Decontamination and survival of Enterobacteriaceae on shredded iceberg lettuce during storage

摘要: Abstract Enterobacteriaceae family can contaminate fresh produce at any stage of production either pre-harvest or post-harvest stages. The objectives the current study were to i) identify species on iceberg lettuce, ii) compare decontamination efficiency water, sodium hypochlorite (free chlorine 200 ppm), peroxyacetic acid (PA 80 ppm; Kenocid 2100®) their combinations and ionizing radiation against shredded lettuce iii) determine survival post-treatment storage 4, 10 25 °C, for up 7 days. Klebsiella pneumonia spp. pneumonia, Enterobacter cloacae, oxytoca, Pantoea spp., Leclercia adecarboxylata Kluyvera ascorbate identified lettuce. No significant difference (P ≥ 0.05) among after washing with water sanitizing 2100® (reduction ≤ 0.6 log CFU/g) found. Combined sanitizer treatments more effective than single washing/sanitizing treatments. Sanitization combined reduced by 0.85–2.24 CFU/g. Post-treatment growth during samples sanitized was washed water. D10-value 0.21 KGy. reduction populations gamma (0.6 KGy) 3 CFU/g, however, counts increased post-irradiation 4–5 CFU/g. Therefore, treatment (sodium hypochlorite/sodium hypochlorite, hypochlorite/Kenocid 2100®, 2100®/Kenocid total time 6 min exposing it irradiation decrease risk (reduction ≥ 2 log). Post-washing sliced (4, 10, 25 °C) could increase as even low temperatures.