World's Best Scientists 2026 revealed!
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Animal Science and Veterinary
USA
2023

D-Index & Metrics

Microbiology

D-Index
67
Citations
13988
World Ranking
2301
National Ranking
946

Animal Science and Veterinary

D-Index
67
Citations
14615
World Ranking
213
National Ranking
69

Todd R. Callaway publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where Todd R. Callaway sits on this spectrum.

29–33 publications: 1 scientists 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29 publications 442+

This scientist: 326 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

Todd R. Callaway D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where Todd R. Callaway sits on this spectrum.

20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 67 D-Index — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

Research.com Recognitions

  • 2023 - Research.com Animal Science and Veterinary in United States Leader Award
  • 2007 - Early Career Achievement Award, American Society of Animal Science

Overview

Todd R. Callaway is affiliated with the University of Georgia in the United States. Their research primarily focuses on agricultural and biological sciences, with notable contributions across several subfields including agronomy and crop science, animal science and zoology, molecular biology, food science, and infectious diseases.

The scientist has contributed to the understanding of ruminant nutrition and digestive physiology, gut microbiota and health, animal nutrition and physiology, as well as epidemiology related to Salmonella and Campylobacter and viral gastroenteritis. Probiotics and fermented foods and genetic and phenotypic traits in livestock also feature among their topical areas of study.

Todd R. Callaway's recent publications include:

  • "Probiotics and potential applications for alternative poultry production systems" (2021, Poultry Science)
  • "Alternatives to Antibiotics: A Symposium on the Challenges and Solutions for Animal Health and Production" (2021, Antibiotics)
  • "Comparison of the ruminal and fecal microbiotas in beef calves supplemented or not with concentrate" (2020, PLoS ONE)
  • "An overview of health challenges in alternative poultry production systems" (2021, Poultry Science)
  • "The relationship between the rumen microbiome and carcass merit in Angus steers" (2020, Journal of Animal Science)

They have collaborated frequently with coauthors such as Jeferson M. Lourenço, Christina B. Welch, Nicolae Corcionivoschi, Darren S. Seidel, and Igori Balta.

Callaway's work has appeared predominantly in the Journal of Animal Science, with a total of 18 publications, followed by contributions to Microorganisms, Journal of Dairy Science, Scientific Reports, and Poultry Science.

In 2007, Todd R. Callaway received the Early Career Achievement Award from the American Society of Animal Science.

Best Publications

  • Evaluation of the bacterial diversity in the feces of cattle using 16S rDNA bacterial tag-encoded FLX amplicon pyrosequencing (bTEFAP)

    Scot E. Dowd;Todd R. Callaway;Randall D Wolcott;Yan-Yan Sun

  • Grain Feeding and the Dissemination of Acid-Resistant Escherichia coli from Cattle

    Francisco Diez-Gonzalez;Todd R. Callaway;Menas G. Kizoulis;James B. Russell

  • Probiotics, prebiotics and competitive exclusion for prophylaxis against bacterial disease.

    T. R. Callaway;T. S. Edrington;R. C. Anderson;R. B. Harvey

  • Effect of Lactic Acid Administration in the Drinking Water During Preslaughter Feed Withdrawal on Salmonella and Campylobacter Contamination of Broilers

    J. A. Byrd;B. M. Hargis;D. J. Caldwell;R. H. Bailey

  • Ionophores: Their Use as Ruminant Growth Promotants and Impact on Food Safety

    T. R. Callaway;T. S. Edrington;J. L. Rychlik;T. L. Poole

  • Diet, Escherichia coli O157:H7, and cattle: a review after 10 years.

    Todd R. Callaway;M. A. Carr;T. S. Edrington;Robin C. Anderson

  • Evaluation of bacterial diversity in the rumen and feces of cattle fed different levels of dried distillers grains plus solubles using bacterial tag-encoded FLX amplicon pyrosequencing.

    T. R. Callaway;S. E. Dowd;T. S. Edrington;R. C. Anderson

  • Gastrointestinal microbial ecology and the safety of our food supply as related to Salmonella.

