James Keen, DVM, PhD

  • 3177 Citations
  • 32 h-Index
1990 …2018

Research output per year

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Research Output

  • 3177 Citations
  • 32 h-Index
  • 61 Article
  • 2 Letter
  • 1 Comment/debate
  • 1 Review article
2018

Utilization of Computer-Aided Detection for Digital Screening Mammography in the United States, 2008 to 2016

Keen, J. D., Keen, J. M. & Keen, J. E., Jan 2018, In : Journal of the American College of Radiology. 15, 1, p. 44-48 5 p.

Research output: Contribution to journalArticle

12 Scopus citations
2017

Relative utility or marginal positive predictive values accounting for overdiagnosis should guide optimal recall rates

Keen, J. D., Stroger, J. H. & Keen, J. E., Aug 2017, In : American Journal of Roentgenology. 209, 2, p. W112-W113

Research output: Contribution to journalLetter

1 Scopus citations
2012

Phylogeny of shiga toxin-producing escherichia coli o157 isolated from cattle and clinically ill humans

Bono, J. L., Smith, T. P. L., Keen, J. E., Harhay, G. P., McDaneld, T. G., Mandrell, R. E., Jung, W. K., Besser, T. E., Gerner-Smidt, P., Bielaszewska, M., Karch, H. & Clawson, M. L., Aug 2012, In : Molecular biology and evolution. 29, 8, p. 2047-2062 16 p.

Research output: Contribution to journalArticle

36 Scopus citations

Reduced lentivirus susceptibility in sheep with TMEM154 mutations

Heaton, M. P., Clawson, M. L., Chitko-Mckown, C. G., Leymaster, K. A., Smith, T. P. L., Harhay, G. P., White, S. N., Herrmann-Hoesing, L. M., Mousel, M. R., Lewis, G. S., Kalbfleisch, T. S., Keen, J. E. & Laegreid, W. W., Jan 2012, In : PLoS genetics. 8, 1, e1002467.

Research output: Contribution to journalArticle

43 Scopus citations

Screen detection has both winners and losers

Keen, J. D. & Keen, J., Mar 12 2012, In : Archives of Internal Medicine. 172, 5, 1 p.

Research output: Contribution to journalComment/debate

1 Scopus citations
2010

Animal-to-animal variation in fecal microbial diversity among beef cattle

Durso, L. M., Harhay, G. P., Smith, T. P. L., Bono, J. L., DeSantis, T. Z., Harhay, D. M., Andersen, G. L., Keen, J. E., Laegreid, W. W. & Clawson, M. L., Jul 2010, In : Applied and environmental microbiology. 76, 14, p. 4858-4862 5 p.

Research output: Contribution to journalArticle

105 Scopus citations

Distribution of shiga-toxigenic escherichia coli 0157 in the gastrointestinal tract of naturally 0157-shedding cattle at necropsy

Keen, J. E., Laegreid, W. W., Chitko-McKown, C. G., Durso, L. M. & Bono, J. L., Aug 2010, In : Applied and environmental microbiology. 76, 15, p. 5278-5281 4 p.

Research output: Contribution to journalArticle

21 Scopus citations

Repeated testing by use of culture and PCR assay to detect Tritrichomonas foetus carrier bulls in an infected Nebraska herd

Ondrak, J. D., Keen, J. E., Rupp, G. P., Kennedy, J. A., McVey, D. S. & Baker, W. D., Nov 1 2010, In : Journal of the American Veterinary Medical Association. 237, 9, p. 1068-1073 6 p.

Research output: Contribution to journalArticle

5 Scopus citations
2009

Longitudinal study of Escherichia coli O157:H7 in a beef cattle feedlot and role of high-level shedders in hide contamination

Arthur, T. M., Keen, J. E., Bosilevac, J. M., Brichta-Harhay, D. M., Kalchayanand, N., Shackelford, S. D., Wheeler, T. L., Nou, X. & Koohmaraie, M., 2009, In : Applied and environmental microbiology. 75, 20, p. 6515-6523 9 p.

Research output: Contribution to journalArticle

93 Scopus citations

Outbreak of escherichia coli O157 H7 infections after petting zoo visits, north carolina state fair

Goode, B., O'Reilly, C., Dunn, J., Fullerton, K., Smith, S., Ghneim, G., Keen, J., Durso, L., Davies, M. & Montgomery, S., Jan 2009, In : Archives of Pediatrics and Adolescent Medicine. 163, 1, p. 42-48 7 p.

