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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 30 2425 2206 689 568 61 3797

Andrea E. Packham publications per year

The chart shows the history of publications by Andrea E. Packham between 1997 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Andrea E. Packham published across 29 years, from 1997 to 2025, averaging 2.2 papers a year. Output peaked at 6 publications in 2007. 4 of the 65 publications appeared in the last two years.

No. of publications
2 4 6
Bar chart. Horizontal axis: year, 1997 to 2025. Vertical axis: number of publications, 0 to 6. Peak 6 publications in 2007. 1997: 4 publications 1998: 2 publications 1999: 1 publication 2000: 2 publications 2001: 3 publications 2002: 3 publications 2003: 2 publications 2004: 3 publications 2005: 0 publications 2006: 0 publications 2007: 6 publications 2008: 4 publications 2009: 1 publication 2010: 3 publications 2011: 2 publications 2012: 2 publications 2013: 2 publications 2014: 3 publications 2015: 1 publication 2016: 3 publications 2017: 2 publications 2018: 0 publications 2019: 3 publications 2020: 2 publications 2021: 3 publications 2022: 0 publications 2023: 4 publications 2024: 2 publications 2025: 2 publications
1997 2025

65 publications in total across all disciplines

View publications per year as a table
Andrea E. Packham: publications per year, 1997 to 2025
Year Publications
1997 4
1998 2
1999 1
2000 2
2001 3
2002 3
2003 2
2004 3
2005 0
2006 0
2007 6
2008 4
2009 1
2010 3
2011 2
2012 2
2013 2
2014 3
2015 1
2016 3
2017 2
2018 0
2019 3
2020 2
2021 3
2022 0
2023 4
2024 2
2025 2
Total 65
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Andrea E. Packham 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 Andrea E. Packham 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, 59–63 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: 61 publications — 5th percentile

5% 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 61
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
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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Andrea E. Packham 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 Andrea E. Packham 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, 30 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: 30 D-Index — 25th percentile

25% 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 30
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
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
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Overview

Andrea E. Packham is affiliated with the University of California, Davis in the United States. Their research primarily falls within the fields of Immunology and Microbiology, with additional work connected to Medicine. The subfields of study where they are most active include Parasitology, Microbiology, Infectious Diseases, Ecology, and Epidemiology.

The main topics covered in Packham's research involve:

  • Toxoplasma gondii Research Studies
  • Parasitic Infections and Diagnostics
  • Reproductive Tract Infections Research
  • Aquaculture Disease Management and Microbiota
  • Microbial Infections and Disease Research
  • Rabies Epidemiology and Control
  • Enterobacteriaceae and Cronobacter Research

They have contributed to recent papers across several reputable venues in the fields of parasitology and infectious diseases. Selected publications include:

  • "Predators, Disease, and Environmental Change in the Nearshore Ecosystem: Mortality in Southern Sea Otters (Enhydra lutris nereis) From 1998-2012," 2020, published in Frontiers in Marine Science
  • "Newly detected, virulent Toxoplasma gondii COUG strain causing fatal steatitis and toxoplasmosis in southern sea otters (Enhydra lutris nereis)," 2023, Frontiers in Marine Science
  • "Borrelia burgdorferi and Borrelia miyamotoi seroprevalence in California blood donors," 2020, PLoS ONE
  • "Quantification of viable protozoan parasites on leafy greens using molecular methods," 2021, Food Microbiology
  • "Molecular detection of Sarcocystis neurona in cerebrospinal fluid from 210 horses with suspected neurologic disease," 2021, Veterinary Parasitology

Frequent co-authors in Packham's work include:

  • Woutrina Smith
  • Patricia A. Conrad
  • Karen Shapiro
  • Monica Aleman
  • Nicola Pusterla

Packham's publications appear regularly in scientific journals such as Veterinary Parasitology, Frontiers in Marine Science, Food Microbiology, Journal of Veterinary Internal Medicine, and PLoS ONE.

Best Publications

  • Coastal freshwater runoff is a risk factor for Toxoplasma gondii infection of southern sea otters (Enhydra lutris nereis)

    M.A Miller;I.A Gardner;C Kreuder;D.M Paradies

  • Evidence of vertical transmission of Neospora sp infection in dairy cattle.

    Mark L Anderson;James P. Reynolds;Joan D Rowe;Karen W. Sverlow

  • Type X Toxoplasma gondii in a wild mussel and terrestrial carnivores from coastal California: new linkages between terrestrial mammals, runoff and toxoplasmosis of sea otters.

    M A Miller;W A Miller;P A Conrad;E R James

  • Description of a new Neospora species (Protozoa: Apicomplexa: Sarcocystidae).

    Antoinette E. Marsh;Bradd C. Barr;Bradd C. Barr;Andrea E. Packham;Andrea E. Packham;Patricia A. Conrad

  • Molecular and bioassay-based detection of Toxoplasma gondii oocyst uptake by mussels (Mytilus galloprovincialis)

    Kristen D Arkush;Melissa A Miller;Melissa A Miller;Christian M Leutenegger;Ian A Gardner

  • Isolation and Characterization of Two Parasitic Protozoa from a Pacific Harbor Seal (Phoca Vitulina Richardsi) With Meningoencephalomyelitis

    Melissa A. Miller;Karen Sverlow;Paul R. Crosbie;Bradd C. Barr

  • A Modified Agglutination Test for Neospora caninum: Development, Optimization, and Comparison to the Indirect Fluorescent-Antibody Test and Enzyme-Linked Immunosorbent Assay

    Andrea E. Packham;Karen W. Sverlow;Patricia A. Conrad;Emily F. Loomis

  • A POLYGEN-adjuvanted killed Neospora caninum tachyzoite preparation failed to prevent foetal infection in pregnant cattle following i.v./i.m. experimental tachyzoite challenge.

