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College of Veterinary Medicine

David G. Renter

 Professor, Epidemiology
Director, Center for Outcomes Research and Epidemiology

BS (1994), University of Nebraska at Kearney
DVM (1998), Kansas State University
PhD (2002), Kansas State University

Phone: (785)532-4801
Fax: (785)532-4851
Email: drenter@vet.ksu.edu

Research

My research emphasizes the application and extension of epidemiologic principles and methods to enhance animal health outcomes, food safety, and the sustainability of food animal production systems.  By utilizing appropriate experimental, observational, and synthesis research methods, my outcomes research enables valid data-driven decisions that improve animal health/well-being, food safety, production efficiency, and the economic viability of animal health and agricultural systems. My research is primarily focused on applying epidemiologic approaches to generate industry-relevant knowledge that is used to address complex and contemporary problems in beef cattle production systems.  Additional research interests include the development and application of methods for monitoring disease burden and validating diagnostic strategies; combining molecular and epidemiologic data for defining the epidemiology of infectious diseases; and the application of valid epidemiologic study design, implementation, and data interpretation for field-based research. 

Teaching

My primary teaching role is to further develop professional and graduate student training in epidemiology.  I help teach an introductory course on epidemiology in the first year of the professional veterinary curriculum (Veterinary Epidemiology), and have taught in three graduate courses – Intermediate Epidemiology, Advanced Epidemiology, and Applied Production Medicine.  I also deliver several guest lectures in other courses, and advise DVM, MPH, MS, and PhD students.

Selected Publications (Since 2012)

(†a graduate student or post-doctoral scientist as first author)

Noll L, Shridhar P, Ives S, Cha E, Nagaraja TG, Renter DG. Detection and quantification of seven major serogroups of Shiga toxin-producing Escherichia coli on hides of cull dairy, cull beef, and fed beef cattle at slaughter. J Food Prot. 2018; 81(8):1236-1244

Bello NM, Renter DG. Invited Review: Reproducible research from noisy data: revisiting key statistical principles for the animal sciences. J Dairy Sci. 2018; 101(7); 5679-5701

Dodd CC, Bechtol DT, Waite A, Corbin M, Renter DG. A randomized trial to compare the efficacy of tildipirosin and tulathromycin for initial treatment of bovine respiratory disease in naturally exposed commercial feedlot heifers. Bov Pract. 2018; 52(1): 39-45. 

Smith AB, Renter DG, Shi X, Cernicchiaro N, Sahin O, Nagaraja TG. Campylobacter prevalence and quinolone susceptibility in feces of preharvest feedlot cattle exposed to enrofloxacin for the treatment of bovine respiratory disease. Foodborne Pathog Dis. 2018; 15(6): 377-385

Bai J, Trinetta V, Shi X, Noll LW, Magossi G, Zheng W, Porter EP, Cernicchiaro N, Renter DG, Nagaraja TG. A multiplex real-time PCR assay, based on invA and pagC genes, for the detection and quantification of Salmonella enterica from cattle lymph nodes. J Microbiol Methods. 2018; 148:110-116

Dennis E, Schroeder T, Renter DG, Pendell D. Value of arrival metaphylaxis in U.S. fed cattle industry. J Agric Res Econ. 2018; 43(2): 233-250.

Cha E, Sanderson MW, Renter DG, Jager A, Cernicchiaro N, Bello NM. Implementing structural equation models to observational data from feedlot production systems. Prev Vet Med. 2017; 147:163-171.

Lubbers BV, Renter DG, Hesse RA, Peddireddi L, Zerse MT, Adams EA, Meyer BD. Prevalence of respiratory viruses and Mycoplasma bovis in U.S. cattle and variability among herds of origin, production systems and season of year. Bov Pract. 2017; 51(2):159-164.

Sturgess KL, Renter DG. Comparison of tulathromycin, tildipirosin, and tilmicosin for control of bovine respiratory disease in steers purchased from auction markers and fed in a Texas feedlot. Bov Pract2017; 51(1): 17-24. 

Ekong PS, Sanderson MW, Noll LW, Cernicchiaro N, Renter DG, Bello NM, Bai J, Nagaraja TG. Bayesian estimation of true prevalence, sensitivity and specificity of three diagnostic tests for detection of Escherichia coli O157 in cattle feces. Prev Vet Med. 2017; 148:21-27

Smith AB, Renter DG, Cernicchiaro N. Shi X, Nickell JS, Keil DJ, Nagaraja TG. A randomized trial to assess the effect of fluoroquinolone metaphylaxis on the fecal prevalence and quinolone susceptibilities of Salmonella and Campylobacter in feedlot cattle. Foodborne Pathog Dis. 2017; 14(10):600-607.

