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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Animal Science and Veterinary 43 910 839 65 62 165 9486

John R. Barta publications per year

The chart shows the history of publications by John R. Barta between 1984 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. John R. Barta published across 42 years, from 1984 to 2025, averaging 4.4 papers a year. Output peaked at 15 publications in 2019. 15 of the 184 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1984 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2019. 1984: 3 publications 1985: 0 publications 1986: 2 publications 1987: 1 publication 1988: 2 publications 1989: 4 publications 1990: 5 publications 1991: 6 publications 1992: 3 publications 1993: 3 publications 1994: 1 publication 1995: 1 publication 1996: 3 publications 1997: 5 publications 1998: 8 publications 1999: 1 publication 2000: 4 publications 2001: 6 publications 2002: 4 publications 2003: 2 publications 2004: 3 publications 2005: 2 publications 2006: 3 publications 2007: 1 publication 2008: 5 publications 2009: 5 publications 2010: 5 publications 2011: 4 publications 2012: 4 publications 2013: 4 publications 2014: 7 publications 2015: 9 publications 2016: 6 publications 2017: 4 publications 2018: 3 publications 2019: 15 publications 2020: 5 publications 2021: 9 publications 2022: 6 publications 2023: 5 publications 2024: 8 publications 2025: 7 publications
1984 2025

184 publications in total across all disciplines

View publications per year as a table
John R. Barta: publications per year, 1984 to 2025
Year Publications
1984 3
1985 0
1986 2
1987 1
1988 2
1989 4
1990 5
1991 6
1992 3
1993 3
1994 1
1995 1
1996 3
1997 5
1998 8
1999 1
2000 4
2001 6
2002 4
2003 2
2004 3
2005 2
2006 3
2007 1
2008 5
2009 5
2010 5
2011 4
2012 4
2013 4
2014 7
2015 9
2016 6
2017 4
2018 3
2019 15
2020 5
2021 9
2022 6
2023 5
2024 8
2025 7
Total 184
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John R. Barta publications per year - data summary

  • John R. Barta, a Animal Science and Veterinary scholar from University of Guelph, has 184 publications recorded across 42 years, from 1984 to 2025.
  • The oldest publication on record dates to 1984 and the most recent to 2025.
  • The most productive year is 2019, with 15 publications.
  • The least productive years with any output are 1987, 1994, 1995, 1999 and others, with 1 publication each.
  • 1 of the 42 years in the span carries no publications at all (1985).
  • The rate of publication averages 4.4 papers per year over the whole span, or 4.5 per year counting only the 41 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 35 publications, 19% of the career total.
  • Split into equal eras - 1984-1997: 39 publications (2.8 per year); 1998-2011: 53 publications (3.8 per year); 2012-2025: 92 publications (6.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

John R. Barta 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 John R. Barta sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 84 bars. Horizontal axis: publications, 29–33 to 442+. Vertical axis: number of scientists, 0 to 109. Most scientists, 109, have 119–123 publications. The last bar groups every scientist with 442 publications or more. The highlighted bar, 164–168 publications, is where this scientist sits. 29–33 publications: 1 scientist 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
29–33 publications 442+

This scientist: 165 publications — 63rd percentile

63% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Animal Science and Veterinary scientists by publication count, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
Publications Scientists This scientist
29–33 1
34–38 6
39–43 17
44–48 23
49–53 28
54–58 44
59–63 66
64–68 75
69–73 71
74–78 85
79–83 108
84–88 105
89–93 84
94–98 103
99–103 97
104–108 95
109–113 89
114–118 88
119–123 109
124–128 93
129–133 89
134–138 95
139–143 92
144–148 80
149–153 75
154–158 74
159–163 67
164–168 53 165
169–173 62
174–178 63
179–183 50
184–188 55
189–193 50
194–198 27
199–203 44
204–208 31
209–213 28
214–218 38
219–223 33
224–228 36
229–233 29
234–238 35
239–243 23
244–248 24
249–253 29
254–258 28
259–263 21
264–268 25
269–273 11
274–278 18
279–283 13
284–288 18
289–293 10
294–298 12
299–303 11
304–308 15
309–313 14
314–318 14
319–323 8
324–328 8
329–333 13
334–338 14
339–343 13
344–348 10
349–353 11
354–358 5
359–363 8
364–368 8
369–373 6
374–378 7
379–383 8
384–388 3
389–393 4
394–398 5
399–403 8
404–408 5
409–413 4
414–418 3
419–423 8
424–428 5
429–433 3
434–438 5
439–441 5
442+ 99
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John R. Barta publication distribution in Animal Science and Veterinary in 2026 - data summary

  • The chart plots the publication count of all 3,155 Animal Science and Veterinary scientists ranked by Research.com in 2026, grouped into 84 ranges running from 29–33 to 442+ publications.
  • John R. Barta, a Animal Science and Veterinary scholar from University of Guelph, records 165 publications - the 63rd percentile of the discipline.
  • 63% of ranked Animal Science and Veterinary scientists score the same or lower than John R. Barta, and about 37% score higher.
  • The median of the discipline falls in the 139–143 publications range, and John R. Barta ranks above the median.
  • The most crowded range is 119–123 publications, holding 109 scientists (3% of the field).
  • 47% of the field sits in the lowest quarter of the value range (up to 129–133 publications), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 442 publications or more, 99 scientists in all (3% of the field).

