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Critically important antibiotics: criteria and approaches for measuring and reducing their use in food animal agriculture.

Scott HM, Acuff G, Bergeron G, Bourassa MW, Gill J, Graham DW, Kahn LH, Morley PS, Salois MJ, Simjee S, Singer RS, Smith TC, Storrs C, Wittum TE.

Ann N Y Acad Sci. 2019 Apr;1441(1):8-16. doi: 10.1111/nyas.14058. Review.


Complexities in understanding antimicrobial resistance across domesticated animal, human, and environmental systems.

Graham DW, Bergeron G, Bourassa MW, Dickson J, Gomes F, Howe A, Kahn LH, Morley PS, Scott HM, Simjee S, Singer RS, Smith TC, Storrs C, Wittum TE.

Ann N Y Acad Sci. 2019 Apr;1441(1):17-30. doi: 10.1111/nyas.14036. Review.


Salmonella Prevalence and Antimicrobial Drug Resistance in Dual-Purpose Cattle Operations in the Eastern Region of Zulia State, Venezuela.

Fuenmayor Y, Rodas-González A, Carruyo G, Hoet AE, Wittum T, Narváez-Bravo C.

Foodborne Pathog Dis. 2019 Mar;16(3):205-213. doi: 10.1089/fpd.2018.2515. Epub 2018 Nov 27.


Barriers and next steps to providing a spectrum of effective health care to companion animals.

Stull JW, Shelby JA, Bonnett BN, Block G, Budsberg SC, Dean RS, Dicks MR, Forsgren BW, Golab GC, Hamil JA, Kass PH, King LJ, Lund EM, Maddux ML, McFarland JM, McKenzie BA, Moyer MR, Olson PN, Wittum TE.

J Am Vet Med Assoc. 2018 Dec 1;253(11):1386-1389. doi: 10.2460/javma.253.11.1386. No abstract available.


Enterobacter cloacae Complex Sequence Type 171 Isolates Expressing KPC-4 Carbapenemase Recovered from Canine Patients in Ohio.

Daniels JB, Chen L, Grooters SV, Mollenkopf DF, Mathys DA, Pancholi P, Kreiswirth BN, Wittum TE.

Antimicrob Agents Chemother. 2018 Nov 26;62(12). pii: e01161-18. doi: 10.1128/AAC.01161-18. Print 2018 Dec.


Risk of anesthesia-related complications in brachycephalic dogs.

Gruenheid M, Aarnes TK, McLoughlin MA, Simpson EM, Mathys DA, Mollenkopf DF, Wittum TE.

J Am Vet Med Assoc. 2018 Aug 1;253(3):301-306. doi: 10.2460/javma.253.3.301.


β-Lactam and Fluoroquinolone-Resistant Enterobacteriaceae Recovered from the Environment of Human and Veterinary Tertiary Care Hospitals.

Mathys DA, Mollenkopf DF, Van Balen JC, Wittum TE.

Vector Borne Zoonotic Dis. 2018 Nov;18(11):620-623. doi: 10.1089/vbz.2018.2320. Epub 2018 Jul 13.


Comparative health assessment of urban and non-urban free-ranging mule deer (Odocoileus hemionus) in southeastern British Columbia, Canada.

Mathieu A, Flint M, Stent PM, Schwantje HM, Wittum TE.

PeerJ. 2018 Jun 20;6:e4968. doi: 10.7717/peerj.4968. eCollection 2018.


Salmonella spp. and Extended-Spectrum Cephalosporin-Resistant Escherichia coli Frequently Contaminate Broiler Chicken Transport Cages of an Organic Production Company.

Mollenkopf DF, De Wolf B, Feicht SM, Cenera JK, King CA, van Balen JC, Wittum TE.

Foodborne Pathog Dis. 2018 Sep;15(9):583-588. doi: 10.1089/fpd.2017.2390. Epub 2018 Jun 6.


Maintenance of Carbapenemase-Producing Enterobacteriaceae in a Farrow-to-Finish Swine Production System.

Mollenkopf DF, Mathys DA, Feicht SM, Stull JW, Bowman AS, Daniels JB, Wittum TE.