    A. G. Andrianarivo;Joan D Rowe;B. C. Barr;Mark L Anderson

  • Evaluation of an indirect fluorescent antibody test (IFAT) for demonstration of antibodies to Toxoplasma gondii in the sea otter (Enhydra lutris).

    M. A. Miller;Ian Gardner;A. Packham;Jonna A Mazet

  • Immune responses in pregnant cattle and bovine fetuses following experimental infection with Neospora caninum.

    A. Andrianarivo;B. Barr;Mark L Anderson;Joan D Rowe

  • Chemical inactivation of Toxoplasma gondii oocysts in water.

    Katlyn E. Wainwright;Melissa A. Miller;Bradd C. Barr;Ian A. Gardner

  • Comparison of a serum indirect fluorescent antibody test with two Western blot tests for the diagnosis of equine protozoal myeloencephalitis.

    Paulo C. Duarte;Barbara M. Daft;Patricia A. Conrad;Andrea E. Packham

  • Risk factors for Toxoplasma gondii infection in wild rodents from central coastal California and a review of T. gondii prevalence in rodents.

    Haydee A. Dabritz;Melissa A. Miller;Ian A. Gardner;Andrea E. Packham

  • A protozoal-associated epizootic impacting marine wildlife: mass-mortality of southern sea otters (Enhydra lutris nereis) due to Sarcocystis neurona infection.

    Melissa A. Miller;Patricia A. Conrad;Michael Harris;Brian Hatfield

  • Immunogenicity of a killed whole Neospora caninum tachyzoite preparation formulated with different adjuvants

    A. G. Andrianarivo;L. Choromanski;S. P. McDonough;A. E. Packham

  • Physical inactivation of Toxoplasma gondii oocysts in water.

    Katlyn E. Wainwright;Manuel Lagunas-Solar;Melissa A. Miller;Melissa A. Miller;Bradd C. Barr

  • Methods to produce and safely work with large numbers of Toxoplasma gondii oocysts and bradyzoite cysts

    Heather Fritz;B. Barr;A. Packham;A. Melli

  • EVALUATION AND COMPARISON OF AN INDIRECT FLUORESCENT ANTIBODY TEST FOR DETECTION OF ANTIBODIES TO SARCOCYSTIS NEURONA, USING SERUM AND CEREBROSPINAL FLUID OF NATURALLY AND EXPERIMENTALLY INFECTED, AND VACCINATED HORSES

    Paulo C. Duarte;Barbara M. Daft;Patricia A. Conrad;Andrea E. Packham

  • Detection of Neospora sp. from infected bovine tissues by PCR and probe hybridization.

    Michael S. Y. Ho;Bradd C. Barr;Joan D. Rowe;Mark L. Anderson

  • QUALITATIVE EVALUATION OF SELECTIVE TESTS FOR DETECTION OF NEOSPORA HUGHESI ANTIBODIES IN SERUM AND CEREBROSPINAL FLUID OF EXPERIMENTALLY INFECTED HORSES

    Andrea E. Packham;Patricia A. Conrad;W. David Wilson;Lisa V. Jeanes

Frequent Co-Authors

Patricia A. Conrad
Patricia A. Conrad University of California, Davis
Bradd C. Barr
Bradd C. Barr University of California, Davis
Melissa A. Miller
Melissa A. Miller California Department of Fish and Wildlife
Ian A. Gardner
Ian A. Gardner University of Prince Edward Island
Antoinette E. Marsh
Antoinette E. Marsh The Ohio State University
Mark L Anderson
Mark L Anderson University of California, Davis
Frances M. D. Gulland
Frances M. D. Gulland University of California, Davis
Stefan Wuertz
Stefan Wuertz Nanyang Technological University
Jonna A. K. Mazet
Jonna A. K. Mazet University of California, Davis
Linda J. Lowenstine
Linda J. Lowenstine University of California, Davis

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Related Online Degrees & Career Pathways

For those interested in expanding their expertise beyond traditional Animal Science and Veterinary fields, there are various related online degrees that can complement your career goals. For example, pursuing psyd online programs apa accredited offers advanced psychological training without the GRE hurdle, ideal for animal behaviorists or those interested in the mental health aspects of animal care.

Additionally, careers in counseling provide unique pathways that intersect with animal welfare and community health. One such option is to become a drug counselor online, which can lead to opportunities helping individuals affected by substance abuse, including those working in therapeutic animal-assisted interventions.

For a more holistic approach to care, consider exploring online marriage and family therapy programs. Such training can enhance your skills in supporting families and animals navigating complex emotional and behavioral challenges.

Finally, for those aiming at the highest academic and professional levels, the online phd counseling routes offer an affordable way to gain expertise and leadership roles in counseling specialties that often intersect with veterinary and animal science domains.

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