Shridhar PB, Noll LW, Cull C, Shi X, Cernicchiaro N, Renter DG, Bai J, Nagaraja TG. Spiral plating method to quantify the six major non-O157 Escherichia coli serogroups in cattle feces. J Food Prot. 2017; doi: 10.4315/0362-028X.JFP-16-360.

Cull CA, Renter DG, Dewsbury DM, Noll LW, Shridhar PB, Ives SE, Nagaraja TG, Cernicchiaro N. Feedlot- and pen-level prevalence of enterohemorrhagic Escherichia coli in feces of commercial feedlot cattle in two major U.S. cattle feeding areas. Foodborne Pathog Dis. 2017; 14(6):309-317. 

Rogers KC, Miles DG, Renter DG, Sears JE, Woodruff JL. Effects of delayed respiratory viral vaccine and/or inclusion of an immunostimulant on feedlot health, performance, and carcass merits of auction-market derived feeder heifers. Bov Pract. 2016; 50(2):154-162. 

Engelken TJ, Roth JA, Kimura K, Renter DG, Meyer BD, Burdett WW, Hill KL. The effect of respiratory vaccine components and route of delivery on weight gain and inflammatory response in suckling beef calves. Bov Pract. 2016; 50(2):165-172. 

Chen S, Sanderson MW, Lee C, Cernicchiaro N, Renter DG, Lanzas C. Basic reproduction number and transmission dynamics of common serogroups of enterohemorrhagic Escherichia coliAppl Environ Microbiol. 2016; 82(18):5612-20

Cernicchiaro N, Ives SE, Edrington TS, Nagaraja TG, Renter DG*. Efficacy of a Salmonella siderophore receptor protein vaccine on fecal shedding and lymph node carriage of Salmonella in commercial feedlot cattle. Foodborne Pathog Dis. 2016; 13(9): 517-525

DeMars Z, Biswas S, Amachawadi RR, Renter DG, Volkova VV.  Antimicrobial susceptibility of enteric Gram negative facultative anaerobe bacilli in aerobic versus anaerobic conditions. PLoS One. 2016; 11(5):e0155599

Shridhar PB, Noll LW, Shi X, Cernicchiaro N, Renter DG, Bai J, Nagaraja TG. Escherichia coli O104 in feedlot cattle feces: prevalence, isolation and characterization. PLoS One. 2016; 11(3):e0152101

Chopyk J, Moore RM, DiSpirito Z, Stromberg ZR, Lewis GL, Renter DG, Cernicchiaro N, Moxley RA, Wommack KE. Presence of pathogenic Escherichia coli is correlated with bacterial community diversity and composition on pre-harvest cattle hides. Microbiome. 2016; 4(1):9.  

Cernicchiaro N, Corbin M, Quinn M, Prouty F, Branine M, Renter DG*. Meta-analysis of the effects of laidlomycin propionate, fed alone or in combination with chlortetracycline, and monensin sodium, fed alone or in combination with tylosin, on growth performance, health, and carcass outcomes in finishing steers in North America. Anim Sci. 2016; 94(4):1662-76

Smith A, Renter DG*, Cernicchiaro N, Shi X, Nagaraja TG. Prevalence and quinolone-susceptibilities of Salmonella isolated from the feces of pre-harvest cattle within feedlots that use a fluoroquinolone to treat bovine respiratory disease. Foodborne Pathog Dis. 2016; 13(6):303-8.

Shridhar PB , Noll LW, Shi X, An B, Cernicchiaro N, Renter DG, Nagaraja TG, Bai J 2015. Multiplex quantitative PCR assay for the detection and quantification of the six major non-O157 Escherichia coli serogroups in cattle feces. J Food Prot. 2016; 79(1):66-74.

Noll LW , Baumgartner WC, Shridhar PB, Cull CA, Dewsbury D, Shi X, Cernicchiaro N, Renter DG, Nagaraja TG. 2015. Pooling of immunomagnetic separation beads does not affect detection sensitivity of six major serogroups of Shiga toxin-producing Escherichia coli in cattle feces. J Food Prot. 2016; 79(1):59-65.

Ison S, Delannoy S, Bugarel , Nagaraja TG, Renter DG, den Bakker H, Nightingale K, Fach P, Loneragan G. Targeted amplicon amplicon sequencing for SNP genotyping of attaching and effacing Escherichia coli O26:H11 cattle strains using a high-throughput library preparation technique. Appl Environ Microbiol. 2015; 82(2):640-9.

Theurer ME, Renter DG, White BJ. Using feedlot operational data to make valid conclusions for improving health management. Vet Clin North Am Food Anim Pract. 2015; 31(3):495-508.

Theurer ME, White BJ, Renter DG. Optimizing feedlot diagnostic testing strategies using test characteristics, disease prevalence, and relative costs of misdiagnosis. Vet Clin North Am Food Anim Pract. 2015; 31(3):483-93.