Foodborne Pathog Dis. 2018 Jun;15(6):372-376. doi: 10.1089/fpd.2017.2355. Epub 2018 Mar 15.


Antimicrobial-resistant Enterobacteriaceae recovered from companion animal and livestock environments.

Adams RJ, Kim SS, Mollenkopf DF, Mathys DA, Schuenemann GM, Daniels JB, Wittum TE.

Zoonoses Public Health. 2018 Aug;65(5):519-527. doi: 10.1111/zph.12462. Epub 2018 Mar 25.


Effect of Continuous Digital Hypothermia on Lamellar Inflammatory Signaling When Applied at a Clinically-Relevant Timepoint in the Oligofructose Laminitis Model.

Dern K, van Eps A, Wittum T, Watts M, Pollitt C, Belknap J.

J Vet Intern Med. 2018 Jan;32(1):450-458. doi: 10.1111/jvim.15027. Epub 2017 Dec 27.


Associations of patient characteristics, disease stage, and biopsy technique with the diagnostic quality of core needle renal biopsy specimens from dogs with suspected kidney disease.

Crivellenti LZ, Cianciolo R, Wittum T, Lees GE, Adin CA.

J Am Vet Med Assoc. 2018 Jan 1;252(1):67-74. doi: 10.2460/javma.252.1.67.


Genotypic and epidemiologic characterization of extended-spectrum cephalosporin resistant Salmonella enterica from US beef feedlots.

Mollenkopf DF, Mathys DA, Dargatz DA, Erdman MM, Habing GG, Daniels JB, Wittum TE.

Prev Vet Med. 2017 Oct 1;146:143-149. doi: 10.1016/j.prevetmed.2017.08.006. Epub 2017 Aug 12.


Interobserver Variation in the Diagnosis of Neurologic Abnormalities in the Horse.

Saville WJA, Reed SM, Dubey JP, Granstrom DE, Morley PS, Hinchcliff KW, Kohn CW, Wittum TE, Workman JD.

J Vet Intern Med. 2017 Nov;31(6):1871-1876. doi: 10.1111/jvim.14822. Epub 2017 Sep 9.


Dogs on livestock farms: A cross-sectional study investigating potential roles in zoonotic pathogen transmission.

Moran NE, Ferketich AK, Wittum TE, Stull JW.

Zoonoses Public Health. 2018 Feb;65(1):80-87. doi: 10.1111/zph.12373. Epub 2017 Jul 5.


A Syst-OMICS Approach to Ensuring Food Safety and Reducing the Economic Burden of Salmonellosis.

Emond-Rheault JG, Jeukens J, Freschi L, Kukavica-Ibrulj I, Boyle B, Dupont MJ, Colavecchio A, Barrere V, Cadieux B, Arya G, Bekal S, Berry C, Burnett E, Cavestri C, Chapin TK, Crouse A, Daigle F, Danyluk MD, Delaquis P, Dewar K, Doualla-Bell F, Fliss I, Fong K, Fournier E, Franz E, Garduno R, Gill A, Gruenheid S, Harris L, Huang CB, Huang H, Johnson R, Joly Y, Kerhoas M, Kong N, Lapointe G, Larivière L, Loignon S, Malo D, Moineau S, Mottawea W, Mukhopadhyay K, Nadon C, Nash J, Ngueng Feze I, Ogunremi D, Perets A, Pilar AV, Reimer AR, Robertson J, Rohde J, Sanderson KE, Song L, Stephan R, Tamber S, Thomassin P, Tremblay D, Usongo V, Vincent C, Wang S, Weadge JT, Wiedmann M, Wijnands L, Wilson ED, Wittum T, Yoshida C, Youfsi K, Zhu L, Weimer BC, Goodridge L, Levesque RC.

Front Microbiol. 2017 Jun 2;8:996. doi: 10.3389/fmicb.2017.00996. eCollection 2017.


Extended-Spectrum Cephalosporin-Resistant Enterobacteriaceae in Enteric Microflora of Wild Ducks.

Mathys DA, Mollenkopf DF, Nolting J, Bowman AS, Daniels JB, Wittum TE.

