Figure 4.1 results of sections 1 to 16 of the copper rig removed simultaneously Legionella – on day 564. were found in sections 1 to 15 of the copper rig. No were found Legionella Legionella in section 16, which had been in the copper rig for 86 days. The results indicated that multiplied in biofilm in pipe sections that were in the copper rig for more Legionella than 86 days and that multiplication peaked in pipe sections that had been in the rig for 353 days after which multiplication dropped to only 300CFU found in the pipe section that had been in the copper rig for 547 days. Very surprisingly, no were found in the polyethylene rig sections 1 to 15 Legionella but a colony forming unit count of 1800CFU/500ml was found in section 16. non-pneumophila and serogroup 2 to 14 were found in the Legionella L. pneumophila copper rig sections. Only serogroup 2 to 14 were found in the L. pneumophila polyethylene section samples. results of samples taken from rigs A, after rigs B and C were inoculated Legionella with water and sections from rigs A (day 0), and before treatment was started (day 120), are shown in Graph 4.33 below. Page 166 of 229
Figure 4.1 Legionella results of sections 1 to 16 of the copper rig – removed simultaneously on day 564. Legionella were found in sections 1 to 15 of the copper rig. No Legionella were found in section 16, which had been in the copper rig for 86 days. The results indicated that Legionella multiplied in biofilm in pipe sections that were in the copper rig for more than 86 days and that multiplication peaked in pipe sections that had been in the rig for 353 days after which multiplication dropped to only 300CFU found in the pipe section that had been in the copper rig for 547 days. Very surprisingly, no Legionella were found in the polyethylene rig sections 1 to 15 but a colony forming unit count of 1800CFU/500ml was found in section 16. Legionella non-pneumophila and L. pneumophila serogroup 2 to 14 were found in the copper rig sections. Only L. pneumophila serogroup 2 to 14 were found in the polyethylene section samples. Legionella results of samples taken from rigs A, after rigs B and C were inoculated with water and sections from rigs A (day 0), and before treatment was started (day 120), are shown in Graph 4.33 below. Page 166 of 229
Birgitta-Bedford-Thesis-2012.docx