Abstract
Summary The present study aimed to examine the antimicrobial activity of silkworm thorn ( Cudrania tricuspidata ) leaf extract (CTLE) and its application as a washing agent for fresh‐cut romaine lettuce and kale. The antimicrobial activities of CTLE at various concentrations against Listeria monocytogenes were determined using disc diffusion and viable cell count assays, and CTLE exhibited strong inactivation of L. monocytogenes . In particular, after the treatment with 0.4% CTLE, the protein content of L. monocytogenes cells was significantly ( P < 0.05) decreased from 507.21 to 254.58 μg mL −1 , and damaged cells were observed by scanning electron microscopy. CTLE washing resulted in approximately 2‐log reduction of microbial growth, similar to that of 0.01% NaOCl. In addition, CTLE washing did not affect the quality of romaine lettuce and kale. Therefore, these results suggest that CTLE is applicable as a new washing agent for inactivating L. monocytogenes on fresh‐cut romaine lettuce and kale.
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Claims 5
Claim · model-written summary
CTLE inactivated Listeria monocytogenes in antimicrobial assays.
- Taxon
- L. monocytogenes
Listeria monocytogenese0 - Treatment
- CTLEe0
- Outcome
- inactivation of L. monocytogenese0
- Direction
- inactivatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CTLE exhibited strong inactivation of L. monocytogenes”
Claim · model-written summary
At 0.4% CTLE, L. monocytogenes cellular protein content decreased significantly.
- Taxon
- L. monocytogenesListeria monocytogenese0
- Treatment
- 0.4% CTLEe0
- Outcome
- protein content of L. monocytogenes cellse0
- Direction
- decreasede0
- Value
- 254.58 μg mL −1e0
- Qualifier
- 507.21e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after the treatment with 0.4% CTLE, the protein content of L. monocytogenes cells was significantly ( P < 0.05) decreased from 507.21 to 254.58 μg mL −1”
Claim · model-written summary
CTLE treatment damaged L. monocytogenes cells.
- Taxon
- L. monocytogenesListeria monocytogenese1
- Outcome
- damaged cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“damaged cells were observed by scanning electron microscopy”
e1“CTLE exhibited strong inactivation of L. monocytogenes”
t0“Listeria monocytogenes”
Claim · model-written summary
CTLE washing reduced microbial growth by approximately 2 log, similarly to 0.01% NaOCl.
- Taxon
- romaine lettuce and kale
Brassica oleracea var. viridis
Lactuca sativa var. longifoliat0 - Treatment
- CTLE washinge0
- Outcome
- microbial growthe0
- Direction
- reductione0
- Value
- approximately 2‐loge0
- Comparator
- 0.01% NaOCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CTLE washing resulted in approximately 2‐log reduction of microbial growth, similar to that of 0.01% NaOCl”
t0“romaine lettuce and kale”
Claim · model-written summary
CTLE washing did not affect the quality of romaine lettuce and kale.
- Taxon
- romaine lettuce and kaleBrassica oleracea var. viridisLactuca sativa var. longifoliae0
- Treatment
- CTLE washinge0
- Outcome
- qualitye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CTLE washing did not affect the quality of romaine lettuce and kale”
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