{"title":"pH、营养成分和UV-C光处理对水培营养液中单核增生李斯特菌的影响。","authors":"Janny Mendoza, Ivannova Lituma, Kathryn Fontenot, Achyut Adhikari","doi":"10.1016/j.jfp.2025.100632","DOIUrl":null,"url":null,"abstract":"<p><p>Hydroponic nutrient solutions may create favorable conditions for the growth of environmental pathogens such as Listeria monocytogenes. This study evaluated the growth and survival of L. monocytogenes in distilled water and tomato, lettuce, and strawberry nutrient solutions at pH 5, 6, and 7 over 72 h, and assessed the effectiveness of UV-C treatment (1.32 mW/cm<sup>2</sup>) for microbial reduction. Distilled water at pH 5 supported limited survival, with counts decreasing from 2.96 to 2.20 log CFU/mL (p ≤ 0.05). In tomato solutions, L. monocytogenes levels showed minimal change, while lettuce and strawberry solutions supported significant growth, particularly at pH 6, indicating that both pH and nutrient composition influence pathogen behavior. UV-C treatment significantly (p ≤ 0.05) reduced L. monocytogenes across all nutrient solutions with greater reduction observed at longer exposure times. In lettuce solutions, 5, 10, and 15 s exposures decreased populations from 5.70 log CFU/mL to 4.61, 2.26, and 1.38 log CFU/mL, respectively, with similar reductions in tomato (to 4.49, 2.14, and 1.04 log CFU/mL) and strawberry solutions (to 4.50, 2.19, and 1.75 log CFU/mL). These results demonstrate that hydroponic solutions can facilitate L. monocytogenes survival depending on pH and nutrient content. While UV-C offers a promising intervention strategy, further work is needed to optimize decontamination approaches for hydroponic food production systems.</p>","PeriodicalId":15903,"journal":{"name":"Journal of food protection","volume":" ","pages":"100632"},"PeriodicalIF":2.8000,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of pH, nutrient composition, and UV-C light treatment on Listeria monocytogenes in hydroponic nutrient solutions.\",\"authors\":\"Janny Mendoza, Ivannova Lituma, Kathryn Fontenot, Achyut Adhikari\",\"doi\":\"10.1016/j.jfp.2025.100632\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Hydroponic nutrient solutions may create favorable conditions for the growth of environmental pathogens such as Listeria monocytogenes. This study evaluated the growth and survival of L. monocytogenes in distilled water and tomato, lettuce, and strawberry nutrient solutions at pH 5, 6, and 7 over 72 h, and assessed the effectiveness of UV-C treatment (1.32 mW/cm<sup>2</sup>) for microbial reduction. Distilled water at pH 5 supported limited survival, with counts decreasing from 2.96 to 2.20 log CFU/mL (p ≤ 0.05). In tomato solutions, L. monocytogenes levels showed minimal change, while lettuce and strawberry solutions supported significant growth, particularly at pH 6, indicating that both pH and nutrient composition influence pathogen behavior. UV-C treatment significantly (p ≤ 0.05) reduced L. monocytogenes across all nutrient solutions with greater reduction observed at longer exposure times. In lettuce solutions, 5, 10, and 15 s exposures decreased populations from 5.70 log CFU/mL to 4.61, 2.26, and 1.38 log CFU/mL, respectively, with similar reductions in tomato (to 4.49, 2.14, and 1.04 log CFU/mL) and strawberry solutions (to 4.50, 2.19, and 1.75 log CFU/mL). These results demonstrate that hydroponic solutions can facilitate L. monocytogenes survival depending on pH and nutrient content. While UV-C offers a promising intervention strategy, further work is needed to optimize decontamination approaches for hydroponic food production systems.</p>\",\"PeriodicalId\":15903,\"journal\":{\"name\":\"Journal of food protection\",\"volume\":\" \",\"pages\":\"100632\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-10-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of food protection\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jfp.2025.100632\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"BIOTECHNOLOGY & APPLIED MICROBIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of food protection","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1016/j.jfp.2025.100632","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
Effect of pH, nutrient composition, and UV-C light treatment on Listeria monocytogenes in hydroponic nutrient solutions.
Hydroponic nutrient solutions may create favorable conditions for the growth of environmental pathogens such as Listeria monocytogenes. This study evaluated the growth and survival of L. monocytogenes in distilled water and tomato, lettuce, and strawberry nutrient solutions at pH 5, 6, and 7 over 72 h, and assessed the effectiveness of UV-C treatment (1.32 mW/cm2) for microbial reduction. Distilled water at pH 5 supported limited survival, with counts decreasing from 2.96 to 2.20 log CFU/mL (p ≤ 0.05). In tomato solutions, L. monocytogenes levels showed minimal change, while lettuce and strawberry solutions supported significant growth, particularly at pH 6, indicating that both pH and nutrient composition influence pathogen behavior. UV-C treatment significantly (p ≤ 0.05) reduced L. monocytogenes across all nutrient solutions with greater reduction observed at longer exposure times. In lettuce solutions, 5, 10, and 15 s exposures decreased populations from 5.70 log CFU/mL to 4.61, 2.26, and 1.38 log CFU/mL, respectively, with similar reductions in tomato (to 4.49, 2.14, and 1.04 log CFU/mL) and strawberry solutions (to 4.50, 2.19, and 1.75 log CFU/mL). These results demonstrate that hydroponic solutions can facilitate L. monocytogenes survival depending on pH and nutrient content. While UV-C offers a promising intervention strategy, further work is needed to optimize decontamination approaches for hydroponic food production systems.
期刊介绍：
The Journal of Food Protection® (JFP) is an international, monthly scientific journal in the English language published by the International Association for Food Protection (IAFP). JFP publishes research and review articles on all aspects of food protection and safety. Major emphases of JFP are placed on studies dealing with:
Tracking, detecting (including traditional, molecular, and real-time), inactivating, and controlling food-related hazards, including microorganisms (including antibiotic resistance), microbial (mycotoxins, seafood toxins) and non-microbial toxins (heavy metals, pesticides, veterinary drug residues, migrants from food packaging, and processing contaminants), allergens and pests (insects, rodents) in human food, pet food and animal feed throughout the food chain;
Microbiological food quality and traditional/novel methods to assay microbiological food quality;
Prevention of food-related hazards and food spoilage through food preservatives and thermal/non-thermal processes, including process validation;
Food fermentations and food-related probiotics;
Safe food handling practices during pre-harvest, harvest, post-harvest, distribution and consumption, including food safety education for retailers, foodservice, and consumers;
Risk assessments for food-related hazards;
Economic impact of food-related hazards, foodborne illness, food loss, food spoilage, and adulterated foods;
Food fraud, food authentication, food defense, and foodborne disease outbreak investigations.
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