کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6289729 1616546 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric barrier discharge atmospheric cold plasma inhibits Escherichia coli O157:H7, Salmonella, Listeria monocytogenes, and Tulane virus in Romaine lettuce
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Dielectric barrier discharge atmospheric cold plasma inhibits Escherichia coli O157:H7, Salmonella, Listeria monocytogenes, and Tulane virus in Romaine lettuce
چکیده انگلیسی
The present study investigated the effects of dielectric barrier discharge atmospheric cold plasma (DACP) treatment on the inactivation of Escherichia coli O157:H7, Salmonella, Listeria monocytogenes, and Tulane virus (TV) on Romaine lettuce, assessing the influences of moisture vaporization, modified atmospheric packaging (MAP), and post-treatment storage on the inactivation of these pathogens. Romaine lettuce was inoculated with E. coli O157:H7, Salmonella, L. monocytogenes (~ 6 log CFU/g lettuce), or TV (~ 2 log PFU/g lettuce) and packaged in either a Petri dish (diameter: 150 mm, height: 15 mm) or a Nylon/polyethylene pouch (152 × 254 mm) with and without moisture vaporization. Additionally, a subset of pouch-packaged leaves was flushed with O2 at 5% or 10% (balance N2). All of the packaged lettuce samples were treated with DACP at 34.8 kV for 5 min and then analyzed either immediately or following post-treatment storage for 24 h at 4 °C to assess the inhibition of microorganisms. DACP treatment inhibited E. coli O157:H7, Salmonella, L. monocytogenes, and TV by 1.1 ± 0.4, 0.4 ± 0.3, 1.0 ± 0.5 log CFU/g, and 1.3 ± 0.1 log PFU/g, respectively, without environmental modifications of moisture or gas in the packages. The inhibition of the bacteria was not significantly affected by packaging type or moisture vaporization (p > 0.05) but a reduced-oxygen MAP gas composition attenuated the inhibition rates of E. coli O157:H7 and TV. L. monocytogenes continued to decline by an additional 0.6 log CFU/g in post-treatment cold storage for 24 h. Additionally, both rigid and flexible conventional plastic packages appear to be suitable for the in-package decontamination of lettuce with DACP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Food Microbiology - Volume 237, 21 November 2016, Pages 114-120
نویسندگان
, , , , , ,