Development for Clinical Use of a Multiplexed Immunoassay Using Sputum Samples for Streptococcus pneumoniae: a Non-Culture-Based Approach for Serotype-Specific Detection
| Autor: | Jong Hun Kim, Min Ja Kim, Jang Wook Sohn, Sun Jin Kim, Moon H. Nahm, Yoo Jung Jeong, Young Kyung Yoon |
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| Rok vydání: | 2018 |
| Předmět: |
Microbiology (medical)
Serotype endocrine system diseases medicine.drug_class Monoclonal antibody medicine.disease_cause Serogroup Pneumococcal Infections Microbiology law.invention Pneumococcal Vaccines law Risk Factors Multiplex polymerase chain reaction Streptococcus pneumoniae Republic of Korea medicine Humans Multiplex Serotyping Immunoassays Polymerase chain reaction Immunoassay medicine.diagnostic_test business.industry Sputum Reproducibility of Results digestive system diseases respiratory tract diseases medicine.symptom business |
| Zdroj: | Journal of clinical microbiology. 57(10) |
| ISSN: | 1098-660X |
| Popis: | The multiplexed immunoassay (MIA) is an automated, monoclonal antibody-based serotyping assay that uses culture lysates of Streptococcus pneumoniae. This study describes the development and validation of applying MIA directly to sputum samples for the serotype-specific detection of S. pneumoniae. Sputum optimization involved liquefaction and fractionation. The subjects included 173 adult patients from whom both pneumococcal isolates cultured from sputum samples and the corresponding sputum samples were available at the Korea University Hospital from March 2012 to June 2015. Pneumococcal lysates and the sputum fraction were separately evaluated by MIA with a set A reaction to identify 27 serotypes (24 vaccine serotypes and serotypes 6C, 6D, and 11E). MIA results were validated by multiplex PCR (mPCR). Among the 173 patients analyzed, the pneumococcal isolate MIA detected a single set A serotype in 104 patients, and the corresponding sputum MIA showed concordant results with additional multiple serotypes in 21 patients. For the remaining 69 patients whose pneumococcal isolates were not determined to be set A serotypes by the pneumococcal isolate MIA, the corresponding sputum MIA identified additional set A serotypes (single serotypes, n = 17; multiple serotypes, n = 4). Serotypes 3 and 11A/D/F were the most commonly detected serotypes in both the pneumococcal isolate and sputum MIA analyses. However, serotype 8 was the most prevalent serotype detected only by the sputum MIA. The results of mPCR, performed for validation, showed a high concordance with the results of the sputum MIA. In conclusion, MIA using sputum samples enables the accurate, rapid, direct, and serotype-specific detection of S. pneumoniae, which may improve postvaccination serotype surveillance. |
| Databáze: | OpenAIRE |
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