Potential role of diploscapter sp. strain LKC25, a baterivorous nematode from soil, as a vector of food-borne pathogenic bacteria to preharvest fruits and vegetables

Article Abstract:

Diploscapter, a thermotolerant, free-living bacterial-feeding nematode is studied to determine its potential role as a vehicle of Salmonella enterica serotype Poona, enterohemorrhagic Escherichia coli O157:H7, and Listeria monocytogenes in contaminating preharvest fruits and vegetables. The potential of Diploscapter sp. strain LKC25 to shed pathogenic bacteria after exposure to bacteria inoculated into soil or a mixture of soil and composted turkey manure is investigated.

Vegetables, Vegetable and Melon Farming, Maryland, Agricultural chemicals, not elsewhere classified, Vegetables and melons, Fruit, Fruits (Food)

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Biofilm formation by Escherichia cole O157:H7 on stainless steel: Effect of exopolysaccharide and curli production on its resistance to chlorine

Article Abstract:

The resistance of Escherichia coli O157:H7 strains ATCC 43895-, 43895-EPS (an exopolysaccharide [EPS]-overproducing mutant) and ATCC 43895+ (a curli-producing mutant) to chlorine, a sanitizer commonly used in the food industry, was studied. It was found that the resistance of Escherichia coli O157:H7 to chlorine increased significantly as cells formed biofilm on coupons and strain ATCC 43895+ was the most resistant.

Genetic aspects, Microbial mats, Properties

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Ingestion of Salmonella enterica serotype Poona by a free-living nematode, Caenorhabditis elegans, and protection against inactivation by produce sanitizers

Article Abstract:

Results show that bacteria ingested by the nematode Caenorhabditis elegans are protected against chlorine treatment. Data indicate that 20 microgram of free chlorine per milliliter markedly reduce the population of Salmonella enterica serotype Poona on the surface of C. elegans and that higher amounts of chlorine cannot reach the bacteria that are protected by the cuticle of the nematode.

United States, Medicinal and Botanical Manufacturing, Medicinals and botanicals, Biocides, Usage, Evaluation, Biological control, Host-bacteria relationships, Farm produce, Agricultural products

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