Research Article

Prevalence and Genetic Characterization of Carbapenem- and Polymyxin-Resistant Acinetobacter baumannii Isolated from a Tertiary Hospital in Terengganu, Malaysia

Table 1

Primers used in this study.

Genes to be amplifiedPrimer sequences (5′-3′)PCR conditionsExpected product size (bp)References

16S rDNA27F: AGAGTTTGATCMTGGCTCAG
152R: AGGAGGTGWTCCARCC
Initiate—95°C, 3 min; 34 cycles of 95°C, 50 s; 60°C, 50 s; 72°C, 1 min; and final extension at 72°C, 90 s. 1500[18]
bla OXA-23bla_oxa-23F: GATCGGATTGGAGAACCAGA
bla_oxa-23R: ATTTCTGACCGCATTTCCAT
Initiate—95°C, 5 min; 30 cycles of 94°C, 25 s; 2°C, 40 s; 72°C, 50 s and final extension at 72°C, 6 min. 501[26]
bla OXA-51bla_oxa-51F: TAATGCTTTGATCGGCCTTG
bla_oxa-51R: TGGATTGCACTTCATCTTGG
Initiate—95°C, 3 min; 34 cycles of 95°C, 35 s; 57°C, 35 s; 72°C, 45 s; and final extension at 72°C, 90 s. 353[26]
bla OXA-24bla_oxa-24F: GGTTAGTTGGCCCCCTTAAA
bla_oxa-24R: AGTTGAGCGAAAAGGGGATT
Initiate—95°C, 5 min; 30 cycles of 94°C, 25 s; 52°C, 40 s; 72°C, 50 s; and final extension at 72°C, 6 min. 246[26]
bla OXA-58bla_oxa-58F: AAGTATTGGGGCTTGTGCTG
bla_oxa-58R: CCCCTCTGCGCTCTACATAC
Initiate—95°C, 3 min; 30 cycles of 94°C, 1 min; 55°C, 1 min; 72°C; 1 min; and final extension at 72°C, 5 min. 599[26]
bla IMPblaIMP-F: CTACCGCAGCAGAGTCTTTG
blaIMP-R: AACCAGTTTTGCCTTACCAT
Initiate—95°C, 5 min; 34 cycles of 94°C, 25 s; 58°C, 40 s; 72°C, 50 s; and final extension at 72°C, 6 min. 692[2]
bla VIMblaVIM-F: GTTTGGTCGCATATCGCAAC
blaVIM-R: CTACTCAACGACTGAGCCATTTGT
Initiate—95°C, 5 min; 34 cycles of 94°C, 1 min, 58°C, 40 s; 72°C, 50 s; and final extension at 72°C, 6 min. 643[2]
pmrC pmrC_F: ATGTTTAATCTCATTATAGCCATTTG
pmrC_R: TTAGTTTACATGGGCACAAGAGTG
Initiate—95°C, 3 min; 35 cycles of 95°C, 35 s, 56°C, 35 s; 72°C, 45 s; and final extension at 72°C, 90. 1602This study
pmrA pmrA_F: ATGACAAAAATCTTGATGATTGAA
pmrA_R: TTATGATTGCCCCAAACGGTA
Initiate—95°C, 3 min; 35 cycles of 95°C, 35 s; 56°C, 35 s; 72°C, 45 s; and final extension at 72°C, 90 s. 675This study
pmrB pmrB_F: GACTGATTTGGGGCACCTC
pmrB_R: TGTTTCATGTAAATGTAAAACTTTAGG
Initiate—95°C, 3 min; 35 cycles of 95°C, 35 s; 56°C, 35 s; 72°C, 45 s; and final extension at 72°C, 90 s. 1304This study
lpxA lpxA_F: TGAAGCATTAGCTCAAGTTT
lpxA_R: GTCAGCAAATCAATACAAGA
Initiate—95°C, 3 min; 35 cycles of 95°C, 35 s; 56°C, 35 s; 72°C, 45 s; and final extension at 72°C, 90 s. 1179[30]
lpxC lpxC_F: TGAAGATGACGTTCCTGCAA
lpxC_R: TGGTGAAAATCAGGCAATGA
Initiate—95°C, 3 min; 35 cycles of 95°C, 35 s; 55°C, 35 s; 72°C, 45 s; and final extension at 72°C, 90 s. 1164[30]
lpxD lpxD_F: CAAAGTATGAATACAACTTTTGAG
lpxD_R: GTCAATGGCACATCTGCTAAT
Initiate—95°C, 3 min, 35 cycles of 95°C, 35 s; 55°C, 35 s; 72°C for 45 s; and final extension at 72°C, 90 s.1502[30]
lpsB lpsB_F: GCCCGAATTCGCTTCGTATCGCACCAACTC
lpsB_R: CCCGGATATCTCAATTCAATACACTTTGATATAGCTC
Initiate—95°C, 3 min; 35 cycles of 95°C, 35 s, 58°C, 35 s, 72°C, 45 s and final extension at 72°C, 90 s.1400[14]