Full Text Journal Articles by
Author Joshua B Gurtler

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Biocidal Activity of Fast Pyrolysis Biochar against Escherichia coli O157:H7 in Soil Varies Based on Production Temperature or Age of Biochar.

Joshua B Gurtler, Charles A Mullen, Akwasi A Boateng, Ondřej Mašek, Mary J Camp,

ABSTRACT:Soils in which fresh produce is grown can become contaminated with foodborne pathogens and are sometimes then abandoned or removed from production. The application of biochar has been proposed as a method of bioremediating such pathogen-contaminated soils. The objectives of the present study were to evaluate three fast-pyrolysis-generated biochars (FPBC; ... Read more >>

J. Food Prot. (Journal of food protection)
[2020, 83(6):1020-1029]

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Two Generally Recognized as Safe Surfactants plus Acidulants Inactivate Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes in Suspension or on Dip-Inoculated Grape Tomatoes.

Joshua B Gurtler,

ABSTRACT:Contamination of fresh produce with the foodborne pathogens Salmonella enterica, Listeria monocytogenes, and Escherichia coli O157:H7 continues to be problematic, resulting in outbreaks of foodborne illness and costly corporate recalls. Various individual concentrations of citric or lactic acids (0.35 to 0.61%) or isopropyl citrate (0.16 to 0.54%) combined with two ... Read more >>

J Food Prot (Journal of food protection)
[2020, 83(4):637-643]

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Survival of Salmonella during Apple Dehydration as Affected by Apple Cultivar and Antimicrobial Pretreatment.

Joshua B Gurtler, Susanne E Keller, Xuetong Fan, O Modesto Olanya, Tony Jin, Mary J Camp,

ABSTRACT:Dehydrated fruits, including dried coconut (Cocos nucifera) and dried apple (Malus sp.) slices, have been the subject of manufacturer recalls due to contamination with Salmonella. A study was conducted to determine the survival of Salmonella on apple slices of six apple cultivars after dehydration and also following treatment with antimicrobial ... Read more >>

J. Food Prot. (Journal of food protection)
[2020, 83(5):902-909]

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Scientific Editors' Report.

Joshua B Gurtler, Lauren S Jackson, Elliot T Ryser, Panagiotis Skandamis,

J. Food Prot. (Journal of food protection)
[2020, 83(1):4-5]

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Interaction of Gaseous Chlorine Dioxide and Mild Heat on the Inactivation of Salmonella on Almonds.

Lin Wang, Joshua B Gurtler, Wenli Wang, Xuetong Fan,

The interactive effects of mild heat and gaseous chlorine dioxide (ClO2) on populations of Salmonella on almonds were studied. Almonds, dip inoculated with a two-strain cocktail of attenuated Salmonella Typhimurium, were treated with three concentrations of ClO2 at ambient temperature (ca. 22°C), and at 45, 50, 55, and 60°C for ... Read more >>

J. Food Prot. (Journal of food protection)
[2019, 82(10):1729-1735]

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Advanced oxidation process for the inactivation of Salmonella typhimurium on tomatoes by combination of gaseous ozone and aerosolized hydrogen peroxide.

Xuetong Fan, Kimberly J B Sokorai, Joshua B Gurtler,

Fresh produce-associated outbreaks of foodborne illnesses continue to occur every year in the U.S., suggesting limitations of current practices and the need for effective intervention technologies. Advanced oxidation process involves production of hydrogen radicals, which are the strongest oxidant. The objective of the present study was to evaluate the effectiveness ... Read more >>

Int. J. Food Microbiol. (International journal of food microbiology)
[2020, 312:108387]

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Thermal Inactivation Kinetics of Three Heat-Resistant Salmonella Strains in Whole Liquid Egg.

