Journals of Gerontology Series A: Biological Sciences and Medical Sciences Large Type Edition
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The Journals of Gerontology Series A: Biological Sciences and Medical Sciences 60:1324-1327 (2005)
© 2005 The Gerontological Society of America

Acute Phase Response Detection and Quantitation at the Point of Care in Older Adults With Acute Bacterial Infections

Ori Rogowski1, Itzhak Shapira1, Shlomo Berliner1,, Jack Serov2, Pinhas Halpern2, David Zeltser1, Bernard Rudensky3 and Tzvi Dwolatzky4

Departments of 1 Medicine "D" and 2 Emergency Medicine, Tel Aviv Sourasky Medical Center (Affiliated with Sackler Faculty of Medicine, Tel Aviv University), Tel Aviv, Israel.
3 Clinical Laboratory and4 Department of Internal Medicine and Geriatrics, Shaare Zedek Medical Center, Jerusalem, Israel (Affiliated with Ben Gurion University of the Negev, Beer-Sheva, Israel).

Address correspondence to Professor Shlomo Berliner, MD, PhD, Director, Department of Medicine "D", Tel Aviv Sourasky Medical Center, 6 Weizman Street, Tel Aviv 64239 Israel. E-mail: shapiraiz{at}tasmc.health.gov.il

Background. We investigated the reliability of a slide test in determining the presence of acute bacterial infections in a group of older adults to determine the usefulness of this test at the point of care.

Methods. The study group included older adults with an acute bacterial infection and matched controls. We examined the white blood cell count (WBCC), the erythrocyte sedimentation, fibrinogen concentration, and high sensitivity C-reactive protein (hs-CRP), in addition to the slide test that reveals the number of leukocytes and degree of erythrocyte aggregation.

Results. There were 144 patients and 144 controls at a respective mean ± standard deviation age of 71.3 ± 20.7 and 70.6 ± 20.2 years. A highly significant difference was noted between patients and controls in all laboratory markers, both conventional and those obtained by the slide test. By using hs-CRP, we correctly predicted the individual group as control or bacterial infection. When analyzed by means of a receiver-operated characteristic (ROC) curve, hs-CRP was again most reliable, with the slide leukocyte test being superior to the WBCC.

Conclusion. The slide leukocyte count provided a similar diagnostic yield to that of the WBCC. The availability of this slide test at the point of care will provide the clinician with a useful biomarker when faced with clinical decisions in the care of older adults.







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