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Table 5 Number of positive test portions out of 20 test portions generated with HiCap broth stored at RT, HiCap broth and D/E broth stored at 4 °C before sample collection when the initial inoculation level was ~ 3000 CFU/square and 8000 ppm of Whisper™ V was applied to Lm cells before sampling

From: Comparison of three neutralizing broths for environmental sampling of low levels of Listeria monocytogenes desiccated on stainless steel surfaces and exposed to quaternary ammonium compounds

Storage condition between sample collection and analysis Number of positive test portions collected using neutralizing broths stored under different conditions before usea
HiCap at RT HiCap at 4 °C D/E at 4 °C
2 h at RT (p = 0.94)a 11 12 13
72 h at 4 °C (p = 0.71) 14 13 11
  1. aExtended Fisher’s exact tests for each row among different enrichment broths