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Our research team develops novel tools to improve food safety

2018 Publications

Thienes CP, Masiri J, Benoit LA, Barrios-Lopez B, Samuel SA, Krebs RA, Cox DP, Dobritsa AP, Nadala C, Samadpour M. Quantitative Detection of Beef Contamination in Cooked Meat Products by ELISA. J AOAC Int. 2018 Sep 18.

Janagama HK, Mai T, Han S, Nadala L, Nadala C, Samadpour M. Simultaneous Detection of Multiple Wine-Spoilage Organisms Using a PCR-Based DNA Dipstick Assay. J AOAC Int. 2018 Aug 20.

Dobritsa AP, Kutumbaka KK, Samadpour M. Reclassification of Eubacterium combesii and discrepancies in the nomenclature of botulinum neurotoxin-producing clostridia: Challenging Opinion 69. Request for an Opinion. Int J Syst Evol Microbiol. 2018 Jul 30.

Thienes CP, Masiri J, Benoit LA, Barrios-Lopez B, Samuel SA, Meshgi MA, Cox DP, Dobritsa AP, Nadala C, Samadpour M. Quantitative Detection of Chicken and Turkey Contamination in Cooked Meat Products by ELISA. J AOAC Int. 2018 Jul 13.

Ha Y, Thienes CP, Agapov AA, Laznicka AV, Han S, Nadala C, Samadpour M. Comparison of ELISA and DNA Lateral Flow Assays for Detection of Pork, Horse, Beef, Chicken, Turkey, and Goat Contamination in Meat Products. J AOAC Int. 2018 Jul 6.

Arias-Rios EV, Tenney K, Mai T, Anderson S, Cantera RM, Nadala LM, Han S, Janagama H, Pando JM, Selover B, Sung SL, Nadala C, Samadpour M. Rapid Detection of Listeria in Ice Cream in 13 Hours Using the Roka Listeria Detection Assay. J AOAC Int. 2018 Jul 2.

Mai TL, Sung SL, Shapovalova A, Janagama HK, Vuong L, Friedrich A, Johnson D, Nadala LM, Nguyen V, Nadala EC Jr, Samadpour M. Performance Validation of the Microbiologique MicrofilmTM Test System for AOAC Research Institute Performance Tested MethodSMCertification. J AOAC Int. 2018 May 3.

Thienes CP, Masiri J, Benoit LA, Barrios-Lopez B, Samuel SA, Cox DP, Dobritsa AP, Nadala C, Samadpour M. Quantitative Detection of Horse Contamination in Cooked Meat Products by ELISA. J AOAC Int. 2018 May 1.

Thienes CP, Masiri J, Benoit LA, Barrios-Lopez B, Samuel SA, Cox DP, Dobritsa AP, Nadala C, Samadpour M. Quantitative Detection of Pork Contamination in Cooked Meat Products by ELISA. J AOAC Int. 2018 May 1.

Janagama HK, Mai T, Han S, Nadala L, Nadala C, Samadpour M. Dipstick Assay for Rapid Detection of Beer Spoilage Organisms. J AOAC Int. 2018 Apr 27.

Banerjee K, Peirson B, Hu C, Carrier E, Malsick L, Tarasova Y, Daudenarde S, Brownell D, Koeris M, Klass N, Bird P, Benzinger MJ, Agin J, Goins D. The Validation of the Sample6 DETECTTM  HT/L for AOAC Research Institute. J AOAC Int. 2018 April 4.

Maroni B, Lopez T, Neal C, Verver S, Puente C, Lauffer J, Garcia J, Groschel B, Dreyling E, Chaney WE, Bastin B, Bird P, Benzinger MJ, Agin J, Goins D, Hariram U, Chen Y, Ryser E, Brodsky M. Method Modification for the Atlas Listeria Environmental LE Detection Assay Using FoodChek Actero Listeria Enrichment Media and Half-Fraser Media for the Detection of Listeria spp. from Environmental Surfaces. J AOAC Int. 2018 Mar 1.

2017 Publications

Dobritsa AP, Linardopoulou EV, Samadpour M. Transfer of 13 species of the genus Burkholderia to the genus Caballeronia and reclassification of Burkholderia jirisanensis as Paraburkholderia jirisanensis comb. nov. Int J Syst Evol Microbiol. 2017 Oct 7.

