|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5740084||1616232||2018||7 صفحه PDF||سفارش دهید||دانلود کنید|
- Antimicrobial stainless steel surface inhibitory to S.Â enterica was developed.
- Three antagonistic bacteria inhibitory to S.Â enterica were isolated and identified.
- Antagonistic bacteria formed biofilms on stainless steel at 25Â Â°C within 24Â h.
- Antagonistic bacteria in biofilm had significantly enhanced resistance to desiccation.
- Biofim formed by antagonistic bacteria inhibited S.Â enterica effectively.
Non-pathogenic bacterial biofilms were developed on the surface of stainless steel possessing desiccation tolerance and antimicrobial activity against Salmonella enterica. Three bacteria exhibiting strong antimicrobial activities against S.Â enterica were isolated from various soils, foods, and food-contact surfaces. Isolates were identified as Pseudomonas extremorientalis (strain Lettuce-28), Paenibacillus peoriae (strain Lettuce-7), and Streptomyces cirratus (strain Geumsan-207). These bacteria grew rapidly and formed biofilms within 24Â h on the surface of stainless steel coupons (SSCs) immersed in laboratory media (tryptic soy broth or Bennet's broth) at 25Â Â°C. Cells in biofilms had enhanced tolerance to desiccation (exposure to 43% atmospheric relative humidity [RH]) and retained antimicrobial activity against S.Â enterica. Populations of S.Â enterica deposited on SSCs containing biofilm formed by Ps. extremorientalis strain Lettuce-28, for example, decreased by > 2.5 log CFU/coupon within 24Â hÂ at 25Â Â°C and 43% RH, while the number of cells inoculated on SSCs lacking biofilm decreased by 1.5 log CFU/coupon. Antimicrobial activities of the three antagonistic bacteria against S.Â enterica persisted in desiccated biofilms. This study provides insights to developing strategies to inactivate Salmonella and perhaps other foodborne pathogens on abiotic surfaces using non-pathogenic antagonistic bacteria.
Journal: Food Microbiology - Volume 69, February 2018, Pages 136-142