Article Figures & Data
Tables
- Table 1
Number of isolates of each species recovered within the study period, extended-spectrum cephalosporin resistance, and number of resistant isolates that were further studied
Species No. of isolates No. (%) of ESCa-resistant isolates ESC-resistant isolates recovered within 1 wk No. of isolates No. of ESBL producers/AmpC producers Escherichia coli 1,120 64 (5.7) 16 14/2 Klebsiella pneumoniae 193 87 (45.1) 22 22/0 Proteus mirabilis 115 14 (12.2) 6 5/1 Enterobacter cloacae 37 11 (29.7) 3 1/2 Morganella morganii 29 11 (37.9) Klebsiella oxytoca 20 6 (30) 4 4/0 Citrobacter freundii 18 5 (27.8) Serratia spp. 18 5 (27.8) 3 3/0 Providencia spp. 13 2 (15.4) 1 1/0 Citrobacter spp. 8 – Proteus vulgaris 7 2 (28.6) Enterobacter aerogenes 3 Salmonella sp. 2 Shigella spp. 2 Proteus penneri 1 Total 1,586 207 (13.1) 55 50/5 ↵a ESC, extended-spectrum cephalosporin.
- Table 2
Primers used in this study
Name Sequence (5′→3′) Reference CTX-M-group-1F GTTACAATGTGTGAGAAGCAG 17 CTX-M-group-1R AACGGAATGAGTTTCCCCATT 17 CTX-M-group-2F ACCAGGCTCAATTGTGGA This study CTX-M-group-2R AGATGAGGGTTCGTTGCAA This study CTX-M-group-8F CACGGATTCAATTTTCAGGAG 3 CTX-M-group-8R GAGCGCTCCACATTTTTTAG 3 CTX-M-group-9F GTTACAATGTGTGAGAAGCAG 17 CTX-M-group-9R CAGCCAGAAAGTTATGGAG This study CTX-M-group-25F GGATGATGAGAAAAAGCGTAAGGC This study CTX-M-group-25R GGACTAATAACCGTCGGTGAC This study - Table 3
CTX-M-producing enterobacteria collected during a 1-week studya in 15 hospitals distributed in different regions of Argentina
Species (no. of isolates) ESBL determinant(s) (no. of isolates) Klebsiella pneumoniae (21) blaCTX-M-15 (10) blaCTX-M-2 (9) blaCTX-M-2 + blaCTX-M-15 (1) blaCTX-M-8 (1) Escherichia coli (13) blaCTX-M-15 (7) blaCTX-M-14 (3) blaCTX-M-2 (3) Proteus mirabilis (5) blaCTX-M-2 (4) blaCTX-M-56 (1) Klebsiella oxytoca (4) blaCTX-M-2 (3) blaCTX-M-2 + blaCTX-M-15 (1) Serratia spp. (3) blaCTX-M-2 (3) Providencia spp. (1) blaCTX-M-2 (1) ↵a October 2010.
- Table 4
Genotypic characterization of CTX-M-15-producing E. coli and K. pneumoniae isolates
Species and isolate City Hospitala Phylogenetic group Clone Genetic context of blaCTX-M-15b E. coli CM2 Buenos Aires H6 B2 Ec1 II L4 Buenos Aires H3 B2 Ec2 I M1 Buenos Aires H7 A Ec3 II SM4 Buenos Aires H8 A Ec4 II SM5 Buenos Aires H8 A Ec5 I T1 Chubut H13 B2 Ec2 I T3 Chubut H13 B2 Ec6 I K. pneumoniae B4 Buenos Aires H4 NDc Kp2 I CL1 Buenos Aires H1 ND Kp3 I CL4 Buenos Aires H1 ND Kp1 I CL6 Buenos Aires H1 ND Kp7 II CL9 Buenos Aires H1 ND Kp4 I CM4 Buenos Aires H6 ND Kp1 I CV1 Buenos Aires H7 ND Kp5 II I3 Santa Fe H5 ND Kp1 I I4 Santa Fe H5 ND Kp1 I L5 Buenos Aires H3 ND Kp6 I T8 Chubut H13 ND Kp8 I ↵a H1, Hospital de Clínicas, Universidad de Buenos Aires; H3, Hospital Alemán, Ciudad Autónoma de Buenos Aires (CABA); H4, Hospital Británico, CABA; H5, Hospital Iturraspe, Santa Fe; H6, CEMIC, CABA; H7, Sanatorio Mater Dei, CABA; H8, Hospital Eva Perón, Buenos Aires; H13, Hospital de Trelew, Chubut.
↵b I, international blaCTX-M-15 genetic environment (GenBank accession no. NC013121.1; II, truncated ISEcp1-blaCTX-M-15 genetic environment (GenBank accession no. HQ157353) (11).
↵c ND, not determined.