Table 1. Characteristics of the 2016-2017 Yemeni cholera epidemic strain.
Species | Vibrio cholerae |
Serogroup, serotype and biotype | O1, Ogawa, El Tor |
Genomic wave | 3 |
Genetic markers | ctxB7, tcpACIRS101, rtxA°, VSP-IIΔ* |
AMR profile | POLS (1-2 mg/L), COLS (2-8 mg/L), O129R‡, NALR (64 - ≥ 256 mg/L), CIPDS (0.25-0.5 mg/L), FTR |
Horizontally acquired AMR element, acquired AMR gene (AMR phenotype) | ICEVchInd5/ICEVchBan5Δ**, dfrA1 (O129R) |
Mutated chromosomal genes (AMR phenotype) |
gyrA_S83I and parC_S85L
(NALR,
CIPDS) nfsA_R169C and nfsB_Q5Stop (FTR) |
AMR, antimicrobial resistance; POL, polymyxin B; COL, polymyxin E; NAL, nalidixic acid; CIP, ciprofloxacin; FT, nitrofurantoin; MIC range values are indicated in parentheses; R, S, and DS in uppercase indicate resistant, susceptible, and decreased susceptibility, respectively
Deletion encompassing VC_0495-VC_0512 according to GenBank accession no. AE003852
Deletion encompassing ICEVCHIND5_0011- ICEVCHIND5_0021 according to GenBank accession no. GQ463142
cross-resistance to the vibriostatic agent O/129 and trimethoprim.