Results 201 to 210 of about 564,270 (247)

BIOLOGICALLY FALSE-POSITIVE SEROLOGIC REACTIONS

Journal of the American Medical Association, 1957
For many years physicians have been confronted with the problem of how to evaluate or interpret serologic reports obtained from the laboratory in determining the presence or absence of a syphilitic infection. Most physicians have encountered nonsyphilitic patients with unexplained positive serologic reactions.
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False-Positive Reactions for Porphobilinogen

JAMA, 1966
FOR MANY YEARS a positive test for porphobilinogen in urine as described by Watson and Schwartz in 1941 1 was accepted as diagnostic of acute intermittent porphyria. This concept was strengthened by 1,000 routine urinalyses by Hammond and Welker 2 in which no false-positive reactions were found.
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STUDIES ON SIGNIFICANCE OF BIOLOGIC FALSE-POSITIVE REACTION

Journal of the American Medical Association, 1957
• The Treponema pallidum immobilization test, a specific means of diagnosing the biologic false-positive reactor, will separate syphilitic from nonsyphilitic patients, within minor limitations. However, the diagnosis of biologic false-positive reactor raises significant questions concerning the patient.
J L, MILLER, M, BRODEY, J H, HILL
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False Positive Reactions in PCR

1991
The polymerase chain reaction (PCR) is a recently developed powerful method with many applications in molecular biology and medical diagnostics. The exquisite sensitivity of PCR is its power, but also its weakness. Even the smallest amount of contaminating DNA can be amplified, resulting in misleading or ambiguous results.
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FALSE POSITIVE SEROLOGIC REACTIONS FOR SYPHILIS

Journal of the American Medical Association, 1941
In the past few years there has been a renewal of interest in false positive serologic reactions. Partly because of the increased number of tests performed as a routine on apparently nonsyphilitic persons, there is a better realization of the number of causes of false positive reactions.
FRANCIS W. LYNCH, RUTH E. BOYNTON, ANNE C. KIMBALL   +2 more
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Phenolphthalein False‐Positive Reactions from Legume Root Nodules

Journal of Forensic Sciences, 2013
AbstractPresumptive tests for blood play a critical role in the examination of physical evidence and in the determination of subsequent analysis. The catalytic power of hemoglobin allows colorimetric reactions employing phenolphthalein (Kastle‐Meyer test) to indicate “whether” blood is present.
Daniel, Petersen, Frank, Kovacs
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Biologic False-Positive Reaction for Syphilis

New England Journal of Medicine, 1963
ONCE upon a time the physician was hard put to distinguish between the true-positive blood test for syphilis and the biologic false-positive reaction. Only time and exhaustive clinical and epidemiologic studies made a disposition of infection or no infection possible.
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FALSE POSITIVE REACTIONS TO THE SCHICK TEST

Journal of the American Medical Association, 1950
It has been known almost since active diphtheria immunization was begun that systemic reactions to diphtheria inoculations were more common among adults than among children. Since 1928 the Moloney test1has made it possible to detect many of these potential reactors.
P, COHEN, H, SCHNECK, E, DUBOW
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False Positive PPD Reactions

Infection Control, 1985
I, Gurevich, S M, Landry, E H, Hunt, J, Richardson, B, Janelli, B A, Cunha   +5 more
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Biological False-Positive Reactions in Mononucleosis

JAMA, 1963
To the Editor: —In the paper entitled "False-Positive Serology in Mononucleosis," which appeared in the Sept 7 issue ofThe Journal( 185 :783), Col Robert J. Hoagland, MC, USA, is to be commended on his personal accumulation of 300 consecutive cases in view of the critical diagnostic criteria laid down.
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