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

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Author(s):	Valencio, Andre ; da Silva, Miriam Aparecida ; Santos, Fernanda Fernandes ; Polatto, Juliana Moutinho ; Machado, Marcelo Marcondes Ferreira ; Piazza, Roxane Maria Fontes ; Gales, Ana Cristina Total Authors: 7
Document type:	Journal article
Source:	MICROORGANISMS; v. 11, n. 4, p. 14-pg., 2023-04-01.
Abstract
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. (AU)

FAPESP's process:	21/01158-3 - Development of an immunochromatographic test for detection of carbapenemases in Enterobacteria
Grantee:	Ana Cristina Gales
Support Opportunities:	Regular Research Grants