Capture ELISA for KPC Detection in Gram-Negative Bacilli: Development and Standardisation.

Autor: Valencio A; Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil., da Silva MA; Laboratório de Bacteriologia, Instituto Butantan, São Paulo 05503-900, Brazil., Santos FF; Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil., Polatto JM; Laboratório de Bacteriologia, Instituto Butantan, São Paulo 05503-900, Brazil., Machado MMF; Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil., Piazza RMF; Laboratório de Bacteriologia, Instituto Butantan, São Paulo 05503-900, Brazil., Gales AC; Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil.
Jazyk: angličtina
Zdroj: Microorganisms [Microorganisms] 2023 Apr 18; Vol. 11 (4). Date of Electronic Publication: 2023 Apr 18.
DOI: 10.3390/microorganisms11041052
Abstrakt: The detection of KPC-type carbapenemases is necessary for guiding appropriate antibiotic therapy and the implementation of antimicrobial stewardship and infection control measures. Currently, few tests are capable of differentiating carbapenemase types, restricting the lab reports to their presence or not. The aim of this work was to raise antibodies and develop an ELISA test to detect KPC-2 and its D179 mutants. The ELISA-KPC test was designed using rabbit and mouse polyclonal antibodies. Four different protocols were tested to select the bacterial inoculum with the highest sensitivity and specificity rates. The standardisation procedure was performed using 109 previously characterised clinical isolates, showing 100% of sensitivity and 89% of specificity. The ELISA-KPC detected all isolates producing carbapenemases, including KPC variants displaying the ESBL phenotype such as KPC-33 and -66.
Databáze: MEDLINE
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