Research output: Contribution to journalArticle

42 Scopus citations

Phylogenetic classification of Escherichia coli O157:H7 strains of human and bovine origin using a novel set of nucleotide polymorphisms

Clawson, M. L., Keen, J. E., Smith, T. P. L., Durso, L. M., McDaneld, T. G., Mandrell, R. E., Davis, M. A. & Bono, J. L., May 22 2009, In : Genome biology. 10, 5, R56.

Research output: Contribution to journalArticle

29 Scopus citations

What is the point: Will screening mammography save my life?

Keen, J. D. & Keen, J. E., 2009, In : BMC Medical Informatics and Decision Making. 9, 1, 18.

Research output: Contribution to journalArticle

24 Scopus citations
2008

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

Callaway, T. R., Edrington, T. S., Brabban, A. D., Anderson, R. C., Rossman, M. L., Engler, M. J., Carr, M. A., Genovese, K. J., Keen, J. E., Looper, M. L., Kutter, E. M. & Nisbet, D. J., Apr 1 2008, In : Foodborne pathogens and disease. 5, 2, p. 183-191 9 p.

Research output: Contribution to journalArticle

90 Scopus citations
9 Scopus citations
2007

Association of Escherichia coli O157:H7 tir polymorphisms with human infection

Bono, J. L., Keen, J. E., Clawson, M. L., Durso, L. M., Heaton, M. P. & Laegreid, W. W., Aug 24 2007, In : BMC Infectious Diseases. 7, 98.

Research output: Contribution to journalArticle

50 Scopus citations

Does the marginal benefit exceed the marginal cost? [1]

Keen, J. D. & Keen, J. E., Apr 2007, In : Radiology. 243, 1, p. 299-300 2 p.

Research output: Contribution to journalLetter

2 Scopus citations

Genetic diversity among clonal lineages within Escherichia coli O157:H7 stepwise evolutionary model

Feng, P. C. H., Monday, S. R., Lacher, D. W., Allison, L., Siitonen, A., Keys, C., Eklund, M., Nagano, H., Karch, H., Keen, J. & Whittam, T. S., Nov 2007, In : Emerging infectious diseases. 13, 11, p. 1701-1706 6 p.

Research output: Contribution to journalArticle

53 Scopus citations
27 Scopus citations

Molecular serotyping of Escherichia coli O111:H8

Durso, L. M., Bono, J. L. & Keen, J. E., May 2007, In : Journal of Microbiological Methods. 69, 2, p. 381-383 3 p.

Research output: Contribution to journalArticle

6 Scopus citations

Risk behaviors for disease transmission among petting zoo attendees

McMillian, M., Dunn, J. R., Keen, J. E., Brady, K. L. & Jones, T. F., Oct 1 2007, In : Journal of the American Veterinary Medical Association. 231, 7, p. 1036-1038 3 p.

Research output: Contribution to journalArticle

25 Scopus citations
9 Scopus citations
2006

Association of neonatal serum immunoglobulin G1 concentration with health and performance in beef calves

Dewell, R. D., Hungerford, L. L., Keen, J. E., Laegreid, W. W., Griffin, D. D., Rupp, G. P. & Grotelueschen, D. M., Mar 15 2006, In : Journal of the American Veterinary Medical Association. 228, 6, p. 914-921 8 p.

Research output: Contribution to journalArticle

49 Scopus citations

Effects of a Single Foot Rot Incident on Weight Performance of Feedlot Steers

Tibbetts, G. K., Devin, T. M., Griffin, D., Keen, J. E. & Rupp, G. P., Dec 1 2006, In : Professional Animal Scientist. 22, 6, p. 450-453 4 p.

Research output: Contribution to journalArticle

8 Scopus citations

Fecal prevalence of Escherichia coli O157, Salmonella, Listeria, and bacteriophage infecting E. coli O157:H7 in feedlot cattle in the southern plains region of the United States

Callaway, T. R., Edrington, T. S., Brabban, A. D., Keen, J. E., Anderson, R. C., Rossman, M. L., Engler, M. J., Genovese, K. J., Gwartney, B. L., Reagan, J. O., Poole, T. L., Harvey, R. B., Kutter, E. M. & Nisbet, D. J., Sep 2006, In : Foodborne pathogens and disease. 3, 3, p. 234-244 11 p.

Research output: Contribution to journalArticle

56 Scopus citations

Shiga-toxigenic Escherichia coli O157 in agricultural fair livestock, United States

Keen, J. E., Wittum, T. E., Dunn, J. R., Bono, J. L. & Durso, L. M., May 2006, In : Emerging infectious diseases. 12, 5, p. 780-786 7 p.

