摘要:
Provided are methods for rapid detection of microbial contaminants in fresh foods, comprising obtaining a product sample (preferably at or near the time of harvest of the product), applying, prior to any chilling of the sample or the product, an amount of a enrichment medium sufficient to cover the sample surfaces to provide a non-chilled sample for incubation, incubating the non-chilled sample for a time period and at a temperature sufficient to allow for amplification and enrichment of a non-cold-shocked target microbe, followed by recovering all or a portion of the enrichment media, concentrating the target microbes from the recovered enrichment medium, and detecting the concentrated target microbes.
摘要:
Aspects of the present invention provide novel multi-targeted microbiological screening and monitoring methods having substantial utility for monitoring and control of microbial growth and contaminants, microbiological processes, predictive microbiology, and for exposure and risk assessment. Microbial markers shared by both target and index microbes are used in novel methods for microbial monitoring, monitoring of microbial performance potential, trend analysis, and statistical process control (SPC) in processes or systems that are receptive to a plurality of genetically distinct microbes.
摘要:
Particular aspects provide a method of sampling, testing and validating test lots (e.g., single-unit production lots), comprising: assembling a plurality of product portions from each of a plurality of test lots and combining the collected product portions to provide a corresponding set of test lot samples (wherein each test lot sample is attributed to a particular corresponding test lot); enriching the set of test lot samples; removing equal portions of each enriched sample, and combining the removed portions to provide a modular composite sample; and testing of the modular composite sample for the target agent/organism, wherein where such testing is positive, individual test lots may nonetheless yet be validated by further testing of a respective enriched test lot sample and obtaining a negative test result. The methods have broad utility for monitoring all sorts of test lots (e.g., environmental lots, production lots, pharmaceutical lots, etc.) and for efficiently affecting informed, targeted remedial measures.
摘要:
Disclosed are devices and methods using the devices for collecting biological and other specimens or substances from surfaces being interrogated for such contamination. Particular device aspects comprise a handle, with a frame at one end receptive to insertion and removal of a sampling medium (collecting member) intended for wiping against a surface, with the sampling member being held in place by passive projections from the frame without the need for the use of glue or articulating or moving parts. The Frame and/or the collecting member may also comprise at least one attached or integral scraping member or surface for breaking biofilms and thus making the microbes or other substances more available to being sampled by the collecting member.
摘要:
Provided are methods for growing and shipping sprouts and microgreens in the same container, growing while in shipment using moisture provided in a water-absorbent layer, with optional added beneficials, and including methods for producing sprouts and microgreens for consumption, and for pharmaceutical/nutriceutical use, comprising growth of sprouts in retail-ready containers, the container comprising a moisture-retaining layer of agar media or the like providing water for growth and obviating the need for irrigation during sprout growth. In certain aspects, media is supplemented with beneficial organisms or additives such as probiotic microbes, vitamins (e.g., B12), cofactors, nutrients, and other items (e.g., phytochemicals, natural colors, and antioxidants) which promote the growth of the beneficial microbes on the product, and/or which become incorporated into the product. In certain aspects, added beneficial microorganisms are selected to compete/antagonize human pathogens such as Listeria, Salmonella, enterohaemorrhagic E. coli, Yersinia, and/or spoilage organisms (e.g., Erwinia, Pseudomonas and Xanthomonas).
摘要:
Methods of detecting target bacteria are provided. In some embodiments, the methods comprise exposing a sample to a phage capable of infecting target bacteria, said phage comprising a heterologous nucleic acid sequence encoding a marker. In some embodiments, the target bacteria comprise Listeria. In some embodiments, the target bacteria are all Listeria. Recombinant Listeria phage comprising a heterologous nucleic acid sequence encoding a marker are also provided as are useful combinations of such phage and articles of manufacture comprising such phage, among other things.
摘要:
Particular aspects provide a method of sampling, testing and validating test lots (e.g., single-unit production lots), comprising: assembling a plurality of product portions from each of a plurality of test lots and combining the collected product portions to provide a corresponding set of test lot samples (wherein each test lot sample is attributed to a particular corresponding test lot); enriching the set of test lot samples; removing equal portions of each enriched sample, and combining the removed portions to provide a modular composite sample; and testing of the modular composite sample for the target agent/organism, wherein where such testing is positive, individual test lots may nonetheless yet be validated by further testing of a respective enriched test lot sample and obtaining a negative test result. The methods have broad utility for monitoring all sorts of test lots (e.g., environmental lots, production lots, pharmaceutical lots, etc.) and for efficiently affecting informed, targeted remedial measures.
摘要:
Composition and methods for the detection of one or more target microbe(s) are provided. Compositions of the disclosure include at least one recombinant phage capable of infecting a target microbe, said phage comprising at least a capsid protein sequence, a ribosome binding site, and a codon-optimized marker. Compositions of the disclosure may further include an aqueous solution that enhances the ability to detect marker expression upon phage infection of the target microbe. In some embodiments the target microbe include is Listeria.
摘要:
Particular aspects provide a method of sampling, testing and validating test lots (e.g., single-unit production lots), comprising: assembling a plurality of product portions from each of a plurality of test lots and combining the collected product portions to provide a corresponding set of test lot samples (wherein each test lot sample is attributed to a particular corresponding test lot); enriching the set of test lot samples; removing equal portions of each enriched sample, and combining the removed portions to provide a modular composite sample; and testing of the modular composite sample for the target agent/organism, wherein where such testing is positive, individual test lots may nonetheless yet be validated by further testing of a respective enriched test lot sample and obtaining a negative test result. The methods have broad utility for monitoring all sorts of test lots (e.g., environmental lots, production lots, pharmaceutical lots, etc.) and for efficiently affecting informed, targeted remedial measures.
摘要:
Particular aspects provide a method of sampling, testing and validating test lots (e.g., single-unit production lots), comprising: assembling a plurality of product portions from each of a plurality of test lots and combining the collected product portions to provide a corresponding set of test lot samples (wherein each test lot sample is attributed to a particular corresponding test lot); enriching the set of test lot samples; removing equal portions of each enriched sample, and combining the removed portions to provide a modular composite sample; and testing of the modular composite sample for the target agent/organism, wherein where such testing is positive, individual test lots may nonetheless yet be validated by further testing of a respective enriched test lot sample and obtaining a negative test result. The methods have broad utility for monitoring all sorts of test lots (e.g., environmental lots, production lots, pharmaceutical lots, etc.) and for efficiently affecting informed, targeted remedial measures.