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Chapter 3
3.4.3. Intra-serovar variation in biofilm recovered after 168 hours
Table 3.3 displays the mean log 10 density of biofilm recovered from the 5
surfaces after 168 hour biofilm formation. As displayed, more cells were
recovered from the S. Agona outbreak strain S09-0494 biofilm than the
biofilm formed by the S. Agona reference strain SL483 on all 5 surfaces
(p=0.004 on all 5 surfaces). There was over a 1 log 10 CFU/coupon difference
in the number of cells recovered from the S. Agona S09-0494 in
comparison to the S. Agona SL483 strain when the biofilm was formed on
glass, steel, polycarbonate when the biofilm was formed over 168 hours.
The differences between S. Typhimurium S09-0419 and S. Typhimurium
reference strain SL1344 were less consistent as more cells were only
recovered from the S. Typhimurium S09-0419 biofilm on glass and tile.
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