TABLE 1.
PFGE analysis of 23 potential salmonellosis outbreaks, 1999 to 2012a
| Potential outbreak | Serotype | No. of linked cases | Detection date | Antibiotic resistance | Cluster clonality |
|---|---|---|---|---|---|
| 1 | Enteritidis | 6 | Aug 1999 | SMZ | Clonal |
| 2 | Enteritidis | 6 | May 2001 | Nonclonal | |
| 3 | Typhimurium DT104 | 22 | Aug 2001 | AMP, CHL, TET, AMX, SPT, NAL, STR, SMZ | Clonal |
| 4 | Concord | 7 | May 2002 | SMZ | Clonal |
| 5 | Bredeney | 6 | Jun 2003 | SMZ | Clonal |
| 6 | Enteritidis | 10 | Aug 2004 | SMZ | Clonal |
| 7 | Typhimurium | 8 | Jun 2005 | NAL, SMZ | Clonal |
| 8 | Hadar | 3 | Jun 2005 | TET, STR, SMZ | Clonal |
| 9 | Typhimurium DT104 | 4 | Oct 2005 | AMP, CHL,TET, AMX, SPT, NAL, STR, SMZ | Clonal |
| 10 | 16:l,v:− | 6 | Dec 2005 | SMZ | Clonal |
| 11 | Java | 10 | Feb 2006 | AMP, TMP, TET, AMX, NAL, NIT, SMZ | Clonal |
| 12 | Mbandaka | 7 | May 2006 | SMZ | Clonal |
| 13 | Enteritidis | 8 | May–Jun 2006 | NIT, SMZ | Clonal |
| 14 | Hadar | 4 | Nov 2006 | AMP, TET, AMX, STR, SMZ | Clonal |
| 15 | Virchow | 4 | Jan 2007 | Nonclonal | |
| 16 | Enteritidis | 3 | Aug 2007 | AMP, AMX, SMZ | Clonal |
| 17 | Infantis | 10 | Jun 2009 | TET, SPT, NAL, STR, NIT, SMZ | Clonal |
| 18 | Agona | 3 | Jun 2009 | Nonclonal | |
| 19 | Enteritidis | 12 | Sep 2009 | SMZ | Clonal |
| 20 | Schwarzengrund | 4 | Aug 2009 | SMZ | Clonal |
| 21 | Havana | 99 | Mar–May 2011 | SMZ | Clonal |
| 22 | 9,12:l,v:− | 16 | Jun 2011 | TET, SMZ | Clonal |
| 23 | Typhimurium DT104 | 5 | Jun 2011 | AMP, CHL, TET, AMX, SPT, STR, SMZ | Clonal |
a
Abbreviations: Jan, January; Feb, February; Mar, March; Jun, June; Aug, August; Sep, September; Oct, October; Nov, November; Dec, December; AMX, amoxicillin; AMP, ampicillin; CHL, chloramphenicol; NAL, nalidixic acid; NIT, nitrofurantoin; SPT, spectinomycin; STR, streptomycin; SMZ, sulfamethoxazole; TET, tetracycline; TMP, trimethoprim.