Research Article
Florfenicol Resistance in Enterobacteriaceae and Whole-Genome Sequence Analysis of Florfenicol-Resistant Leclercia adecarboxylata Strain R25
Table 3
Prevalence and antibiotic resistance of Enterobacteriaceae isolated from animal feces from animal farms in South China.
| Genera | Isolates | Resistancea | Resistance genes | Florfenicolb | Chloramphenicol | floR | cfr | pexA | fexA | fexB | optrA | estDL136 | S | I | R | S | I | R |
| Escherichia | 251 (86.0%) | 87 (34.7%) | 7 (2.8%) | 157 (62.5%) | 84 (33.5%) | 6 (2.4%) | 161 (64.1%) | 164 (65.3%) | 0 | 0 | 0 | 0 | 0 | 0 | Klebsiella | 8 (2.7%) | 2 (25.0%) | 0 | 6 (75.0%) | 0 | 0 | 8 (100.0%) | 6 (75.0%) | 0 | 0 | 0 | 0 | 0 | 0 | Proteus | 9 (3.1%) | 1 (11.1%) | 0 | 8 (88.9%) | 0 | 0 | 9 (100.0%) | 8 (88.9%) | 3 (1.0%) | 0 | 0 | 0 | 0 | 0 | Enterobacter | 10 (3.4%) | 7 (70.0%) | 1 (10.0%) | 2 (20.0%) | 8 (80.0%) | 0 | 2 (20.0%) | 3 (30.0%) | 0 | 0 | 0 | 0 | 0 | 0 | Other generac | 14 (4.8%) | 7 (50.0%) | 0 | 7 (50.0%) | 4 (28.6%) | 0 | 10 (71.4%) | 7 (50.0%) | 0 | 0 | 0 | 0 | 0 | 0 | Total | 292 (100.0%) | 104 (35.6%) | 8 (2.7%) | 180 (61.6%) | 96 (32.9%) | 6 (2.1%) | 190 (65.1%) | 188 (64.4%) | 3 (1.0%) | 0 | 0 | 0 | 0 | 0 |
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Abbreviations: S: sensitive; I: intermediate; R: resistance. aCriteria as published by CLSI 2017. bUsing chloramphenicol breakpoints. cOther genera of Enterobacteriaceae bacteria including 2 Shigella, 1 Serratia, 5 Citrobacter, 1 Yersinia, 1 Leclercia, 3 Pantoea, and 1 Kluyvera.
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