J Wildl Dis. 2017 Jul;53(3):690-694. doi: 10.7589/2016-12-272. Epub 2017 Apr 6.


Carbapenemase-Producing Aeromonas veronii Disseminated in the Environment of an Equine Specialty Hospital.

Adams RJ, Mathys DA, Mollenkopf DF, Whittle A, Daniels JB, Wittum TE.

Vector Borne Zoonotic Dis. 2017 Jun;17(6):439-442. doi: 10.1089/vbz.2016.2083. Epub 2017 Mar 27.


Prevalence of AmpC- and Extended-Spectrum β-Lactamase-Harbouring Enterobacteriaceae in Faecal Flora of a Healthy Domestic Canine Population.

Mathys DA, Mollenkopf DF, Bremer CA, Daniels JB, Wittum TE.

Zoonoses Public Health. 2017 Nov;64(7):554-560. doi: 10.1111/zph.12341. Epub 2017 Feb 20.


Enterobacteriaceae Harboring AmpC (blaCMY) and ESBL (blaCTX-M) in Migratory and Nonmigratory Wild Songbird Populations on Ohio Dairies.

Mathys DA, Mathys BA, Mollenkopf DF, Daniels JB, Wittum TE.

Vector Borne Zoonotic Dis. 2017 Apr;17(4):254-259. doi: 10.1089/vbz.2016.2038. Epub 2017 Feb 6.


Carbapenemase-Producing Enterobacteriaceae Recovered from the Environment of a Swine Farrow-to-Finish Operation in the United States.

Mollenkopf DF, Stull JW, Mathys DA, Bowman AS, Feicht SM, Grooters SV, Daniels JB, Wittum TE.

Antimicrob Agents Chemother. 2017 Jan 24;61(2). pii: e01298-16. doi: 10.1128/AAC.01298-16. Print 2017 Feb.


Extended-Spectrum β-lactam Resistance in the Enteric Flora of Patients at a Tertiary Care Medical Centre.

Landers TF, Mollenkopf DF, Faubel RL, Dent A, Pancholi P, Daniels JB, Wittum TE.

Zoonoses Public Health. 2017 Mar;64(2):161-164. doi: 10.1111/zph.12293. Epub 2016 Aug 3.


Surveillance and characterization of carbapenemase-producing Klebsiella pneumoniae recovered from patient stool samples at a tertiary care medical center.

Mollenkopf DF, Faubel RL, Pancholi P, Landers TF, Erdman MM, Daniels JB, Wittum TE.

Antimicrob Agents Chemother. 2015 Sep;59(9):5857-9. doi: 10.1128/AAC.01085-15. Epub 2015 Jun 22. No abstract available.


Comparison of tibial plateau angles in small and large breed dogs.

Su L, Townsend KL, Au J, Wittum TE.

Can Vet J. 2015 Jun;56(6):610-4.


Organic or antibiotic-free labeling does not impact the recovery of enteric pathogens and antimicrobial-resistant Escherichia coli from fresh retail chicken.

Mollenkopf DF, Cenera JK, Bryant EM, King CA, Kashoma I, Kumar A, Funk JA, Rajashekara G, Wittum TE.

Foodborne Pathog Dis. 2014 Dec;11(12):920-9. doi: 10.1089/fpd.2014.1808.


The global one health paradigm: challenges and opportunities for tackling infectious diseases at the human, animal, and environment interface in low-resource settings.

Gebreyes WA, Dupouy-Camet J, Newport MJ, Oliveira CJ, Schlesinger LS, Saif YM, Kariuki S, Saif LJ, Saville W, Wittum T, Hoet A, Quessy S, Kazwala R, Tekola B, Shryock T, Bisesi M, Patchanee P, Boonmar S, King LJ.

PLoS Negl Trop Dis. 2014 Nov 13;8(11):e3257. doi: 10.1371/journal.pntd.0003257. eCollection 2014. Review.


Distribution and Diversity of Salmonella Strains in Shipments of Hatchling Poultry, United States, 2013.

Habing GG, Kessler SE, Mollenkopf DF, Wittum TE, Anderson TC, Barton Behravesh C, Joseph LA, Erdman MM.

