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View/Open - ARAN - National University of Ireland, Galway

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Chapter 3<br />

Figure 3.1: The mean log 10 density <strong>of</strong> cells recovered from the surface<br />

after sonication for 7, 10 and 14 minutes<br />

Figure 3.1 displays the mean log 10 density <strong>of</strong> cells recovered from the 5<br />

surface after sonication for 7, 10 and 14 minutes. The results displayed are<br />

an accumulative mean for both the two Salmonella enterica subspecies<br />

enterica serovar Typhimurium strains (SL1344 and S09-0419). The<br />

difference between the strains is denoted by the use <strong>of</strong> the standard<br />

deviation (SD) error bars on the graph. The density is expressed in mean<br />

log 10 density <strong>of</strong> colony forming units per coupon (CFU/coupon).<br />

Page 95

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