Noll LW , Shridhar PB, Shi X, An B, Cernicchiaro N, Renter DG, Nagaraja TG, Bai J. A four-plex real-time PCR assay, based on rfbE,stx1, stx2, and eae genes, for the detection and quantification of Shiga toxin-producing Escherichia coli O157 in cattle feces. Foodborne Pathog Dis. 2015; 12(9):787-794.

Noll LW , Shridhar PB, Dewsbury DM, Shi X, Cernicchiaro N, Renter DG, Nagaraja TG. A comparison of culture- and PCR-based methods to detect six major non-O157 serogroups of Shiga toxin-producing Escherichia coli in cattle feces. PLoS One. 2015; 10(8):e0135446.

Rogers KC, Miles DG, Hughes HD, Renter DG, Woodruff, J, Zuidhof S. Effect of initial respiratory viral-bacterial combination vaccine on performance, health, and carcass traits of auction-market derived feedlot heifers. Bovine Pr. 2015; 49(1): 43-47

Dewsbury DM , Renter DG, Shridhar PB, Noll LW, Shi X, Nagaraja TG, Cernicchiaro N. Summer and winter prevalence of Shiga toxin-producing Escherichia coli (STEC) O26, O45, O103, O111, O121, O145, and O157 in feces of feedlot cattle. Foodborne Pathog Dis. 2015; (8):726-732.

Stromberg ZR, Baumann N, Lewis GL, Cernicchiaro N, Renter DG, Marx DB, Phebus RK, Moxley RA 2015. Prevalence of enterohemorrhagic Escherichia coli O26, O45, O103, O111, O121, O145, and O157 on hides and carcass surfaces of beef feedlot cattle at harvest. Foodborne Pathog Dis. 2015; 12(7): 631-638.

Cull CA, Renter DG*, Bello NB, Ives SE, Babcock AH. Performance and carcass characteristics of commercial feedlot cattle from a study of vaccine and direct-fed microbial effects on E. coli O157:H7 fecal shedding. J An Sci. 2015; 93(6): 3144-3151.

Ison S, Delannoy S, Bugarel M, Nightingale K, Webb H, Renter DG, Nagaraja TG, Loneragan G, Fach P. Genetic diversity and pathogenic potential of attaching and effacing Escherichia coli (AEEC) O26:H11 recovered from bovine feces in the United States. Appl Environ Microbiol. 2015; 81(11): 3671-3678.

Agga G, Scott HM, Vinasco J, Nagaraja TG, Amachawadi R,Bai J, Norby B, Renter DG, Dritz S, Nelssen J, Tokach M.  Effects of chlortetracycline and copper supplementation on the prevalence, distribution, and quantity of antimicrobial resistance genes in the feces of weaned pigs. Prev Vet Med. 2015; 119(3-4):179-189.

Tennant T, Ives S, Harper LB, Renter DG, Lawrence T. Comparison of Tulathromycin and Tilmicosin on the prevalence and severity of bovine respiratory disease in feedlot cattle in association with feedlot performance, carcass characteristics, and economic factors.  J Anim Sci. 2014; 92: 5203-5213.

Agga G, Scott HM, Amachawadi R, Nagaraja TG, Vinasco J, Bai J, Norby B, Renter DG, Dritz S, Nelssen J, Tokach M. Effects of chlortetracycline and copper supplementation on antimicrobial resistance of fecal Escherichia coli from weaned pigs. Prev Vet Med. 2014; 114(3–4): 231–246

Cernicchiaro N, Renter DG, Cull CA, Paddock ZD, Shi X, Nagaraja TG. Fecal shedding of non-O157 serogroups of Shiga toxin-producing Escherichia coli in feedlot cattle vaccinated with an E. coli O157:H7 SRP® vaccine and fed a Lactobacillus-based direct-fed microbial   J Food Prot. 2014; 5: 732-737.

Paddock ZD, Renter DG, Cull CA, Paddock ZD, Bai J, Nagaraja TG.  Escherichia coli O26 in feedlot cattle: fecal prevalence, isolation, characterization and effects of an E. coli O157 vaccine and a direct-fed microbial.  Foodborne Pathog Dis. 2014; 11(3): 186-193.

Smith R, Sanderson MW, Jones R, Renter DG, Larson RL. Economic risk analysis model for Bovine Viral Diarrhea Virus biosecurity in cow-calf herds. Prev Vet Med. 2014; 113(4): 492-503.

Jacob M, Bai J, Renter DG, Rogers A, Shi X, Nagaraja TG. Comparing real-time and conventional PCR to culture-based methods for detecting and quantifying Escherichia coli O157 in cattle feces.  J Food Prot. 2014; 77(2): 314-319.