Research output: Contribution to journalArticle

81 Scopus citations
2005

Fecal prevalence and diversity of Salmonella species in lactating dairy cattle in four states

Callaway, T. R., Keen, J. E., Edrington, T. S., Baumgard, L. H., Spicer, L., Fonda, E. S., Griswold, K. E., Overton, T. R., VanAmburgh, M. E., Anderson, R. C., Genovese, K. J., Poole, T. L., Harvey, R. B. & Nisbet, D. J., Oct 2005, In : Journal of Dairy Science. 88, 10, p. 3603-3608 6 p.

Research output: Contribution to journalArticle

54 Scopus citations

Molecular serotyping of Escherichia coli O26:H11

Durso, L. M., Bono, J. L. & Keen, J. E., Aug 2005, In : Applied and environmental microbiology. 71, 8, p. 4941-4944 4 p.

Research output: Contribution to journalArticle

35 Scopus citations

Shiga-toxigenic Escherichia coli O157:H7 infections among livestock exhibitors and visitors at a Texas Country Fair

Durso, L. M., Reynolds, K., Bauer, N. & Keen, J. E., Jun 2005, In : Vector-Borne and Zoonotic Diseases. 5, 2, p. 193-201 9 p.

Research output: Contribution to journalArticle

46 Scopus citations

Use of bovine single nucleotide polymorphism markers to verify sample tracking in beef processing

Heaton, M. P., Keen, J. E., Clawson, M. L., Harhay, G. P., Bauer, N., Shultz, C., Green, B. T., Durso, L., Chitko-McKown, C. G. & Laegreid, W. W., Apr 15 2005, In : Journal of the American Veterinary Medical Association. 226, 8, p. 1311-1314 4 p.

Research output: Contribution to journalArticle

37 Scopus citations
2004

Escherichia coli O157:H7 in a cohort of weaned, preconditioned range beef calves

Dunn, J. R., Keen, J. E., Del Vecchio, R., Wittum, T. E. & Thompson, R. A., Nov 2004, In : Journal of food protection. 67, 11, p. 2391-2396 6 p.

Research output: Contribution to journalArticle

17 Scopus citations

Estimation of the basic reproduction ratio (R0) for Shiga toxin-producing Escherichia coli O157:H7 (STEC O157) in beef calves

Laegreid, W. W. & Keen, J. E., Apr 2004, In : Epidemiology and Infection. 132, 2, p. 291-295 5 p.

Research output: Contribution to journalArticle

8 Scopus citations

Evaluation of a Real-Time PCR Kit for Detecting Escherichia coli O157 in Bovine Fecal Samples

Bono, J. L., Keen, J. E., Miller, L. C., Fox, J. M., Chitko-McKown, C. G., Heaton, M. P. & Laegreid, W. W., Mar 2004, In : Applied and environmental microbiology. 70, 3, p. 1855-1857 3 p.

Research output: Contribution to journalArticle

24 Scopus citations

Gene expression profiling of bovine macrophages in response to Escherichia coli O157:H7 lipopolysaccharide

Chitko-McKown, C. G., Fox, J. M., Miller, L. C., Heaton, M. P., Bono, J. L., Keen, J. E., Grosse, W. M. & Laegreid, W. W., May 17 2004, In : Developmental and Comparative Immunology. 28, 6, p. 635-645 11 p.

Research output: Contribution to journalArticle

23 Scopus citations

Prevalence of Escherichia coli O157:H7 in white-tailed deer from Louisiana

Dunn, J. R., Keen, J. E., Moreland, D. & Thompson, R. A., Apr 2004, In : Journal of wildlife diseases. 40, 2, p. 361-365 5 p.

Research output: Contribution to journalArticle

44 Scopus citations

Prevalence of shiga-toxigenic Escherichia coli O157:H7 in adult dairy cattle

Dunn, J. R., Keen, J. E. & Thompson, R. A., Apr 1 2004, In : Journal of the American Veterinary Medical Association. 224, 7, p. 1151-1158 8 p.

Research output: Contribution to journalArticle

36 Scopus citations
2003

Forage feeding to reduce preharvest Escherichia coli populations in cattle, a review

Callaway, T. R., Elder, R. O., Keen, J. E., Anderson, R. C. & Nisbet, D. J., Mar 2003, In : Journal of Dairy Science. 86, 3, p. 852-860 9 p.

Research output: Contribution to journalArticle

100 Scopus citations
2002

Association of bovine neonatal Fc receptor α-chain gene (FCGRT) haplotypes with serum IgG concentration in newborn calves

Laegreid, W. W., Heaton, M. P., Keen, J. E., Grosse, W. M., Chitko-McKown, C. G., Smith, T. P. L., Keele, J. W., Bennett, G. L. & Besser, T. E., Dec 1 2002, In : Mammalian Genome. 13, 12, p. 704-710 7 p.