Joshua B Gurtler, Vijay K Juneja, Deana R Jones, Anuj Purohit,

The heat resistance of three heat-resistant strains of Salmonella was determined in whole liquid egg (WLE). Inoculated samples in glass capillary tubes were completely immersed in a circulating water bath and held at 56, 58, 60, 62, and 64°C for predetermined lengths of time. The recovery medium was tryptic soy ... Read more >>

J. Food Prot. (Journal of food protection)
[2019, 82(9):1465-1471]

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Challenges in Recovering Foodborne Pathogens from Low-Water-Activity Foods.

Joshua B Gurtler, Susanne E Keller, Jeffrey L Kornacki, Bassam A Annous, Tony Jin, Xuetong Fan,

There are numerous obstacles to the detection of foodborne pathogens in foods that exhibit a low water activity (aw). These obstacles include the presence of antimicrobial compounds, particulates, PCR inhibitors, and fatty matrices. New approaches should be sought to increase the sensitivity of pathogen testing in low-aw foods and to ... Read more >>

J. Food Prot. (Journal of food protection)
[2019, 82(6):988-996]

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Influence of Antimicrobial Agents on the Thermal Sensitivity of Foodborne Pathogens: A Review.

Joshua B Gurtler, Xuetong Fan, Tony Jin, Brendan A Niemira,

HIGHLIGHTS:Consumers are demanding more natural and organic foods and ingredients. Many additives alone are insufficient to inactivate pathogens or prevent growth. Mild heat combined with antimicrobial agents synergistically inactivate pathogens. Here we review studies using thermally assisted antimicrobial inactivation. Many opportunities exist for the application of this hurdle technology in ... Read more >>

J. Food Prot. (Journal of food protection)
[2019, 82(4):628-644]

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Microbiological Safety of Dried Spices.

Joshua B Gurtler, Susanne E Keller,

Spices in the desiccated state provide an environment that allows the survival of many foodborne pathogens. Currently, the incidence of pathogen-positive spices imported into the United States is 1.9 times higher than for any other imported food. Correspondingly, imported spices have been associated with numerous foodborne outbreaks and multiple product ... Read more >>

Annu Rev Food Sci Technol (Annual review of food science and technology)
[2019, 10:409-427]

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Composting To Inactivate Foodborne Pathogens for Crop Soil Application: A Review.

Joshua B Gurtler, Michael P Doyle, Marilyn C Erickson, Xiuping Jiang, Patricia Millner, Manan Sharma,

Compost is organic material that has been degraded into a nutrient-stabilized humus-like substance through intense microbial activity, which can provide essential plant nutrients (nitrogen, phosphorus) to aid in the growth of fruits and vegetables. Compost can be generated from animal waste feedstocks; these can contain human pathogens, which can be ... Read more >>

J. Food Prot. (Journal of food protection)
[2018, 81(11):1821-1837]

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Scientific Editors' Report.

Joshua B Gurtler, Lauren S Jackson, Elliot T Ryser, Panagiotis Skandamis,

J. Food Prot. (Journal of food protection)
[2019, 82(1):4-5]

Cited: 0 times

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Inactivation of Escherichia coli O157:H7 and Salmonella and Native Microbiota on Fresh Strawberries by Antimicrobial Washing and Coating.

Mingming Guo, Tony Z Jin, Joshua B Gurtler, Xuetong Fan, Madhav P Yadav,

Antimicrobial washing (AW), antimicrobial coating (AC), and a combination of washing followed by coating (AW+AC) were evaluated for their ability to inactivate artificially inoculated foodborne pathogens and native microbiota on strawberries stored at 4°C. Strawberries were inoculated with a six-strain composite of Escherichia coli O157:H7 and Salmonella; treated by AW, ... Read more >>

J. Food Prot. (Journal of food protection)
[2018, 81(8):1227-1235]

Cited: 1 time

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Salmonella enterica Contamination of Market Fresh Tomatoes: A Review.

