For St. aureus counts, batches B (P b 0.001), D (P b 0.001), F (P = 0.012), G (P b 0.001) and H (P b 0.001) were significantly lower than batch A (control batch), while batches C (P=0.010) and E (P b 0.001) had significantly higher counts compared to the control batch. Listeria spp.