Table 1.

Characteristics of all reported mcr-8.1carrying isolates. COL: colistin; MIC: minimal inhibitory concentration; CC: clonal complex

#	Isolate	Source	City, Country	COL MIC (mg/L)	Antibiotic Resistance Genes	ST	CC	Reference
1	K. pneumoniae k9	Urine (Human)	Beirut, Lebanon	10	mcr-8.1, blaDHA-1, blaSHV-12, blaSHV-13, blaSHV-31, blaSHV-86, blaSHV-129, blaSHV-155, blaSHV-172, aac(6′)-Ib-cr, aadA1, aadA16, aadA2b, aph(3′)-Ia, aac(6′)-Ib-cr, oqxA, oqxB, qnrB2, qnrB4, qnrB52, sul1, sul3, fosA, mph(A), mph(E), msr(E), tetD, dfrA27, cmlA1, floR, arr-3	15	23	This study
2	K. pneumoniae KP91	Swine feces (Animal)	Shandong, China	16	mcr-8.1, blaCTX-M-14, blaSHV-1, strA, strB, armA, aph(4)-Ia, mph(E), msr(E), oqxA,qnrB4, sul1, sul2, sul3, tet(A), tet(B), tet(34), dfrA12	42		[4]
3	K. pneumoniae KP95	Oral cavity pus (Human)	Sétif, Algeria	8	mcr-8.1, blaOXA-48, blaCTX-M-15, blaSHV-94,blaOXA-1, blaTEM-1B, aph(3′)-la, aac(6′)-lb-cr, aph(3″)-lb, aph(6)-ld, oqxB,oqxA, fosA, catB3, sul2, dfrA14	336		[6]
4	R. ornithinolytica QDRO2	Chicken cloaca (Animal)	Shandong, China	8	mcr-8.1, blaTEM-1B, blaOXA-1, blaSHV-73, aac(3)-IVa, aph(4)-Ia, aadA2, fosA, mph(A), mph(E), cat, floR, cml, qnrS4, oqxAB, nrB52, sul1, sul2, sul3, tet(A), tet(34), tet(O), tet(B)			[26]