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Table 1 Occurrence and prevalence of class 1 integron in Gram-negative microorganisms

From: Resistance integrons: class 1, 2 and 3 integrons

Date Bacterial Occurrence of class 1 integron and the array of gene cassettes Sampling References
2006 Shigella EstX-aadA1 (3.85 %, 1/26) Hiroshima prefecture, Japan; 2000–2004 [34]
2002 Salmonella 36.2 % (34/94); aadA2-bla (PSE-1) (61.76 % 21/34); aadA1-aadA2-bla (PSE-1) (38.23 %,13/34) Animals, Japan [33]
2000 V. cholerae 44/176; aadB-aadA2-blaP1-dfrA1-dfrA15 Thailand [39]
2002 Burkholderia 29.4 % (5/17); oxa-aac (6′-1a) Ireland [38]
2004 Campylobacter 62/378 Ireland [37]
2008 Enterobacteriaceae 50/226 Addenbrooke’s Hospital [62]
2005 Escherichia coli 4/32 (12.5 %); sat-1-aadA Meat and meat products, Norwey [42]
2008 E. coli 59.5 % (355/597) South Thailand [65]
2011 E. coli   Preliminary study in Guangzhou, China [3]
2009 P. aeruginosa 45.8 % (54/118) Preliminary study in Guangzhou, China [19]
2008 Serratia 1/30; aacC1-ORFX-ORFY-aadA1 Canada [17]
2004 Stenotrophomonas maltophilia 22 % (20/93) Kaohsiung Medical University [36]
2013 P. aeruginosa 43 % 37/182 Guilan, Iran [44]
2011 K. pneumoniae 18/26 Blood stream infections [2]
2013 S. enteritidis 11.9 % (59) Taiwan [41]
2013 S. panama 40.0 % (20) Taiwan [41]
2010 P. aeruginosa High prevalence Iran [40]
2009 Aeromonas 16/41 (39.02 %); dfrA15-cmlA4-aadA2 Hidalgo, Mexico [32]