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

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Chapter 2<br />

Table 2.5: Mean log 10 density and standard deviation <strong>of</strong> S. Enteritidis strains (measured in Mean Log 10 CFU/coupon)<br />

N Glass Steel Polycarbonate Concrete Tile<br />

Mean SD P Mean SD P Mean SD P Mean SD P Mean SD P<br />

S. Enteritidis (S09-0717) 9 4.85 0.55 4.73 0.50 5.20 0.495 6.43 0.34 7.02 0.16<br />

S. Enteritidis (S09-0004) 9 5.61 0.28 0.006 5.71 0.28 0.001 5.72 0.272 0.027 6.74 0.18 0.021 7.02 0.20 0.825<br />

Table 2.5 displays the mean log density <strong>of</strong> cells recovered from the 5 surfaces after 48 hour bi<strong>of</strong>ilm development using 6<br />

Salmonella enterica subspecies enterica serovar Enteritidis. The standard deviation <strong>of</strong> repeated measures (SD) for the nine<br />

observations (N=9) is also provided. The difference between the strains is denoted the p values in the table.<br />

Page<br />

75

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