Joshua B Gurtler, Nia A Harlee, Amanda M Smelser, Keith R Schneider,

Salmonella contamination associated with market fresh tomatoes has been problematic for the industry and consumers. A number of outbreaks have occurred, and dollar losses for the industry, including indirect collateral impact to agriculturally connected communities, have run into the hundreds of millions of dollars. This review covers these issues and ... Read more >>

J. Food Prot. (Journal of food protection)
[2018, 81(7):1193-1213]

Cited: 1 time

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Tomato type and post-treatment water rinse affect efficacy of acid washes against Salmonella enterica inoculated on stem scars of tomatoes and product quality.

Xuetong Fan, Joshua B Gurtler, Kimberly J B Sokorai,

A study was conducted to evaluate the effects of post-treatment rinsing with water on the inactivation efficacy of acid treatments against Salmonella inoculated onto stem scar areas of two types of tomatoes. In addition, impact on fruit quality was investigated during 21 days post-treatment storage at 10 °C. A four-strain cocktail of ... Read more >>

Int. J. Food Microbiol. (International journal of food microbiology)
[2018, 280:57-65]

Cited: 1 time

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Surfactant-Enhanced Organic Acid Inactivation of Tulane Virus, a Human Norovirus Surrogate.

Alison Lacombe, Brendan A Niemira, Joshua B Gurtler, David H Kingsley, Xinhui Li, Haiqiang Chen,

Combination treatments of surfactants and phenolic or short-chain organic acids (SCOA) may act synergistically or additively as sanitizers to inactive foodborne viruses and prevent outbreaks. The purpose of this study was to investigate the effect of gallic acid (GA), tannic acid, p-coumaric acid, lactic acid (LA), or acetic acid (AA), ... Read more >>

J. Food Prot. (Journal of food protection)
[2018, 81(2):279-283]

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Pathogen Decontamination of Food Crop Soil: A Review.

Joshua B Gurtler,

The purpose of this review is to delineate means of decontaminating soil. This information might be used to mitigate soil-associated risks of foodborne pathogens. The majority of the research in the published literature involves inactivation of plant pathogens in soil, i.e., those pathogens harmful to fruit and vegetable production and ... Read more >>

J. Food Prot. (Journal of food protection)
[2017, 80(9):1461-1470]

Cited: 2 times

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Selection of Surrogate Bacteria for Use in Food Safety Challenge Studies: A Review.

Mengyi Hu, Joshua B Gurtler,

Nonpathogenic surrogate bacteria are prevalently used in a variety of food challenge studies in place of foodborne pathogens such as Listeria monocytogenes, Salmonella, Escherichia coli O157:H7, and Clostridium botulinum because of safety and sanitary concerns. Surrogate bacteria should have growth characteristics and/or inactivation kinetics similar to those of target pathogens ... Read more >>

J. Food Prot. (Journal of food protection)
[2017, 80(9):1506-1536]

Cited: 2 times

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Nonthermal inactivation of norovirus surrogates on blueberries using atmospheric cold plasma

Alison Lacombe, Glenn Boyd, Haiqiang Chen, Joshua B Gurtler, David H Kingsley, Xinhui Li, Brendan A Niemira, Joseph Sites,

Viruses are currently the leading cause of foodborne outbreaks, most of which are associated with foods consumed raw. Cold plasma (CP) is an emerging novel nonthermal technology that can be used to surface decontaminate foods. This study investigated CP technology for the nonthermal inactivation of human norovirus surrogates, Tulane virus ... Read more >>

Food Microbiol. (Food microbiology.)
[2017, 63:1-5]

Cited: 2 times

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Nonthermal inactivation of norovirus surrogates on blueberries using atmospheric cold plasma.