Cernicchiaro N, Cull CA, Paddock ZD, Shi X, Bai J, Nagaraja TG, Renter DG.  Prevalence of Shiga toxin-producing Escherichia coli and associated virulence genes in feces of commercial feedlot cattle.  Foodborne Pathog Dis. 2013; 10(10): 835-841.

Wang H, Rush B, Wilkerson M, Herman C, Miesner M, Renter DG, Gehring R. From Theory to Practice: Integrating instructional technology into veterinary medical education.  J  Vet Med Edu. 2013; 40(3): 264-271.

Cernicchiaro N, Renter DG, Xiang S, White BJ, Bello NM. Hierarchical Bayesian modeling of heterogeneous variances in average daily weight gain of commercial feedlot cattle.  J Anim Sci. 2013; 91(6): 2910-2919.

Paddock ZD, Bai J, Shi X, Renter DG, Nagaraja TG.Detection of Escherichia coli O104 in the feces of feedlot cattle by a multiplex PCR assay designed to target major genetic traits of the virulent hybrid strain responsible for the 2011 German outbreak. Appl Environ Microbiol. 2013; 79(11): 3522-3525.

Paddock ZD, Renter DG, Shi X, Krehbiel C, DeBey B, Nagaraja TG. Effects of feeding dried distiller’s grains with supplemental starch on fecal shedding of Escherichia coli O157:H7 in experimentally-inoculated steers.  J Anim Sci. 2013; 91(3): 1362-1370.

Hanzlicek G, Renter DG, White BJ, Wagner BA, Dargatz DA, Sanderson MW, Scott HM, Larson RE. Management practices associated with the rate of respiratory tract disease among preweaned beef calves in cow-calf operations in the United States. J Am Vet Med Assoc. 2013; 242(9): 1271-1278.

Cernicchiaro N, White BJ, Renter DG,Babcock AH. Evaluation of economic and performance outcomes associated with the number of treatments after an initial diagnosis of bovine respiratory disease in commercial feeder cattle. Am J Vet Res. 2013; 74(2): 300-309.

Babcock AH, White BJ, Renter DG, Dubnicka S, Scott HM.  Predicting cumulative risk of bovine respiratory disease complex (BRDC) using feedlot arrival data and daily morbidity and mortality counts. Can J Vet Res. 2013; 77(1): 33-44.

Pauly C, White BJ, Coetzee J, Robért B, Baldridge S, Renter DG.  Evaluation of analgesic protocol effect on calf behavior after concurrent castration and dehorning.  Inter J App Res Vet Med.2012; 10(1): 54-61.

Babcock AH, Cernicchiaro N, White BJ, Dubnicka S, Thomson D, Ives S, Scott HM, Milliken G, Renter DG.  Quantifying the effects of common risk factors for mortality and culling risk in feedlot cattle populations using a mixed effects count model.  Prev Vet Med. 2012; 108(1): 38-46.

Cull CA, Paddock ZD, Nagaraja TG, Bello NB, Babcock AH, Renter DG. Efficacy of a vaccine and a direct-fed microbial against fecal shedding of Escherichia coli O157:H7 in a randomized pen-level field trial of commercial feedlot cattle. Vaccine 2012; 30(43): 6210-6205

White BJ, Anderson D, Renter DG, Larson R, Mosier D, Kelly L, Theurer M, Robért B, Walz M. Clinical, behavioral, and pulmonary changes following Mycoplasma bovis challenge in calves. Am J Vet Res. 2012; 73(4):490-497.

Cernicchiaro N†, White BJ,  Renter DG, Babcock AH, Kelly L, Slattery R. Associations between the distance traveled from sale barns to commercial feedlots in the United States and overall performance, risk of respiratory disease, and cumulative mortality in feeder cattle during 1997 to 2009.  J Anim Sci. 2012; 90(6):1929-1939.

Cernicchiaro N†, White BJ,  Renter DG, Babcock AH, Kelly L, Slattery R. Effects of weight loss during transit from sale barns to commercial feedlots on health and performance in feeder cattle cohorts arriving to feedlots from 2000 to 2008. J Anim Sci. 2012; 90(6):1940-1947.

Cernicchiaro N†, Renter DG, White BJ, Babcock AH, Fox JT.  Associations between weather conditions during the first 45 days following feedlot arrival and daily respiratory disease risks in autumn-placed U.S. feeder cattle.  J Anim Sci. 2012;90(4):1328-1337

Pauly C†, White BJ, Coetzee J, Robért B, Baldridge S, Renter DG.  Evaluation of analgesic protocol effect on calf behavior after concurrent castration and dehorning.   .  Inter J App Res Vet Med 2012; 10(1):54-61.