FIGURE LEGENDS
Figure 1. Microscopic findings in an 8-day-old Brazilian merganser (Mergus octosetaceus ) with colibacillosis. In a: Lungs, note congestion of alveolar capillaries and perivascular edema (Black arrow). In b: Liver, note hepatocellular swelling and intracytoplasmic vacuolation (Black arrow). Hematoxylin and eosin staining.
Figure 2. Resistome of multidrug-resistant CTX-M-8-producingEscherichia coli PMPU strain. Columns show genes encoding resistance to antibiotics, disinfectants, heavy metals and acid or basic environment.
a Mutations in quinolone resistance-determining region (QRDR).
Figure 3. Phylogeny of CTX-M-8-producing Escherichia coli isolate from a Brazilian merganser (Mergus octosetaceus ), in relation to an international E. coli collection. The image shows a minimum spanning tree based on wgMLST of 123 worldwide distributed E. coli strains belonging to ST58, constructed by the MSTree V2 tool from EnteroBase. The figure was generated with iTOL v.5.5 (https://itol.embl.de). Interactive versions of the tree can be found at https://itol.embl.de/tree/20014463144294501588789515. Colored circles represent sources of origin. Each isolate is indicated by the country of origin.