Alison Lacombe, Brendan A Niemira, Joshua B Gurtler, Joseph Sites, Glenn Boyd, David H Kingsley, Xinhui Li, Haiqiang Chen,

Viruses are currently the leading cause of foodborne outbreaks, most of which are associated with foods consumed raw. Cold plasma (CP) is an emerging novel nonthermal technology that can be used to surface decontaminate foods. This study investigated CP technology for the nonthermal inactivation of human norovirus surrogates, Tulane virus ... Read more >>

Food Microbiol. (Food microbiology.)
[2017, 63:1-5]

Cited: 2 times

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Reduction of Bacterial Pathogens and Potential Surrogates on the Surface of Almonds Using High-Intensity 405-Nanometer Light.

Alison Lacombe, Brendan A Niemira, Joseph Sites, Glenn Boyd, Joshua B Gurtler, Breanna Tyrell, Melissa Fleck,

The disinfecting properties of high-intensity monochromatic blue light (MBL) were investigated against Escherichia coli O157:H7, Salmonella , and nonpathogenic bacteria inoculated onto the surface of almonds. MBL was generated from an array of narrow-band 405-nm light-emitting diodes. Almonds were inoculated with higher or lower levels (8 or 5 CFU/g) of ... Read more >>

J. Food Prot. (Journal of food protection)
[2016, 79(11):1840-1845]

Cited: 3 times

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Inactivation of Salmonella in Shell Eggs by Hot Water Immersion and Its Effect on Quality.

David J Geveke, Joshua B Gurtler, Deana R Jones, Andrew B W Bigley,

Thermal inactivation kinetics of heat resistant strains of Salmonella Enteritidis in shell eggs processed by hot water immersion were determined and the effects of the processing on egg quality were evaluated. Shell eggs were inoculated with a composite of heat resistant Salmonella Enteritidis (SE) strains PT8 C405, 2 (FSIS #OB030832), ... Read more >>

J Food Sci (Journal of food science)
[2016, 81(3):M709-14]

Cited: 1 time

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Salmonella isolated from ready-to-eat pasteurized liquid egg products: Thermal resistance, biochemical profile, and fatty acid analysis.

Joshua B Gurtler, Arthur Hinton, Rebecca B Bailey, William C Cray, Richard J Meinersmann, Takiyah A Ball, Tony Z Jin,

The Egg Products Inspection Act of 1970 requires that egg products in the U.S. must be pasteurized prior to release into commerce. The USDA Food Safety and Inspection Service (FSIS) is responsible for regulating egg products. Salmonellae are infrequently isolated from pasteurized egg products by food manufacturers or the FSIS ... Read more >>

Int. J. Food Microbiol. (International journal of food microbiology)
[2015, 206:109-117]

Cited: 3 times

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Influence of mycorrhizal fungi on fate of E. coli O157:H7 and Salmonella in soil and internalization into Romaine lettuce plants.

April M Nicholson, Joshua B Gurtler, Rebecca B Bailey, Brendan A Niemira, David D Douds,

The objectives of this study were to determine the influence of a symbiotic arbuscular mycorrhizal (AM) fungus on persistence of Salmonella and enterohemorrhagic Escherichia coli O157:H7 (EHEC) within soil, and survival within Romaine lettuce. Romaine seedlings were grown with or without AM fungi. Soil surrounding plants was inoculated with ca. ... Read more >>

Int. J. Food Microbiol. (International journal of food microbiology)
[2015, 192:95-102]

Cited: 2 times

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Reduction of an E. coli O157:H7 and Salmonella composite on fresh strawberries by varying antimicrobial washes and vacuum perfusion.

Joshua B Gurtler, Rebecca B Bailey, Tony Z Jin, Xuetong Fan,

A 2011 outbreak of hemorrhagic colitis, which resulted in the death of two individuals, was associated with contaminated strawberries. A study was conducted to identify antimicrobial washes effective at reducing E. coli O157:H7 and Salmonella enterica from the surface of fresh whole strawberries during two-minute immersion washes. Twenty-seven antimicrobial treatments ... Read more >>

Int. J. Food Microbiol. (International journal of food microbiology)
[2014, 189:113-118]

Cited: 2 times

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