Table 3.
Summary of sequence-based typing (SBT) results of Christchurch Legionella pneumophila serogroup 1 (Lpsg1) isolates
| Comments | Sample source from | Sample origin | Date collected | Date received at ESR | Analyte | SBT allele | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| flaA | pilE | asd | mip | mompS | proA | ||||||
| Environmental Lpsg1 isolate from hospital prior to outbreak | Cooling tower water, Food Service Department, Christchurch Hospital | CHL | Unknown | 11 Nov. 04 | Lpsg1 isolate | 3 | 4 | 1 | 1 | 14 | 9 |
| Two Lpsg1 samples from same site | Cooling tower water, Ravensdown | Hill Labs | 1 Apr. 05 | 13 May 05 | Lpsg1 isolate | 1 | 4 | 3 | 1 | 1 | 1 |
| 1 Apr. 05 | 13 May 05 | Lpsg1 isolate | 1 | 4 | 3 | 1 | 1 | 1 | |||
| OB case, sputum | CHL | 11 May 05 | 20 May 05 | Lpsg1 isolate | 2 | 10 | 18 | 10 | 2 | 1 | |
| Original isolate dead | OB case, sputum | CHL | 1 June 05 | 10 June 05 | Lpsg1 isolate | 0 | 0 | 0 | 1 | 1 | 0 |
| Replacement isolate | OB case, sputum | CHL | 1 June 05 | 21 Dec. 06 | Lpsg1 isolate | 1 | 4 | 3 | 1 | 1 | 1 |
| 25 Canada Crescent, Hornby | Cooling tower water, Astron Plastics* | Hill Labs | 11 Aug. 05 | 5 Sept. 05 | Lpsg1 isolate | 7 | 10 | 17 | 6 | 13 | 11 |
| Christchurch School of Medicine | Hot water, 3rd floor | Hill Labs | 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 7 | 6 | 17 | 3 | 13 | 11 |
| 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 7 | 6 | 17 | 3 | 13 | 11 | |||
| 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 7 | 6 | 17 | 3 | 13 | 11 | |||
| Hot water, 1st floor café, kitchen | 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 7 | 6 | 17 | 3 | 13 | 11 | ||
| 3 Lpsg1 samples from same site with mixed Lpsg1 strains | Cooling tower water, Telecom CT#4, 91 Hereford St, Christchurch* | Hill Labs | 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 8 | 10 | 3 | 15 | 18 | 1 |
| 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 8 | 10 | 3 | 15 | 18 | 1 | |||
| 10 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 7 | 6 | 17 | 3 | 13 | 11 | |||
| 25 Canada Crescent, Hornby | Cooling tower water, Astron Plastics | Hill Labs | 11 Aug. 05 | 6 Sept. 05 | Lpsg1 isolate | 7 | 10 | 17 | 6 | 13 | 11 |
| Possible infection source | Cooling tower water, Ravensdown | Hill Labs | Unknown | 13 Sept. 06 | Lpsg1 isolate | 1 | 4 | 3 | 1 | 1 | 1 |
| OB cases with positive sputum by PCR | OB case, sputum | CHL | 10 June 05 | 19 Oct. 05 | PCR product | 1 | 4 | 3 | 1 | 1 | 1 |
| OB case, sputum | CHL | 9 Aug. 05 | 19 Oct. 05 | PCR product | 1 | 4 | 3 | 1 | 1 | 1 | |
| OB case, sputum | CHL | 26 July 05 | 19 Oct. 05 | PCR product | 1 | 4 | 1 | 1 | 0 | 1 | |
CHL, Canterbury Hospital Laboratory; OB, outbreak; PCR, polymerase chain reaction.
Grey shading denotes clinical cases, remainder are environmental cases.
*
Location added retrospectively after first report February 2007 (originally ‘Unknown’ location).