoms of glomerulonephritis • In case one has recently been infected with group A streptococcal infection that was not diagnosed and treated properly