(Description) Figure 13 The NDP test to identify ESBL-producing bacteria. Samples containing ESBL-producing bacteria (E. coli (10.16) CTX-M-15 and K. pneumoniae (09.200) TEM-3) hydrolyse cefotaxime, leading to acidification which is detected as a change from red to orange using a pH indicator (Nordmann et al., 2012). You do not need to study the details of this figure.

Week 7: Reducing antibiotic use

View all sections of the document

This figure shows the findings of an experiment to identify ESBL-producing bacteria using the NDP test. The image shows two columns each containing five wells of a laboratory testing plate. The first column is labelled no antibiotic. The second column is labelled cefotaxime. Five bacterial are arrange in rows from top to bottom; E. coli wild type, E. coli CTX-M-15, K. pneumoniae TEM-3, K. pneumoniae wild type, K. pneumoniae DHA-1. All the wells are red except for the cefotaxime-treated E. coli CTX-M-15 and K. pneumoniae TEM-3 samples which are yellow.

4.3.4 The Nordmann/Dortet/Poirel test