John R. Barta 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 John R. Barta sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 58 bars. Horizontal axis: D-Index, 20 to 77+. Vertical axis: number of scientists, 0 to 158. Most scientists, 158, have 31 D-Index. The last bar groups every scientist with 77 D-Index or more. The highlighted bar, 43 D-Index, is where this scientist sits. 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: 43 D-Index — 71st percentile

71% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Animal Science and Veterinary scientists by D-index, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
D-Index Scientists This scientist
20 5
21 22
22 31
23 44
24 53
25 66
26 80
27 101
28 106
29 116
30 154
31 158
32 143
33 137
34 126
35 134
36 112
37 115
38 105
39 111
40 107
41 87
42 74
43 62 43
44 61
45 41
46 51
47 43
48 28
49 47
50 40
51 34
52 33
53 43
54 16
55 32
56 21
57 18
58 28
59 33
60 17
61 21
62 18
63 21
64 9
65 20
66 11
67 16
68 12
69 17
70 13
71 15
72 11
73 11
74 14
75 5
76 6
77+ 100
Download as CSV

John R. Barta D-index placement in Animal Science and Veterinary in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 3,155 Animal Science and Veterinary scientists ranked by Research.com in 2026, grouped into 58 ranges running from 20 to 77+ D-Index.
  • John R. Barta, a Animal Science and Veterinary scholar from University of Guelph, records 43 D-Index - the 71st percentile of the discipline.
  • 71% of ranked Animal Science and Veterinary scientists score the same or lower than John R. Barta, and about 29% score higher.
  • The median of the discipline falls in the 36 D-Index range, and John R. Barta ranks above the median.
  • The most crowded range is 31 D-Index, holding 158 scientists (5% of the field).
  • 43% of the field sits in the lowest quarter of the value range (up to 34 D-Index), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 77 D-Index or more, 100 scientists in all (3% of the field).

Overview

John R. Barta is affiliated with the University of Guelph in Canada and has contributed to research primarily in agricultural and biological sciences, immunology and microbiology, and veterinary fields. Their work spans several subfields, including animal science and zoology, parasitology, small animals, ecology, and molecular biology.

Their research portfolio includes a strong focus on coccidia and coccidiosis, parasitic infections and diagnostics, helminth infection and control, animal nutrition and physiology, and veterinary medicine and infectious diseases, as well as vector-borne infectious diseases.

Frequently published in venues such as Poultry Science and the Journal of Parasitology, Barta's works also appear in Veterinary Parasitology Regional Studies and Reports, Frontiers in Veterinary Science, and Parasitology Research.

Recent papers highlight various aspects of parasitology and poultry science. Titles include:

  • Monitoring coccidia in commercial broiler chicken flocks in Ontario: comparing oocyst cycling patterns in flocks using anticoccidial medications or live vaccination (2020, Poultry Science)
  • Exploiting digital droplet PCR and Next Generation Sequencing technologies to determine the relative abundance of individual Eimeria species in a DNA sample (2021, Veterinary Parasitology)
  • Multilocus sequencing of Hepatozoon cf. griseisciuri infections in Ontario eastern gray squirrels (Sciurus carolinensis) uncovers two genotypically distinct sympatric parasite species (2020, Parasitology Research)
  • Restoration of anticoccidial sensitivity to a commercial broiler chicken facility in Canada (2020, Poultry Science)
  • Standardized ileal digestibility of amino acids in broiler chickens fed single or mixture of feed ingredients-based diets with or without Eimeria challenge (2022, Poultry Science)

Barta has co-authored works frequently with several collaborators, including P.S. Kruth, Ryan P. Snyder, Alexandre N. Léveillé, Jessica L. Rotolo, and Billy M. Hargis.

Best Publications

  • The new higher level classification of eukaryotes with emphasis on the taxonomy of protists

    Sina M Adl;Alastair G. B. Simpson;Mark A Farmer;Robert A. Andersen

  • Phylogenetic relationships among eight Eimeria species infecting domestic fowl inferred using complete small subunit ribosomal DNA sequences.

    John R. Barta;Donald S. Martin;Paul A. Liberator;Michael Dashkevicz

  • An Eimeriid origin of isosporoid coccidia with Stieda bodies as shown by phylogenetic analysis of small subunit ribosomal RNA gene sequences.

