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D-Index & Metrics

Animal Science and Veterinary

D-Index
36
Citations
5283
World Ranking
1593
National Ranking
463

Overview

P.J. Berger is affiliated with Iowa State University in the United States and works primarily in the fields of Environmental Science and Immunology and Microbiology. Their research focuses on several subfields, including Water Science and Technology, Parasitology, Infectious Diseases, and Health, Toxicology and Mutagenesis.

The main topics of their work include:

  • Fecal contamination and water quality
  • Parasitic Infections and Diagnostics
  • Viral gastroenteritis research and epidemiology
  • Water Treatment and Disinfection

P.J. Berger has published research in frequent collaboration with co-authors such as Jake Crosby, P. M. Wallis, Marcella Hutchinson, Mia Mattioli, and Katharine M. Benedict.

The scientist has contributed articles to several publication venues, including:

  • Journal of Microbiological Methods
  • AQUA - Water Infrastructure Ecosystems and Society
  • SSRN Electronic Journal

Among recent papers, Berger authored "Improving groundwater treatment decisions using Giardia and total aerobic spores to assess surface water influence," published in 2025 in AQUA - Water Infrastructure Ecosystems and Society.

In 2024, Berger published "Improving Drinking Water Treatment Decisions Using Giardia, Cryptosporidium, Microscopic Particulate Analysis (Diatom) and Total Aerobic Spore Detections for Ground Water Under the Direct Influence of Surface Water Determination" in the SSRN Electronic Journal.

Earlier work includes a 2020 publication in the Journal of Microbiological Methods titled "Identifying septic pollution exposure routes during a waterborne norovirus outbreak - A new application for human-associated microbial source tracking qPCR," authored by Mia Mattioli with Berger as a frequent collaborator in related research areas.

Best Publications

  • Birth weight as a predictor of calving ease and perinatal mortality in Holstein cattle.

    J.M. Johanson;P.J. Berger

  • Genetic and phenotypic parameters for 305-day yield, fertility, and survival in Holsteins.

    C.M.B. Dematawewa;P.J. Berger

  • Phenotypic trends in incidence of stillbirth for Holsteins in the United States.

    C.L. Meyer;P.J. Berger;K.J. Koehler;J.R. Thompson

  • Effect of Dystocia on Yield, Fertility, and Cow Losses and an Economic Evaluation of Dystocia Scores for Holsteins

    C.M.B. Dematawena;P.J. Berger

  • Yield and Fertility Relationships in Dairy Cattle

    Leslie B Hansen;A. E. Freeman;P. J. Berger

  • Genetic Aspects of Milk Yield and Reproductive Performance

    P.J. Berger;R.D. Shanks;A.E. Freeman;R.C. Laben

  • Interactions among factors affecting stillbirths in Holstein cattle in the United States.

    C.L. Meyer;P.J. Berger;K.J. Koehler

  • Factors Affecting Milk Yield and Reproductive Performance

    Unknown

  • Genetic aspects of lactation curves.

    R.D. Shanks;P.J. Berger;A.E. Freeman;F.N. Dickinson

  • Effect of Selection for Milk Production and General Health of the Dairy Cow

    R.D. Shanks;A.E. Freeman;P.J. Berger;D.H. Kelley

  • Factors affecting dystocia and early calf mortality in Angus cows and heifers.

    P J Berger;A C Cubas;K J Koehler;M H Healey

  • Variances, repeatabilities, and age adjustments of yield and fertility in dairy cattle.

    Leslie B Hansen;A. E. Freeman;P. J. Berger

  • Effects of Previous Days Open, Previous Days Dry, and Present Days Open on Lactation Yield

    D.A. Funk;A.E. Freeman;P.J. Berger

  • Twinning rates for North American Holstein sires.

    J.M. Johanson;P.J. Berger;B.W. Kirkpatrick;M.R. Dentine

  • Profitability in Daughters of High Versus Average Holstein Sires Selected for Milk Yield of Daughters

    J.A. Bertrand;P.J. Berger;A.E. Freeman;D.H. Kelley

  • Relationship of Reproductive Factors with Interval and Rate of Conception

    R.D. Shanks;A.E. Freeman;P.J. Berger

  • Association of heifer fertility with cow fertility and yield in dairy cattle.

    L.B. Hansen;A.E. Freeman;P.J. Berger

  • Evaluation of a Linear Type Program in Holsteins

    J.R. Thompson;A.E. Freeman;D.J. Wilson;C.A. Chapin

  • Reporting of dystocia scores and effects of dystocia on production, days open, and days dry from dairy herd improvement data.

    M. Djemali;A.E. Freeman;P.J. Berger

  • A Bayesian threshold-linear model evaluation of perinatal mortality, dystocia, birth weight, and gestation length in a Holstein herd1

    J.M. Johanson;P.J. Berger;S. Tsuruta;I. Misztal

  • Genetic relationship between calf livability and calving difficulty of Holsteins.

    Mario L. Martinez;A.E. Freeman;P.J. Berger

Frequent Co-Authors

Roger D. Shanks
Roger D. Shanks University of Illinois at Urbana-Champaign
Rodger K. Johnson
Rodger K. Johnson University of Nebraska–Lincoln
Thomas J. Baas
Thomas J. Baas Iowa State University
Michael D. Tokach
Michael D. Tokach Kansas State University
O. W. Robison
O. W. Robison North Carolina State University
Kent A. Weigel
Kent A. Weigel University of Wisconsin–Madison
Kenneth J. Stalder
Kenneth J. Stalder Iowa State University
R.K. Miller
R.K. Miller Texas A&M University
Ignacy Misztal
Ignacy Misztal University of Georgia

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