Journal List > Ann Clin Microbiol > v.20(4) > 1078581

Lee, Sung, Cho, and Chi: Evaluation of EuDx TM-PN MLC Detection Kit for Detection of Mycoplasma pneumoniae, Chlamydophila pneumoniae, and Legionella pneumophila in Respiratory Specimens

Abstract

Background

Infection by the intracellular bacteria Mycoplasma pneumoniae, Chamydophila pneumoniae, and Legionella pneumophila are common causes of community-acquired pneumonia (CAP). This study describes the evaluation of a new multiplex realtime PCR test, EuDx TM-PN MLC Detection Kit (EUDIPIA), which allows the simultaneous detection of M. pneumoniae, C. pneumoniae, and L. pneumophila in respiratory samples.

Methods

A total of 353 samples were tested using three PCR kits: multiplex PCR (Seeplex PneumoBacter ACE Detection Kit) and two multiplex real-time PCR (EuDx TM-PN MLC Detection Kit and Anyplex TM II RB5 Detection Kit). The results were considered true positives (expanded standard) for M. pneumoniae, C. pneumoniae, and L. pneumophila if they were positive according to any of the three tests.

Results

The sensitivity and specificity of EuDx TM-PN MLC Detection Kit were 93.3–100% and 100%, respectively. The agreement rate and Cohen's kappa coefficient (value) between EuDx TM-PN MLC Detection Kit and Anyplex TM II RB5 Detection Kit for M. pneumoniae, C. pneumoniae, and L. pneumophila were 70-100% and 0.82–1, respectively.

Conclusion

These results demonstrate that the EuDx TM-PN MLC Detection Kit is a sensitive, specific, and useful screening tool for the detection of atypical pathogens in respiratory samples and can be helpful in selecting appropriate antimicrobial therapy for patients with respiratory infection.

References

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Table 1.
Sensitivity and specificity of the tests for Mycoplasma pneumoniae to extended standard
Test Extended standard Sensitivity (%)(95% CI) Specificity (%)(95% CI)
Positive Negative
SeePlex        
Positive 105 0 85.4 100
Negative 18 230 (77.9–91.1) (98.4–100.0)
EuDx        
Positive 120 0 97.6 100
Negative 3 230 (93.0–99.5) (98.4–100.0)
Anyplex        
Positive 118 10 95.9 95.7
Negative 5 220 (90.8–98.7) (92.2–97.9)

Abbreviations: SeePlex, Seeplex PneumoBacter ACE Detection Kit; EuDx, EuDx

TM -PN MLC Detection Kit; Anyplex, Anyplex

TM II RB5 Detection Kit.

Table 2.
Sensitivity and specificity of the tests for Chamydophila pneumoniae to extended standard
Test Extended standard Sensitivity (%)(95% CI) Specificity (%)(95% CI)
Positive Negative
SeePlex        
Positive 20 15 95.2 95.5
Negative 1 317 (76.2–99.9) (92.7–97.5)
EuDx        
Positive 20 0 95.2 100
Negative 1 332 (76.2–99.9) (98.9–100.0)
Anyplex        
Positive 20 0 95.2 100
Negative 1 332 (76.2–99.9) (98.9–100.0)

Abbreviations: SeePlex, Seeplex PneumoBacter ACE Detection Kit; EuDx, EuDx

TM -PN MLC Detection Kit; Anyplex, Anyplex

TM II RB5

Table 3.
Sensitivity and specificity of the tests for Legionella pneumophila to extended standard
Test Extended standard Sensitivity (%)(95% CI) Specificity (%)(95% CI)
Positive Negative
SeePlex        
Positive 13 0 86.7 100
Negative 2 338 (59.5–98.3) (98.9–100.0)
EuDx        
Positive 14 0 93.3 100
Negative 1 338 (68.1–99.8) (98.9–100.0)
Anyplex        
Positive 15 5 100 98.5
Negative 0 333 (78.2–100.0) (96.6–99.5)

Abbreviations: SeePlex, Seeplex PneumoBacter ACE Detection Kit; EuDx, EuDx

TM -PN MLC Detection Kit; Anyplex, Anyplex

TM II RB5 Detection Kit.

Table 4.
Comparison of EuDx TM-PN MLC Detection Kit and Anyplex TM II RB5 Detection Kit for the detection of Mycoplasma pneumoniae, Chamydophila pneumoniae, and Legionella pneumophila
EuDx Anyplex Agreement for positive (%) (95% CI) Agreement for negative (%) (95% CI) kappa (95% CI)
Positive Negative
MP          
Positive 117 3 91.4 98.7 0.91
Negative 11 222 (85.1–95.6) (96.2–99.7) (0.87–0.96)
CP          
Positive 20 0 100 100 1
Negative 0 333 (83.2–100.0) (98.9–100.0) (1–1)
LP          
Positive 14 0 70.0 100 0.82
Negative 6 333 (45.7–88.1) (98.9–100.0) (0.67–0.96)

Abbreviations: EuDx, EuDx

TM -PN MLC Detection Kit; Anyplex, Anyplex

TM II RB5 Detection Kit; kappa, Cohen's kappa coefficient (value); MP, M. pneumoniae; CP, C. pneumoniae; LP, L. pneumophila.

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