Research output: Contribution to journalArticle

39 Scopus citations
112 Scopus citations

Prevalence of fecal shedding of Salmonella spp in dairy herds

Huston, C. L., Wittum, T. E., Love, B. C. & Keen, J. E., Mar 1 2002, In : Journal of the American Veterinary Medical Association. 220, 5, p. 645-649 5 p.

Research output: Contribution to journalArticle

83 Scopus citations

Variations in the csgD promoter of Escherichia coli O157:H7 associated with increased virulence in mice and increased invasion of HEp-2 cells

Uhlich, G. A., Keen, J. E. & Elder, R. O., 2002, In : Infection and immunity. 70, 1, p. 395-399 5 p.

Research output: Contribution to journalArticle

81 Scopus citations
2001

Development of an enzyme-linked immunosorbent assay for detection of the gregarious hymenopteran parasitoid Muscidifurax raptorellus in house fly pupae

Keen, D. P., Keen, J. E., He, Y. & Jones, C. J., 2001, In : Biological Control. 21, 2, p. 140-151 12 p.

Research output: Contribution to journalArticle

2 Scopus citations

Genotypic Analyses of Escherichia coli O157:H7 and O157 Nonmotile Isolates Recovered from Beef Cattle and Carcasses at Processing Plants in the Midwestern States of the United States

Barkocy-Gallagher, G. A., Arthur, T. M., Siragusa, G. R., Keen, J. E., Elder, R. O., Laegreid, W. W. & Koohmaraie, M., Sep 2001, In : Applied and environmental microbiology. 67, 9, p. 3810-3818 9 p.

Research output: Contribution to journalArticle

87 Scopus citations

Interleukin-8 haplotype structure from nucleotide sequence variation in commercial populations of U.S. beef cattle

Heaton, M. P., Chitko-McKown, C. G., Grosse, W. M., Keele, J. W., Keen, J. E. & Laegreid, W. W., 2001, In : Mammalian Genome. 12, 3, p. 219-226 8 p.

Research output: Contribution to journalArticle

33 Scopus citations

Murine monoclonal antibodies against Escherichia coli O4 lipopolysaccharide and H5 flagellin

Rivera-Betancourt, M. & Keen, J. E., 2001, In : Journal of clinical microbiology. 39, 9, p. 3409-3413 5 p.

Research output: Contribution to journalArticle

Mutations in the csgD Promoter Associated with Variations in Curli Expression in Certain Strains of Escherichia coli O157:H7

Uhlich, G. A., Keen, J. E. & Elder, R. O., May 2001, In : Applied and environmental microbiology. 67, 5, p. 2367-2370 4 p.

Research output: Contribution to journalArticle

94 Scopus citations
2000

Correlation of enterohemorrhagic Escherichia coli 0157 prevalence in feces, hides, and carcasses of beef cattle during processing

Elder, R. O., Keen, J. E., Siragusa, G. R., Barkocy-Gallagher, G. A., Koohmaraie, M. & Laegreid, W. W., Mar 28 2000, In : Proceedings of the National Academy of Sciences of the United States of America. 97, 7, p. 2999-3003 5 p.

Research output: Contribution to journalArticle

681 Scopus citations

Murine Monoclonal Antibodies Specific for Lipopolysaccharide of Escherichia coli O26 and O111

Rivera-Betancourt, M. & Keen, J. E., 2000, In : Applied and environmental microbiology. 66, 9, p. 4124-4127 4 p.

Research output: Contribution to journalArticle

12 Scopus citations
1999

Breeding soundness examination of North American bison bulls

Keen, J. E., Rupp, G. P., Wittenberg, P. A. & Walker, R. E., Apr 15 1999, In : Journal of the American Veterinary Medical Association. 214, 8, p. 1212-1217 6 p.

Research output: Contribution to journalArticle

12 Scopus citations

Prevalence of Escherichia coli O157:H7 in range beef calves at weaning

Laegreid, W. W., Elder, R. O. & Keen, J. E., Oct 1999, In : Epidemiology and Infection. 123, 2, p. 291-298 8 p.

Research output: Contribution to journalArticle

127 Scopus citations
1998

Development of a blocking enzyme-linked immunosorbent assay for detection of serum antibodies to O157 antigen of Escherichia coli

Laegreid, W., Hoffman, M., Keen, J., Elder, R. & Kwang, J., 1998, In : Clinical and diagnostic laboratory immunology. 5, 2, p. 242-246 5 p.

Research output: Contribution to journalArticle

Open Access
20 Scopus citations