Chaney WE, Agga GE, Nguyen SV, Arthur TM, Bosilevac JM, Dreyling E, Rishi A, Brichta-Harhay D. Rapid Detection and Classification of Salmonella enterica Shedding in Feedlot Cattle Utilizing the Roka Bioscience Atlas Salmonella Detection Assay for the Analysis of Rectoanal Mucosal Swabs. J Food Prot. 2017 Oct.

Murphy HR, Cinar HN, Gopinath G, Noe KE, Chatman LD, Miranda NE, Wetherington JH, Neal-McKinney J, Pires GS, Sachs E, Stanya KJ, Johnson CL, Nascimento FS, Santin M, Molokin A, Samadpour M, Janagama H, Kahler A, Miller C, da Silva AJ. Interlaboratory validation of an improved method for detection of Cyclospora cayetanensis in produce using a real-time PCR assay. Food Microbiol. 2017 Aug 17.

Dobritsa AP, Kutumbaka KK, Werner K, Wiedmann M, Asmus A, Samadpour M. Clostridium tepidum sp. nov., a close relative of Clostridium sporogenes and Clostridium botulinum Group I. Int J Syst Evol Microbiol. 2017 July 10.

Buser GL, Cassidy PM, Pfeiffer CD, Townes JM, Morey KE, Rayar J, Kutumbaka KK, Han S, Nadala C, Samadpour M, Weissman SJ, Vega R, Beldavs ZG. New Delhi metallo-β-lactamase-1 (NDM-1) Escherichia coli isolated from household vacuum cleaner-Oregon, 2013. IDCases. 2017 Jun 15.

Benoit L, Masiri J, Del Blanco IA, Meshgi M, Gendel SM, Samadpour M. Assessment of Avenins from Different Oat Varieties Using R5-Based Sandwich ELISA. J Agric Food Chem. 2017 Mar 1.

2016 Publications

Dobritsa AP, Samadpour M. The status of the genus Pseudoroseovarius Sun et al. 2015. Int J Syst Evol Microbiol. 2016 Dec 1.

Masiri J, Benoit L, Barrios-Lopez B, Thienes C, Meshgi M, Agapov A, Dobritsa A, Nadala C, Samadpour M. Development and validation of a rapid test system for detection of pork meat and collagen residues. Meat Sci. 2016 Nov.

Dobritsa AP, Kutumbaka KK, Samadpour M. Reclassification of Paraburkholderia panaciterrae (Farh et al. 2015) Dobritsa & Samadpour 2016 as a later synonym of Paraburkholderia ginsengiterrae (Farh et al. 2015) Dobritsa & Samadpour2016. Int J Syst Evol Microbiol. 2016 Oct.

Masiri J, Benoit L, Meshgi M, Day J, Nadala C, Samadpour M. A Novel Immunoassay Test System for Detection of Modified Allergen Residues Present in Almond-, Cashew-, Coconut-, Hazelnut-, and Soy-Based Nondairy Beverages. J Food Prot. 2016 Sep.

Dobritsa AP, Samadpour M. Transfer of eleven species of the genus Burkholderia to the genus Paraburkholderia and proposal of Caballeronia gen. nov. to accommodate twelve species of the genera Burkholderia and Paraburkholderia. Int J Syst Evol Microbiol. 2016 Aug 1.

Masiri J, Benoit L, Katepalli M, Meshgi M, Cox D, Nadala C, Sung SL, Samadpour M. Novel Monoclonal Antibody-Based Immunodiagnostic Assay for Rapid Detection of Deamidated Gluten Residues. J Agric Food Chem. 2016 May 11.

Masiri J, Barrios-Lopez B, Benoit L, Tamayo J, Day J, Nadala C, Sung SL, Samadpour M. Development and Validation of a Lateral Flow Immunoassay Test Kit for Dual Detection of Casein and β-Lactoglobulin Residues. J Food Prot. 2016 Mar.

