Development of a North American proficiency testing program for soil and plant analysis

1998 ◽  
Vol 29 (11-14) ◽  
pp. 1685-1690 ◽  
Author(s):  
Ann M. Wolf ◽  
Robert O. Miller
Keyword(s):  
Proficiency Testing ◽  
North American ◽  
Plant Analysis ◽  
Testing Program ◽  
Soil And Plant Analysis

Assessment of soil and plant analysis laboratories in the West Asia‐North Africa Region

1999 ◽  
Vol 30 (5-6) ◽  
pp. 885-894 ◽  
Author(s):  
John Ryan ◽  
Sonia Garabet ◽  
Abdul Rashid ◽  
Mohamed El Gharous
Keyword(s):  
North Africa ◽  
Plant Analysis ◽  
The West ◽  
Soil And Plant Analysis

Results of the Center for Disease Control Proficiency Testing Program for the detection of hepatitis B surface antigen

1976 ◽  
Vol 4 (1) ◽  
pp. 32-39
Author(s):  
R N Taylor ◽  
K M Fulford
Keyword(s):  
Hepatitis B ◽  
Disease Control ◽  
Proficiency Testing ◽  
Surface Antigen ◽  
Hepatitis B Surface Antigen ◽  
Latex Agglutination ◽  
Lower Sensitivity ◽  
Passive Hemagglutination ◽  
Testing Program ◽  
Efficiency And Effectiveness

The changes in the types and numbers of tests used by participants in the Center for Disease Control Proficiency Testing Program for the detection of hepatitis B surface antigen from the beginning of the program in 1971 until October 1975 are analyzed; the implications of these changes are discussed. Changes in the use of agar gel diffusion, rheophoresis, counterelectrophoresis, complement fixation, reverse passive latex agglutination, radioimmunoassay, and reverse passive hemagglutination tests are reviewed. The performance of the participants for 1975 is reported, and factors related to performance (type or combinations of tests used, procedures used to confirm specificity, etc.) are discussed. The increase in the use of third-generation tests in place of tests with lower sensitivity and the decrease in the use of multiple tests undoubtedly represent increased efficiency and effectiveness.

Variability in Testing for Antineutrophil Cytoplasmic Antibodies: A Survey of Participants in the College of American Pathologists Proficiency Testing Program

2016 ◽  
Vol 140 (6) ◽  
pp. 524-528
Author(s):  
William J. Karlon ◽  
Stanley J. Naides ◽  
John T. Crosson ◽  
Mohammad Qasim Ansari
Keyword(s):  
Proficiency Testing ◽  
Antineutrophil Cytoplasmic Antibodies ◽  
Testing Program ◽  
Acceptable Alternative ◽  
Disease States ◽  
Comprehensive Information ◽  
Testing Algorithms ◽  
Testing Practices ◽  
Current Guidelines ◽  
Multiplex Bead

Context.—Variability in testing for antineutrophil cytoplasmic antibodies (ANCAs) contributes to confusion and controversy related to testing for vasculitis and other ANCA-associated diseases. Objectives.—To survey laboratory testing practices regarding ANCA testing and to investigate differences in testing algorithms. Design.—Supplemental questions were sent to the 333 laboratories participating in the College of American Pathologists proficiency testing program for ANCA as part of the Special Immunology S2 Survey. Results.—A total of 315 laboratories submitted responses to the supplemental questions. Only 88 of 315 participants (28%) reported using a combination of indirect immunofluorescence (IFA) and enzyme immunoassay (EIA) techniques as recommended by current guidelines, with a few additional labs using IFA and multiplex bead assay as an acceptable alternative to EIA. Other labs reported using only IFA, EIA, or multiplex bead assays. Conclusions.—A wide variety of testing algorithms are in use for ANCA testing despite evidence to suggest that a combination of IFA and EIA testing provides the most comprehensive information. Laboratories should inform clinicians clearly about testing practices and utility of testing in specific disease states.

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