Zoonoses Public Health. 2015 Aug;62(5):375-80. doi: 10.1111/zph.12157. Epub 2014 Sep 18.


Comparative phenotypic and genotypic analyses of Salmonella Rissen that originated from food animals in Thailand and United States.

Pornsukarom S, Patchanee P, Erdman M, Cray PF, Wittum T, Lee J, Gebreyes WA.

Zoonoses Public Health. 2015 Mar;62(2):151-8. doi: 10.1111/zph.12144. Epub 2014 Jun 16.


Epidemiological profiling of methicillin-resistant Staphylococcus aureus-positive dogs arriving at a veterinary teaching hospital.

Hoet AE, van Balen J, Nava-Hoet RC, Bateman S, Hillier A, Dyce J, Wittum TE.

Vector Borne Zoonotic Dis. 2013 Jun;13(6):385-93. doi: 10.1089/vbz.2012.1089. Epub 2013 Mar 8.


Presence, distribution, and molecular epidemiology of methicillin-resistant Staphylococcus aureus in a small animal teaching hospital: a year-long active surveillance targeting dogs and their environment.

van Balen J, Kelley C, Nava-Hoet RC, Bateman S, Hillier A, Dyce J, Wittum TE, Hoet AE.

Vector Borne Zoonotic Dis. 2013 May;13(5):299-311. doi: 10.1089/vbz.2012.1142. Epub 2013 Mar 8.


Yersinia enterocolitica of porcine origin: carriage of virulence genes and genotypic diversity.

Tadesse DA, Bahnson PB, Funk JA, Morrow WE, Abley MJ, Ponte VA, Thakur S, Wittum T, DeGraves FJ, Rajala-Schultz PJ, Gebreyes WA.

Foodborne Pathog Dis. 2013 Jan;10(1):80-6. doi: 10.1089/fpd.2011.1120.


Escherichia coli and Klebsiella pneumoniae producing CTX-M cephalosporinase from swine finishing barns and their association with antimicrobial use.

Mollenkopf DF, Mirecki JM, Daniels JB, Funk JA, Henry SC, Hansen GE, Davies PR, Donovan TS, Wittum TE.

Appl Environ Microbiol. 2013 Feb;79(3):1052-4. doi: 10.1128/AEM.03169-12. Epub 2012 Nov 30.


The challenge of regulating agricultural ceftiofur use to slow the emergence of resistance to extended-spectrum cephalosporins.

Wittum TE.

Appl Environ Microbiol. 2012 Nov;78(22):7819-21. doi: 10.1128/AEM.01967-12. Epub 2012 Sep 7. No abstract available.


Detection of Salmonella enterica isolates producing CTX-M Cephalosporinase in U.S. livestock populations.

Wittum TE, Mollenkopf DF, Erdman MM.

Appl Environ Microbiol. 2012 Oct;78(20):7487-91. Epub 2012 Aug 10.


Antimicrobial susceptibility, pulsed-field gel electrophoresis, and multi-locus sequence typing of Campylobacter coli in swine before, during, and after the slaughter process.

Abley MJ, Wittum TE, Funk JA, Gebreyes WA.

Foodborne Pathog Dis. 2012 Jun;9(6):506-12. doi: 10.1089/fpd.2011.1053.


Variable within- and between-herd diversity of CTX-M cephalosporinase-bearing Escherichia coli isolates from dairy cattle.

Mollenkopf DF, Weeman MF, Daniels JB, Abley MJ, Mathews JL, Gebreyes WA, Wittum TE.

Appl Environ Microbiol. 2012 Jul;78(13):4552-60. doi: 10.1128/AEM.00373-12. Epub 2012 Apr 27.


Characteristics of dairy calf ranches: morbidity, mortality, antibiotic use practices, and biosecurity and biocontainment practices.

Walker WL, Epperson WB, Wittum TE, Lord LK, Rajala-Schultz PJ, Lakritz J.

J Dairy Sci. 2012 Apr;95(4):2204-14. doi: 10.3168/jds.2011-4727.


A review of antibiotic use in food animals: perspective, policy, and potential.

Landers TF, Cohen B, Wittum TE, Larson EL.

Public Health Rep. 2012 Jan-Feb;127(1):4-22. Review.