Garber EA, Parker CH, Handy SM, Cho CY, Panda R, Samadpour M, Reynaud DH, Ziobro GC. Presence of Undeclared Food Allergens in Cumin: The Need for Multiplex Methods. J Agric Food Chem. 2016 Feb 10.

2015 Publications

Kutumbaka KK, Pasmowitz J, Mategko J, Reyes D, Friedrich A, Han S, Martens-Habbena W, Neal-McKinney J, Janagama HK, Nadala C, Samadpour M. Draft Genome Sequence of the Beer Spoilage Bacterium Megasphaera cerevisiae Strain PAT 1T. Genome Announc. 2015 Sep 10.

Liu Y, Ramesh Kumar N, Lai Q, Du J, Dobritsa AP, Samadpour M, Shao Z. Identification of strains Bacillus aerophilus MTCC 7304T as Bacillus altitudinis and Bacillus stratosphericus MTCC 7305T as a Proteus sp. and the status of the species Bacillus aeriusShivaji et al. 2006. Request for an Opinion. Int J Syst Evol Microbiol. 2015 Sep.

Cappillino M, Shivers RP, Brownell DR, Jacobson B, King J, Kocjan P, Koeris M, Tekeian E, Tempesta A, Bowers J, Crowley E, Bird P, Benzinger J, Fisher K. Sample6 DETECT/L: an in-plant, in-shift, enrichment-free Listeria environmental assay. J AOAC Int. 2015 Mar-Apr.

Koohmaraie M, Bosilevac JM, De La Zerda M, Motlagh AM, Samadpour M. Distribution of Escherichia coli passaged through processing equipment during ground beef production using inoculated trimmings. J Food Prot. 2015 Feb.

2014 Publications

Bres V, Yang H, Hsu E, Ren Y, Cheng Y, Wisniewski M, Hanhan M, Zaslavsky P, Noll N, Weaver B, Campbell P, Reshatoff M, Becker M. Atlas(®) Listeria monocytogenes LmG2 Detection Assay Using Transcription Mediated Amplification to Detect Listeria monocytogenes in Selected Foods and Stainless Steel Surface. J AOAC Int. 2014 Sep-Oct.

Mazengia E, Samadpour M, Hill HW, Greeson K, Tenney K, Liao G, Huang X, Meschke JS. Prevalence, concentrations, and antibiotic sensitivities of Salmonella serovars in poultry from retail establishments in Seattle, Washington. J Food Prot. 2014 Jun.

Kutumbaka KK, Han S, Mategko J, Nadala C, Buser GL, Cassidy MP, Beldavs ZG, Weissman SJ, Morey KE, Vega R, Samadpour M. Draft Genome Sequence of blaNDM-1-Positive Escherichia coli O25b-ST131 Clone Isolated from an Environmental Sample. Genome Announc. 2014 May 29.

Kooken J, Fox K, Fox A, Altomare D, Creek K, Wunschel D, Pajares-Merino S, Martínez-Ballesteros I, Garaizar J, Oyarzabal O, Samadpour M. Reprint of “Identification of staphylococcal species based on variations in protein sequences (mass spectrometry) and DNA sequence (sodA microarray)”. Mol Cell Probes. 2014 Apr-Jun.

2013 Publications

Miksch RR, Leek J, Myoda S, Nguyen T, Tenney K, Svidenko V, Greeson K, Samadpour M. Prevalence and counts of Salmonella and enterohemorrhagic Escherichia coli in raw, shelled runner peanuts. J Food Prot. 2013 Oct.

Laidler MR, Tourdjman M, Buser GL, Hostetler T, Repp KK, Leman R, Samadpour M, Keene WE. Escherichia coli O157:H7 infections associated with consumption of locally grown strawberries contaminated by deer. Clin Infect Dis. 2013 Oct.

Oyarzabal OA, Williams A, Zhou P, Samadpour M. Improved protocol for isolation of Campylobacter spp. from retail broiler meat and use of pulsed field gel electrophoresis for the typing of isolates. J Microbiol Methods. 2013 Oct.

