Table 3.
Class 2, 3, and 4 integron incidence and predominance in Gram-positive and Gram-negative microbial species (Deng et al., 2015).
| Class 2 integrons | |||
|---|---|---|---|
| Bacterial strain | Integron prevalence and the wide range of gene cassettes | Sampling | References |
| Escherichia coli | 7.4% (31/417); dfrA1-sat2-aadA1 (77.4%, 24/31), estX-sat2-aadA1 (19.4%, 6/31) and estX-sat2-△aadA1 (3.2%, 1/31) | BfT-GermVet monitoring study, Germany, 2004–2006 | Kadlec and Schwarz (2008) |
| Enterobacteriaceae | 34.9% (52/149); II2 (Tn7), III2 (estX-sat2-aadA1-orfX, most widely distributed) and IV2 (aadA1, first reported) | E. coli and K. pneumoniae strains from swine and chickens, Portugal | Machado et al. (2008) |
| Escherichia coli | One out of 322 | Irrigation water and associated sediments, El Paso, Presidio and Weslaco | Roe et al. (2003) |
| Escherichia coli | 3.0% (3/100) | Spain | Vinué et al. (2008) |
| Escherichia coli | 3.6% (4/111); dfrA1-sat1-aadA1 | The preliminary study, Guangzhou, China | Su et al. (2006) |
| Coliforms | 2.7% (5/183) | Rivers in the northern region of Turkey | Ozgumus et al. (2009) |
| Pseudomonas aeruginosa | 19.5% (23/118); dfrA1-sat1-aadA1, first report of class 2 integron in this species of bacteria | A preliminary study, Guangzhou, China | Xu et al. (2009) |
| S. enteritidis | 4.3%; estX-sat2-aadA1 | Poultry samples, Japan | Ahmed et al. (2005) |
| S. enterica | 85 contemporary multidrug resistants D-Tartrate-Positive isolates; dfrA1-sat1-aadA1 | S. enterica Serovar Paratyphi B isolates Germany, 1995–2001 | Miko et al. (2003) |
| S. sonneii | 93% (2/43) | Senegal adults diagnosed with diarrhea | Gassama-Sow et al. (2006) |
| Shigella flexneri | 100% (58/58); dfrA1-sat1-aadA1 | Samples of stool from people suffering from sporadic diarrhea, China, 2005–2006 | Zhu et al. (2011) |
| E. faecalis | Two strains harboring class 1 and 2 integrons; dfrA1-sat1-aadA1, first evidence of class 2 integron in G+ bacteria | A preliminary study, Guangzhou, China | Xu et al. (2010) |
| Class 3 integrons | |||
| Escherichia coli | ges1/oxa10:aac (6) | Switzerland | |
| Serratia marcescens | imp1/aacA4 | Japan | Collis et al. (2002) |
| Klebsiella pneumoniae | ges1/oxa10: aacA4 | Portugal’s critical care unit patient’s urine | Ploy et al. (2003) |
| Class 4 integrons | |||
| Vibrio cholerae | Collection de I’Institut Pasteur (CIP) | Shibata et al. (2003) and Poirel et al. (2010) | |
| V. metschnikovii | Shibata et al. (2003) | ||