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Clinical Analysis of Sputum Gram Stains and Cultures to Improve the Quality of Sputum Culturesopen accessClinical Analysis of Sputum Gram Stains and Cultures to Improve the Quality of Sputum Cultures

Other Titles
Clinical Analysis of Sputum Gram Stains and Cultures to Improve the Quality of Sputum Cultures
Authors
Dong-Hyun Lee김선주
Issue Date
2020
Publisher
대한임상검사정도관리협회
Keywords
Pneumonia; Culture; Streptococcus pneumoniae; Quality im-prove­ment
Citation
Laboratory Medicine and Quality Assurance, v.42, no.1, pp.33 - 39
Indexed
KCI
OTHER
Journal Title
Laboratory Medicine and Quality Assurance
Volume
42
Number
1
Start Page
33
End Page
39
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/7957
DOI
10.15263/jlmqa.2020.42.1.33
ISSN
2384-2458
Abstract
Background: Sputum Gram stains and cultures are standard tests for the diagnosis of lower respiratory tract infections. Analysis reports of the sputum quality are scarce in relation to cultures as well as clinical diagnosis.Methods: A total of 1,523 sputum specimens, requested for culture, were evaluated for their quality using the modified Murray–Washington (MW) grouping system in association with the culture results. The clinical diagnosis was investigated for the culture positive cases.Results: There was a significant difference in bacterial growth (odds ratio, 2.01; P=0.0164) and diagnosis of pneumonia (odds ratio, 4.18; P=0.002) between the acceptable groups (groups 4–5) and the unacceptable groups (groups 1–3). However, one-quarter did not belong to the current MW group. More than half of the sputum cultures were in group 6, with the lowest positive rate (18.0%). Overall, 10% of the sputum cultures were related to a clinical diagnosis of pneumonia.Conclusions: The MW grouping system should be revised, because one-quarter did not belong to the current group. Further evaluation of group 6 will be needed. Improvement of sputum cultures is required to enhance the diagnosis of pneumonia.
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