Kwong W, Livezey K, Reshatoff M, Vaughn S, Freed A, Puente C, Hu E, Zukowski A, Schweis F, Yang H, Fleischer C, Kamantigue E, Morgan J, Koehler R, Maroni B, Becker M, Wisniewski M. Atlas Salmonella detection method using transcription mediated amplification (TMA) to detect Salmonella enterica in a variety of foods and select surfaces. J AOAC Int. 2013 Jul-Aug.

2012 Publications

Koohmaraie M, Scanga JA, De La Zerda MJ, Koohmaraie B, Tapay L, Beskhlebnaya V, Mai T, Greeson K, Samadpour M. Tracking the sources of salmonella in ground beef produced from nonfed cattle. J Food Prot. 2012 Aug.

Kisiela DI, Chattopadhyay S, Libby SJ, Karlinsey JE, Fang FC, Tchesnokova V, Kramer JJ, Beskhlebnaya V, Samadpour M, Grzymajlo K, Ugorski M, Lankau EW, Mackie RI, Clegg S, Sokurenko EV. Evolution of Salmonella enterica virulence via point mutations in the fimbrial adhesin. PLoS Pathog. 2012

Green HC, Dick LK, Gilpin B, Samadpour M, Field KG. Genetic markers for rapid PCR-based identification of gull, Canada goose, duck, and chicken fecal contamination in water. Appl Environ Microbiol. 2012 Jan.

2011 Publications

Hill WE, Suhalim R, Richter HC, Smith CR, Buschow AW, Samadpour M. Polymerase chain reaction screening for Salmonella and enterohemorrhagic Escherichia coli on beef products in processing establishments. Foodborne Pathog Dis. 2011 May 11.

2010 Publications

Dobritsa AP, Reddy MC, Samadpour M. Reclassification of Herbaspirillum putei as a later heterotypic synonym of Herbaspirillum huttiense, with the description of H. huttiense subsp. huttiense subsp. nov. and H. huttiense subsp. putei subsp. nov., comb. nov., and description of Herbaspirillum aquaticum sp. nov. Int J Syst Evol Microbiol. 2010

2009 Publications

Czaja CA, Stamm WE, Stapleton AE, Roberts PL, Hawn TR, Scholes D, Samadpour M, Hultgren SJ, Hooton TM. Prospective cohort study of microbial and inflammatory events immediately preceding Escherichia coli recurrent urinary tract infection in women. J Infect Dis. 2009 Aug 15.

Kulasekara BR, Jacobs M, Zhou Y, Wu Z, Sims E, Saenphimmachak C, Rohmer L, Ritchie JM, Radey M, McKevitt M, Freeman TL, Hayden H, Haugen E, Gillett W, Fong C, Chang J, Beskhlebnaya V, Waldor MK, Samadpour M, Whittam TS, Kaul R, Brittnacher M, Miller SI. Analysis of the genome of the Escherichia coli O157:H7 2006 spinach-associated outbreak isolate indicates candidate genes that may enhance virulence. Infect Immun. 2009 June 29.

2008 Publications

Stopforth JD, Kottapalli B, Samadpour M. Sterility testing of a dispensing valve for aseptic function in food service applications. J Food Prot. 2008 Mar.

Stopforth JD, Mai T, Kottapalli B, Samadpour M. Effect of acidified sodium chlorite, chlorine, and acidic electrolyzed water on Escherichia coli O157:H7, Salmonella, and Listeria monocytogenes inoculated onto leafy greens. J Food Prot. 2008 Mar.

Stopforth JD, Suhalim R, Kottapalli B, Hill WE, Samadpour M. Thermal inactivation D- and z-values of multidrug-resistant and non-multidrug-resistant Salmonella serotypes and survival in ground beef exposed to consumer-style cooking. J Food Prot. 2008 Mar.

2007 Publications

Field KG, Samadpour M. Fecal source tracking, the indicator paradigm, and managing water quality. Water Res. 2007 Aug

Stopforth JD, O’Connor R, Lopes M, Kottapalli B, Hill WE, Samadpour M. Validation of individual and multiple-sequential interventions for reduction of microbial populations during processing of poultry carcasses and parts. J Food Prot. 2007 Jun.

2006 Publications

Meays CL, Broersma K, Nordin R, Mazumder A, Samadpour M. Diurnal variability in concentrations and sources of Escherichia coli in three streams. Can J Microbiol. 2006 Nov.

