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WASTING SYNDROME: The HIV wasting syndrome involves involuntary weight loss of 10 percent of baseline body weight plus either chronic diarrhea (two loose stools per day for more than 30 days) or chronic weakness and documented fever (for 30 days or more, intermittent or constant) in the absence of a concurrent illness or condition other than HIV infection that would explain the findings.

WESTERN BLOT: A laboratory test for the presence of specific antibodies, more accurate than the ELISA test. See also Antibodies; ELISA.