Inactivation of Salmonella Typhimurium, Escherichia coli, and Staphylococcus aureus in Tilapia Fillets (Oreochromis niloticus) with Lactic and Peracetic Acid through Fogging and Immersion

被引:1
|
作者
Pierozan, Matheus Barp [1 ]
Alves, Jordana dos Santos [1 ]
Horn, Liege Dauny [1 ]
dos Santos, Priscila Alonso [1 ]
da Silva, Marco Antonio Pereira [1 ]
Egea, Mariana Buranelo [1 ]
Minafra, Cintia [2 ]
Cappato, Leandro Pereira [1 ]
Costa, Adriano Carvalho [1 ]
机构
[1] Inst Fed Goiano, Campus Rio Verde, BR-75901970 Rio Verde, Brazil
[2] Univ Fed Goias, Campus Samambaia, Goiania, Brazil
关键词
aerosolization; microbial inactivation; preservatives; food safety; Escherichia coli; Salmonella Typhimurium; Staphylococcus aureus; SHELF-LIFE; LISTERIA-MONOCYTOGENES; SENSORY QUALITY; FISH; REDUCTION; CONTAMINATION; O157-H7;
D O I
10.3390/foods13101520
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
This study investigated the antimicrobial effects of lactic acid (LA) (3%) and peracetic acid (PA) (300 ppm) on tilapia fillets (Oreochromis niloticus) by fogging (15 min) or by immersion (2 s) in a pool of Escherichia coli (NEWP 0022, ATCC 25922, and a field-isolated strain), Staphylococcus aureus (ATCC 25923 and a field-isolated strain), and Salmonella Typhimurium (ATCC 13311 and ATCC 14028), as well as the effects on the physicochemical characteristics of the fillets. Fogging was effective and the best application method to control S. Typhimurium regardless of the acid used, promoting reductions of 1.66 and 1.23 log CFU/g with PA and LA, respectively. Regarding E. coli, there were significant reductions higher than 1 log CFU/g, regardless of the treatment or acid used. For S. aureus, only immersion in PA showed no significant difference (p < 0.05). For other treatments, significant reductions of 0.98, 1.51, and 1.17 log CFU/g were observed for nebulized PA, immersion, and LA fogging, respectively. Concerning the pH of the samples, neither of the acids used differed from the control. However, treatments with LA, and fogging with PA, reduced the pH compared to immersion in PA. As for color parameters, L* and a* values showed changes regardless of the acid or method used, resulting in an improved perception of fillet quality. These results indicate that fogging and immersion are alternatives for reducing S. Typhimurium, E. coli, and S. aureus in tilapia fillets.
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页数:14
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