Meays CL, Broersma K, Nordin R, Mazumder A, Samadpour M. Spatial and annual variability in concentrations and sources of Escherichia coli in multiple watersheds. Environ Sci Technol. 2006 Sep.

Stopforth JD, Lopes M, Shultz JE, Miksch RR, Samadpour M. Microbiological status of fresh beef cuts. J Food Prot. 2006 Jun.

Stopforth JD, Lopes M, Shultz JE, Miksch RR, Samadpour M. Location of bung bagging during beef slaughter influences the potential for spreading pathogen contamination on beef carcasses. J Food Prot. 2006 June.

Lopes M, Stopforth JD, Sucre K, Miksch RR, Giddens E, Reddy MC, Yemm RS, Samadpour M. Alternative cutting methods to minimize transfer of nervous system tissue during steak preparation from bone-in short loins. J Food Prot. 2006 June.

Samadpour M, Barbour MW, Nguyen T, Cao TM, Buck F, Depavia GA, Mazengia E, Yang P, Alfi D, Lopes M, Stopforth JD. Incidence of enterohemorrhagic Escherichia coli, Escherichia coli O157, Salmonella, and Listeria monocytogenes in retail fresh ground beef, sprouts, and mushrooms. J Food Prot. 2006 Feb.

2005 Publications

Hooton TM, Samadpour M. Is acute uncomplicated urinary tract infection a foodborne illness, and are animals the source? Clin Infect Dis. 2005 Jan 15.

Samadpour M, Roberts MC, Kitts C, Mulugeta W, Alfi D. The use of ribotyping and antibiotic resistance patterns for identification of host sources of Escherichia coli strains. Lett Appl Microbiol. 2005.

2004 Publications

Stoeckel DM, Mathes MV, Hyer KE, Hagedorn C, Kator H, Lukasik J, O’Brien TL, Fenger TW, Samadpour M, Strickler KM, Wiggins BA. Comparison of seven protocols to identify fecal contamination sources using Escherichia coli. Environ Sci Technol. 2004 Nov 15

Wilkerson C, Samadpour M, van Kirk N, Roberts MC. Antibiotic resistance and distribution of tetracycline resistance genes in Escherichia coli O157:H7 isolates from humans and bovines. Antimicrob Agents Chemother. 2004 Mar.

Keene WE, Markum AC, Samadpour M. Outbreak of Pseudomonas aeruginosa infections caused by commercial piercing of upper ear cartilage. JAMA. 2004 Feb 25.

2003 Publications

Myoda SP, Carson CA, Fuhrmann JJ, Hahm BK, Hartel PG, Yampara-Lquise H, Johnson L, Kuntz RL, Nakatsu CH, Sadowsky MJ, Samadpour M. Comparison of genotypic-based microbial source tracking methods requiring a host origin database. J Water Health. 2003 Dec.

Harwood VJ, Wiggins B, Hagedorn C, Ellender RD, Gooch J, Kern J, Samadpour M, Chapman AC, Robinson BJ, Thompson BC. Phenotypic library-based microbial source tracking methods: efficacy in the California collaborative study. J Water Health. 2003 Dec.

Davis MA, Hancock DD, Besser TE, Rice DH, Hovde CJ, Digiacomo R, Samadpour M, Call DR. Correlation between geographic distance and genetic similarity in an international collection of bovine faecal Escherichia coli O157:H7 isolates. Epidemiol Infect. 2003 Oct.

Zhang C, Zhang M, Ju J, Nietfeldt J, Wise J, Terry PM, Olson M, Kachman SD, Wiedmann M, Samadpour M, Benson AK. Genome diversification in phylogenetic lineages I and II of Listeria monocytogenes: identification of segments unique to lineage II populations. J Bacteriol. 2003 Sep.

Davis MA, Hancock DD, Rice DH, Call DR, DiGiacomo R, Samadpour M, Besser TE. Feedstuffs as a vehicle of cattle exposure to Escherichia coli O157:H7 and Salmonella enterica. Vet Microbiol. 2003 Sep 1.

