Bands/Stabs. Early in the response to infection, immature forms of neutrophils will be seen. These are call Stab or Band cells. The presence of these immature cells is called a shift to the left and can be the earliest sign of a WBC response, even before the WBC becomes elevated.
urine culture and sensitivity (C&S), a microscopic study of the urine culture performed to determine the presence of pathogenic bacteria in patients with suspected urinary tract infection.rine culture and sensitivity (C&S), a microscopic study of the urine culture performed to determine the presence of pathogenic bacteria in patients with suspected urinary tract infection.
Sensitivity and specificity. 1  The sensitivity of a test is the percentage of results that will be (correctly) positive when HIV is actually present. Lower rates of sensitivity will produce more false negative results. 2  The specificity of a test is the percentage of results that will be (correctly) negative when HIV is not present.