    Ramon A. Carreno;John R. Barta

  • Redescription of Neospora caninum and its differentiation from related coccidia.

    J P Dubey;B C Barr;J R Barta;I Bjerkås

  • A selective review of advances in coccidiosis research.

    H David Chapman;John R Barta;Damer Blake;Arthur Gruber

  • Canine hepatozoonosis: two disease syndromes caused by separate Hepatozoon spp.

    Gad Baneth;John S Mathew;Varda Shkap;Douglass K Macintire

  • DNA barcoding identifies Eimeria species and contributes to the phylogenetics of coccidian parasites (Eimeriorina, Apicomplexa, Alveolata).

    Joseph D. Ogedengbe;Robert H. Hanner;John R. Barta

  • The conceptual basis for a new classification of the coccidia.

    Astrid M Tenter;John R Barta;Ian Beveridge;Donald W Duszynski

  • What is Cryptosporidium? Reappraising its biology and phylogenetic affinities

    John R. Barta;R.C. Andrew Thompson

  • The Genus Atoxoplasma (Garnham 1950) as a Junior Objective Synonym of the Genus Isospora (Schneider 1881) Species Infecting Birds and Resurrection of Cystoisospora (Frenkel 1977) as the Correct Genus for Isospora Species Infecting Mammals

    J. R. Barta;M. D. Schrenzel;M. D. Schrenzel;R. Carreno;R. Carreno;B. A. Rideout;B. A. Rideout

  • Phylogenetic Position of the Adeleorinid Coccidia (Myzozoa, Apicomplexa, Coccidia, Eucoccidiorida, Adeleorina) Inferred Using 18S rDNA Sequences

    John R. Barta;Joseph D. Ogedengbe;Donald S. Martin;Todd G. Smith

  • Analysis of immunological cross-protection and sensitivities to anticoccidial drugs among five geographical and temporal strains of Eimeria maxima.

    A.G. Martin;H.D. Danforth;J.R. Barta;M.A. Fernando

  • COMPARISON OF FOUR MURINE EIMERIA SPECIES IN IMMUNOCOMPETENT AND IMMUNODEFICIENT MICE

    Marco L. Schito;John R. Barta;Bill Chobotar

  • Coccidiosis: recent advancements in the immunobiology of Eimeria species, preventive measures, and the importance of vaccination as a control tool against these Apicomplexan parasites

    Chaitanya Shivaramaiah;John R Barta;Xochitl Hernandez-Velasco;Guillermo Téllez

  • Genetic and Antigenic Evidence Supports the Separation of Hepatozoon canis and Hepatozoon americanum at the Species Level

    Gad Baneth;John R. Barta;Varda Shkap;Donald S. Martin

  • Evolutionary relationships of avian Eimeria species among other Apicomplexan protozoa: monophyly of the apicomplexa is supported.

    J R Barta;M C Jenkins;H D Danforth

  • Plastids are widespread and ancient in parasites of the phylum Apicomplexa.

    Naomi Lang-Unnasch;Michael E. Reith;Janet Munholland;John R. Barta

  • Phylogenetic analysis of coccidia based on 18S rDNA sequence comparison indicates that Isospora is most closely related to Toxoplasma and Neospora.

    Ramon A. Carreno;Beate E. Schnitzler;Alex C. Jeffries;Astrid M. Tenter

  • Species and strain differentiation of Eimeria spp. of the domestic fowl using DNA polymorphisms amplified by arbitrary primers.

    J. D. Procunier;M. A. Fernando;J. R. Barta

  • Divergent nuclear 18S rDNA paralogs in a turkey coccidium, Eimeria meleagrimitis, complicate molecular systematics and identification.

    Shiem El-Sherry;Mosun E. Ogedengbe;Mian A. Hafeez;John R. Barta

  • Molecular approaches for inferring evolutionary relationships among protistan parasites.

    John R. Barta

Frequent Co-Authors

Dongwan Yoo
Dongwan Yoo University of Illinois at Urbana-Champaign
Billy M. Hargis
Billy M. Hargis University of Arkansas at Fayetteville
Elijah G. Kiarie
Elijah G. Kiarie University of Guelph
Mark C. Jenkins
Mark C. Jenkins United States Department of Agriculture
Trevor K. Smith
Trevor K. Smith University of Guelph
Gad Baneth
Gad Baneth Hebrew University of Jerusalem
Guillermo Tellez
Guillermo Tellez University of Arkansas at Fayetteville
Jitender P. Dubey
Jitender P. Dubey Agricultural Research Service
Michael J. Arrowood
Michael J. Arrowood Centers for Disease Control and Prevention
David Modrý
David Modrý University of Veterinary and Pharmaceutical Sciences

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