Renter DG, Sargeant JM, Oberst RD, Samadpour M. Diversity, frequency, and persistence of Escherichia coli O157 strains from range cattle environments. Appl Environ Microbiol. 2003 Jan.

2002 Publications

Samadpour M, Kubler M, Buck FC, Depavia GA, Mazengia E, Stewart J, Yang P, Alfi D. Prevalence of Shiga toxin-producing Escherichia coli in ground beef and cattle feces from King County, Washington. J Food Prot. 2002 Aug.

Samadpour M, Stewart J, Steingart K, Addy C, Louderback J, McGinn M, Ellington J, Newman T. Laboratory investigation of an E. coli O157:H7 outbreak associated with swimming in Battle Ground Lake, Vancouver, Washington. J Environ Health. 2002 June.

2000 Publications

Hooton TM, Scholes D, Stapleton AE, Roberts PL, Winter C, Gupta K, Samadpour M, Stamm WE. A prospective study of asymptomatic bacteriuria in sexually active young women. N Engl J Med. 2000 Oct 5.

Jackson LA, Keene WE, McAnulty JM, Alexander ER, Diermayer M, Davis MA, Hedberg K, Boase J, Barrett TJ, Samadpour M, Fleming DW. Where’s the beef? The role of cross-contamination in 4 chain restaurant-associated outbreaks of Escherichia coli O157:H7 in the Pacific Northwest. Arch Intern Med. 2000 Aug 14-28.

1995 Publications

Grimm LM, Goldoft M, Kobayashi J, Lewis JH, Alfi D, Perdichizzi AM, Tarr PI, Ongerth JE, Moseley SL, Samadpour M. Molecular epidemiology of a fast-food restaurant-associated outbreak of Escherichia coli O157:H7 in Washington State. J Clin Microbiol. 1995 Aug.

Samadpour M. Molecular epidemiology of Escherichia coli O157:H7 by restriction fragment length polymorphism using Shiga-like toxin genes. J Clin Microbiol. 1995 Aug.

1994 Publications

Kim HH, Samadpour M, Grimm L, Clausen CR, Besser TE, Baylor M, Kobayashi JM, Neill MA, Schoenknecht FD, Tarr PI. Characteristics of antibiotic-resistant Escherichia coli O157:H7 in Washington State, 1984-1991. J Infect Dis. 1994 Dec.

Samadpour M, Ongerth JE, Liston J, Tran N, Nguyen D, Whittam TS, Wilson RA, Tarr PI. Occurrence of Shiga-like toxin-producing Escherichia coli in retail fresh seafood, beef, lamb, pork, and poultry from grocery stores in Seattle, Washington. Appl Environ Microbiol. 1994 March.

1993 Publications

Samadpour M, Grimm LM, Desai B, Alfi D, Ongerth JE, Tarr PI. Molecular epidemiology of Escherichia coli O157:H7 strains by bacteriophage lambda restriction fragment length polymorphism analysis: application to a multistate foodborne outbreak and a day-care center cluster. J Clin Microbiol. 1993 Dec.

1992 Publications

Coyle MB, Carlson LC, Wallis CK, Leonard RB, Raisys VA, Kilburn JO, Samadpour M, Böttger EC. Laboratory aspects of “Mycobacterium genavense,” a proposed species isolated from AIDS patients. J Clin Microbiol. 1992 Dec.

Duguay SJ, Park LK, Samadpour M, Dickhoff WW. Nucleotide sequence and tissue distribution of three insulin-like growth factor I prohormones in salmon. Mol Endocrinol. 1992 Aug.

1991 Publications

Riley DE, Samadpour M, Krieger JN. Detection of variable DNA repeats in diverse eukaryotic microorganisms by a single set of polymerase chain reaction primers. J Clin Microbiol. 1991 Dec.

1990 Publications

Stibbs HH, Samadpour M, Ongerth JE. Identification of Giardia lamblia-specific antigens in infected human and gerbil feces by western immunoblotting. J Clin Microbiol. 1990 Oct.

Samadpour M, Liston J, Ongerth JE, Tarr PI. Evaluation of DNA probes for detection of Shiga-like-toxin-producing Escherichia coli in food and calf fecal samples. Appl Environ Microbiol. 1990 May.