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Table 2 ESBL-screen positive strain percentages of HA and CA derived from IAIs (n/n, %)

From: Update of incidence and antimicrobial susceptibility trends of Escherichia coli and Klebsiella pneumoniae isolates from Chinese intra-abdominal infection patients

Organism    2012 N (%) 2013 N (%) 2014 N (%) Total N (%) P-value
ESBL+ strains in IAIs Total 767/1917 (40.0) 626/1665 (37.6)a 507/1578 (32.1)a 1900/5160 (36.8)a 0.0038
CA 166/465 (35.7) 121/375 (32.3) 204/598 (34.1) 491/1438 (34.1) 0.7651
HA 601/1452 (41.4) 503/1277 (39.4) 295/959 (30.8) 1399/3688 (37.9) 0.0011
E. coli ESBL+ Of all E. coli Total 599/887 (67.5) 469/772 (60.8)a 403/684 (58.9)a 1471/2343 (62.8)a 0.1978
CA 138/234 (59.0) 99/192 (51.6) 162/269 (60.2) 399/695 (57.4) 0.5920
HA 461/653 (70.6) 368/575(64.0) 236/406 (58.1) 1065/1634 (65.2) 0.1528
Of all ESBL+ IAI isolates 599/767 (78.1) 469/626 (74.9) 403/507 (79.5) 1471/1900 (77.4) 0.7905
K. pneumoniae ESBL+ Of all K. pneumoniae Total 136/337 (40.4) 145/381 (38.1) 85/319 (26.6)a 366/1037 (35.3)a 0.0215
CA 27/87 (31.0) 21/85 (24.7) 33/112 (29.5) 81/284 (28.5) 0.7703
HA 109/250 (43.6) 124/295 (42.0) 49/201 (24.4) 282/746 (37.8) 0.0060
Of all ESBL+ IAI isolates 136/767 (17.7) 145/626 (23.2) 85/507 (16.8) 366/1900 (19.3) 0.0448
P. mirabilis ESBL+ Of all P. mirabilis Total 24/48 (50.0) 8/32 (25.0) 12/29 (41.4) 44/109 (40.4) 0.3265
CA 0/11 (0.0) 1/10 (10.0) 3/9 (33.3) 4/30 (13.3) 0.1680
HA 24/37 (64.9) 7/22 (31.8) 9/20 (45.0) 40/79 (50.6) 0.3411
Of all ESBL+ IAI isolates 24/767 (3.1) 8/626 (1.3) 12/507 (2.4) 44/1900 (2.3) 0.1715
K. oxytoca ESBL+ Of all K. oxytoca Total 8/21 (38.1) 4/18 (22.2) 7/31 (22.6) 19/70 (27.1)a 0.6073
CA 1/3 (33.3) 0/5 (0) 6/19 (31.6) 7/27 (25.9) 0.4672
HA 7/18 (38.9) 4/12 (33.3) 1/12 (8.3) 12/42 (28.6) 0.3426
Of all ESBL+ IAI isolates 8/767 (1.0) 4/626 (0.6) 7/507 (1.4) 19/1900 (1.0) 0.4608
  1. Note: Escherichia coli (E. coli), Klebsiella pneumoniae (K. pneumoniae), Hospital Acquired (HA), Community Acquired (CA)
  2. aindicates that few strains were not categorized into HA and CA IAIs