    T. R. Callaway;T. S. Edrington;R. C. Anderson;J. A. Byrd

  • Effects of organic acid and monensin treatment on in vitro mixed ruminal microorganism fermentation of cracked corn

    T R Callaway;S A Martin

  • Forage Feeding to Reduce Preharvest Escherichia coli Populations in Cattle, a Review

    T.R. Callaway;R.O. Elder;J.E. Keen;R.C. Anderson

  • Foodborne Salmonella ecology in the avian gastrointestinal tract

    K.D. Dunkley;T.R. Callaway;V.I. Chalova;J.L. McReynolds

  • Isolation and Characterization of a New T-Even Bacteriophage, CEV1, and Determination of Its Potential To Reduce Escherichia coli O157:H7 Levels in Sheep

    Raul Ricardo Raya;Raul Ricardo Raya;Peter Varey;Rebecca A. Oot;Michael R. Dyen

  • Probiotic alternatives to reduce gastrointestinal infections: the poultry experience.

    G. M. Nava;L. R. Bielke;T. R. Callaway;M. P Castañeda

  • Board-invited review: Rumen microbiology: leading the way in microbial ecology.

    D. O. Krause;T. G. Nagaraja;A. D. G. Wright;T. R. Callaway

  • The effect of nisin and monensin on ruminal fermentations In vitro.

    Callaway Tr;Carneiro De Melo Am;Russell Jb

  • Bacteriophage isolated from feedlot cattle can reduce Escherichia coli O157:H7 populations in ruminant gastrointestinal tracts.

    Todd R. Callaway;Tom S. Edrington;Andrew D. Brabban;Robin C. Anderson

  • A Review of the Effect of Management Practices on Campylobacter Prevalence in Poultry Farms.

    Nompilo Sibanda;Aaron McKenna;Anne Richmond;Steven C. Ricke

  • Sodium chlorate supplementation reduces E. coli O157:H7 populations in cattle

    T R Callaway;R C Anderson;K J Genovese;T L Poole

  • Evolution of foodborne pathogens via temperate bacteriophage-mediated gene transfer

    A.D. Brabban;E. Hite;T.R. Callaway

  • What are we doing about Escherichia coli O157:H7 in cattle?

    T. R. Callaway;R. C. Anderson;T. S. Edrington;K. J. Genovese

  • Comparison of In Vitro Fermentation and Molecular Microbial Profiles of High-Fiber Feed Substrates Incubated with Chicken Cecal Inocula

    K. D. Dunkley;C. S. Dunkley;N. L. Njongmeta;T. R. Callaway

  • Seasonal shedding of Escherichia coli O157:H7 in ruminants: a new hypothesis.

    Tom S. Edrington;Todd R. Callaway;Sam E. Ives;Mike J. Engler

Frequent Co-Authors

David J. Nisbet
David J. Nisbet United States Department of Agriculture
Robin C. Anderson
Robin C. Anderson United States Department of Agriculture
Tom S. Edrington
Tom S. Edrington Diamond V (United States)
Roger B. Harvey
Roger B. Harvey United States Department of Agriculture
James A. Byrd
James A. Byrd Agricultural Research Service
Luis O. Tedeschi
Luis O. Tedeschi Texas A&M University
Steven C. Ricke
Steven C. Ricke University of Wisconsin–Madison
Gordon E. Carstens
Gordon E. Carstens Texas A&M University
Scot E. Dowd
Scot E. Dowd MR DNA (Molecular Research LP)
Leon F. Kubena
Leon F. Kubena Agricultural Research Service

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Related Online Degrees & Career Pathways

For students interested in Animal Science and Veterinary fields, exploring related online degrees can broaden career opportunities. Many professionals pursue credentials such as the bcaba accredited programs to specialize in behavior analysis, which can complement animal training and welfare roles.

In addition, disciplines like psychology offer valuable insights into behavior and development. For those focusing on educational settings, online school psychology programs nasp approved provide flexible pathways to gain clinical skills essential for working with children and adolescents.

Advanced mental health training is also accessible through online apa accredited psyd programs, which prepare graduates for professional practice in psychology and counseling. These skills can be highly beneficial when addressing animal-assisted therapy and community health concerns.

Furthermore, careers in support and rehabilitation are growing, making an online substance abuse counseling degree a valuable qualification. Such programs equip students to provide counseling services, which can intersect with veterinary social work and animal welfare advocacy.

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