Evaluation of NitroSpeed-Carba NP test for rapid identification among different classes of carbapenemases in Enterobacterales and Pseudomonas aeruginosa

International Journal of Infectious Diseases

Tieli Zhou¹  Lingbo Wang²  Wenli Liao²  Shixing Liu²  Jianzhong Ye²  Yao Sun²  Yishuai Lin³  Ying Zhang³  Huaiyu Jia³ 

[1] Corresponding authors at: Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.;Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China;Department of Medical Lab Science, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang Province, China;

关键词: NitroSpeed-Carba NP test;    Carbapenem-resistant;    Enterobacterales;    Pseudomonas aeruginosa;    Rapid identification;   

DOI  :  

来源: DOAJ

【 摘 要 】

Objectives: This study aimed to evaluate the performance of the NitroSpeed-Carba NP test for detecting carbapenemases in the clinical strains of Enterobacterales and Pseudomonas aeruginosa (P. aeruginosa), and analyze its advantages and limitations. Methods: The antimicrobial susceptibility tests were performed according to the agar dilution method. Using the modified carbapenemase inactivation method (mCIM), polymerase chain reaction (PCR), and sequencing, the production of carbapenemase and the prevalence of genes were studied. The NitroSpeed-Carba NP test was performed to detect different types of carbapenemases in Enterobacterales and P. aeruginosa. The results of PCR and sequencing were used as the gold standard. Results: Among 144 carbapenemase-producing and 54 carbapenemase-negative strains of Enterobacterales and P. aeruginosa, the NitroSpeed-Carba NP test correctly detected 143 of 144 carbapenemase producers and 51 of 54 non-carbapenemase producers. Moreover, the sensitivity and specificity of all tested isolates were 99.31% and 94.44%, respectively (99.28% and 92.86% for Enterobacterales; 100% and 100% for P. aeruginosa). The sensitivity was 100% for class A (56 of 56), 100% for class B (60 of 60), and 100% for class D (27 of 27). Conclusions: The results suggest that NitroSpeed-Carba NP test is a simple and valuable assay that could be used as a rapid and stable detection method to identify the carbapenemases in Enterobacterales and P. aeruginosa strains.

【 授权许可】

Unknown