Quantification of campylobacter in swine before, during, and after the slaughter process.

Abley MJ, Wittum TE, Moeller SJ, Zerby HN, Funk JA.

J Food Prot. 2012 Jan;75(1):139-43. doi: 10.4315/0362-028X.JFP-11-334.


Quantification of Campylobacter and Salmonella in cattle before, during, and after the slaughter process.

Abley MJ, Wittum TE, Zerby HN, Funk JA.

Foodborne Pathog Dis. 2012 Feb;9(2):113-9. doi: 10.1089/fpd.2011.0931. Epub 2011 Nov 1.


Ceftiofur use in finishing swine barns and the recovery of fecal Escherichia coli or Salmonella spp. resistant to ceftriaxone.

Lutz EA, McCarty MJ, Mollenkopf DF, Funk JA, Gebreyes WA, Wittum TE.

Foodborne Pathog Dis. 2011 Nov;8(11):1229-34. doi: 10.1089/fpd.2011.0925. Epub 2011 Aug 5.


Characterization of advertisements for puppies sold online: determinants of cost and a comparison with parent club breeders.

Voris HC, Wittum TE, Rajala-Schultz PJ, Lord LK.

Prev Vet Med. 2011 Jul 1;100(3-4):200-9. doi: 10.1016/j.prevetmed.2011.03.016. Epub 2011 May 13.


Environmental methicillin-resistant Staphylococcus aureus in a veterinary teaching hospital during a nonoutbreak period.

Hoet AE, Johnson A, Nava-Hoet RC, Bateman S, Hillier A, Dyce J, Gebreyes WA, Wittum TE.

Vector Borne Zoonotic Dis. 2011 Jun;11(6):609-15. doi: 10.1089/vbz.2010.0181. Epub 2011 Mar 21.


Prevalence and antimicrobial resistance profile of Campylobacter spp. isolated from conventional and antimicrobial-free swine production systems from different U.S. regions.

Tadesse DA, Bahnson PB, Funk JA, Thakur S, Morrow WE, Wittum T, DeGraves F, Rajala-Schultz P, Gebreyes WA.

Foodborne Pathog Dis. 2011 Mar;8(3):367-74. doi: 10.1089/fpd.2010.0665. Epub 2010 Dec 6.


Effects of restricted antimicrobial exposure on antimicrobial resistance in fecal Escherichia coli from feedlot cattle.

Morley PS, Dargatz DA, Hyatt DR, Dewell GA, Patterson JG, Burgess BA, Wittum TE.

Foodborne Pathog Dis. 2011 Jan;8(1):87-98. doi: 10.1089/fpd.2010.0632. Epub 2010 Oct 30.


Salmonella enterica and Escherichia coli harboring blaCMY in retail beef and pork products.

Mollenkopf DF, Kleinhenz KE, Funk JA, Gebreyes WA, Wittum TE.

Foodborne Pathog Dis. 2011 Feb;8(2):333-6. doi: 10.1089/fpd.2010.0701. Epub 2010 Oct 29.


CTX-M-type extended-spectrum β-lactamases present in Escherichia coli from the feces of cattle in Ohio, United States.

Wittum TE, Mollenkopf DF, Daniels JB, Parkinson AE, Mathews JL, Fry PR, Abley MJ, Gebreyes WA.

Foodborne Pathog Dis. 2010 Dec;7(12):1575-9. doi: 10.1089/fpd.2010.0615. Epub 2010 Aug 14.


Association of dry cow therapy with the antimicrobial susceptibility of fecal coliform bacteria in dairy cows.

Mollenkopf DF, Glendening C, Wittum TE, Funk JA, Tragesser LA, Morley PS.

Prev Vet Med. 2010 Aug 1;96(1-2):30-5. doi: 10.1016/j.prevetmed.2010.05.014. Epub 2010 Jun 22.


Swab type, moistening, and preenrichment for Staphylococcus aureus on environmental surfaces.

Landers TF, Hoet A, Wittum TE.

J Clin Microbiol. 2010 Jun;48(6):2235-6. doi: 10.1128/JCM.01958-09. Epub 2010 Apr 14.

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