Publications by authors named "Derald Holtkamp"

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The impact of the timing of PRRSV and swine enteric coronaviruses introduction on wean-to-market productivity.
Kate Dion, Daniel Linhares, Gustavo S Silva, Edison Magalhães, Derald Holtkamp

Prev Vet Med· January 2026

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Leveraging productivity indicators for anomaly detection in swine breeding herds with unsupervised learning.
Mafalda Pedro Mil-Homens, Chong Wang, Giovani Trevisan, Fernanda Dórea, Daniel C L Linhares, Derald Holtkamp

Front Vet Sci· December 2025

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Economic impact of productivity losses attributable to porcine reproductive and respiratory syndrome virus in United States pork production, 2016-2020.
Onyekachukwu Osemeke, Gustavo S Silva, Cesar A Corzo, Mariana Kikuti, Sarah Vadnais, Derald Holtkamp

Prev Vet Med· November 2025

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Assessment of the Relationship Between Bioexclusion Practices Applied in Wean-to-Harvest Sites and PRRS Outbreaks.
Mariah Musskopf, Tina Peterson, Isadora Machado, Thinh Tran Pham Tien, Elly Kirwa, Derald J Holtkamp

Vet Sci· October 2025

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Development of Benchmark Curves to Early Detect Health-Related Productivity Deviations Using Production Indicators in Swine Nursery and Finishing Lots.
Mafalda Pedro Mil-Homens, Ximena Paz Portal, Edison Magalhaes, Tyler Holck, Joel Stave, Derald Holtkamp

Transbound Emerg Dis· August 2025

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Post-outbreak dynamics and persistence of Actinobacillus pleuropneumoniae serotype 15 in finisher pigs in Iowa.
Marcelo Nunes de Almeida, Pablo P Pineyro, Derald Holtkamp, Isadora Machado, Ana P S Silva

Vet Res· May 2025

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Early Detection of PRRSV Outbreaks in Breeding Herds by Monitoring Productivity and Electronic Sow Feed Data Using Univariate and Multivariate Statistical Process Control Methods.
Mafalda Pedro Mil-Homens, Swaminathan Jayaraman, Kinath Rupasinghe, Chong Wang, Giovani Trevisan, Derald Holtkamp

Transbound Emerg Dis· April 2025

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PRRSV-2 variant classification: a dynamic nomenclature for enhanced monitoring and surveillance.
Kimberly VanderWaal, Nakarin Pamornchainavakul, Mariana Kikuti, Jianqiang Zhang, Michael Zeller, Derald J Holtkamp

mSphere· February 2025

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Development of a pig wean-quality score using machine-learning algorithms to characterize and classify groups with high mortality risk under field conditions.
Edison S Magalhães, Danyang Zhang, Cesar A A Moura, Giovani Trevisan, Derald J Holtkamp

Prev Vet Med· November 2024

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Characterizing best practices for tonsil-oral-scrubbing (TOSc) collection for PRRSV RNA detection in sows.
Peng Li, Ana Paula Poeta Silva, Hao Tong, Paul Yeske, Laura Dalquist, Derald J Holtkamp

Porcine Health Manag· October 2024

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Assessment of temperature and time on the survivability of porcine reproductive and respiratory syndrome virus (PRRSV) and porcine epidemic diarrhea virus (PEDV) on experimentally contaminated surfaces.
Mafalda Mil-Homens, Ethan Aljets, Rodrigo C Paiva, Isadora Machado, Guilherme Cezar, Derald Holtkamp

PLoS One· January 2024

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Utilizing productivity and health breeding-to-market information along with disease diagnostic data to identify pig mortality risk factors in a U.S. swine production system.
Edison S Magalhães, Jeff J Zimmerman, Pete Thomas, Cesar A A Moura, Giovani Trevisan, Derald J Holtkamp

Front Vet Sci· January 2024

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Field Implementation of Forecasting Models for Predicting Nursery Mortality in a Midwestern US Swine Production System.
Edison S Magalhaes, Danyang Zhang, Chong Wang, Pete Thomas, Cesar A A Moura, Derald J Holtkamp

Animals (Basel)· July 2023

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The Impact of PRRS Eradication Program on the Production Parameters of the Hungarian Swine Sector.
István Szabó, Imre Nemes, László Búza, Ferenc Polyák, Ádám Bálint, Derald J Holtkamp

Animals (Basel)· May 2023

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Slaughterhouse Visual and Palpation Method for Estimating the Economic Damage of Porcine Proliferative Enteropathy (PPE).
István Szabó, István Makkai, Péter Máté, Tamás Molnár, Hanny Swam, Derald J Holtkamp

Animals (Basel)· February 2023

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Considerations in the use of processing fluids for the detection of PRRSV RNA and antibody.
Will López, Jeff Zimmerman, Phil Gauger, Karen Harmon, Ronaldo Magtoto, Derald Holtkamp

J Vet Diagn Invest· September 2022

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Interpretable machine learning applied to on-farm biosecurity and porcine reproductive and respiratory syndrome virus.
Abagael L Sykes, Gustavo S Silva, Derald J Holtkamp, Broc W Mauch, Onyekachukwu Osemeke

Transbound Emerg Dis· July 2022

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Comparison of virus detection, productivity, and economic performance between lots of growing pigs vaccinated with two doses or one dose of PRRS MLV vaccine, under field conditions.
Cesar A A Moura, Reid Philips, Gustavo S Silva, Derald J Holtkamp, Daniel C L Linhares

Prev Vet Med· July 2022

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Whole-herd risk factors associated with wean-to-finish mortality under the conditions of a Midwestern USA swine production system.
Edison S Magalhães, Jeffrey J Zimmerman, Pete Thomas, Cesar A A Moura, Giovani Trevisan, Derald J Holtkamp

Prev Vet Med· January 2022

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Disinfection and conditions associated with thermo-assisted drying and decontamination inconsistently produce negative PRRSV rRT-PCR results on metal surfaces.
Rita Anne Neat, Zhang Jianqiang, Hai Hoang, Lauren McKeen, Christine L Mowrer, Derald J Holtkamp

Vet Microbiol· November 2021

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Next Generation of Voluntary PRRS Virus Regional Control Programs.
Edison S Magalhães, Jeffrey J Zimmerman, Derald J Holtkamp, Dyneah M Classen, Douglas D Groth

Front Vet Sci· November 2021

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Probability of PRRS virus detection in pooled processing fluid samples.
Will A López, Phillip C Gauger, Karen M Harmon, Derald J Holtkamp, Jean Paul Cano

Vet Microbiol· October 2021

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Efficacy of ultraviolet C exposure for inactivating Senecavirus A on experimentally contaminated surfaces commonly found on swine farms.
Chelsea Ruston, Jianqiang Zhang, Jenna Scott, Min Zhang, Katyann Graham, Derald Holtkamp

Vet Microbiol· May 2021

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Association of wild-type PRRSV detection patterns with mortality of MLV-vaccinated growing pig groups.
Cesar A A Moura, Reid Philips, Gustavo S Silva, Alejandro Ramirez, Phillip C Gauger, Derald J Holtkamp

Prev Vet Med· April 2021

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Machine-learning algorithms to identify key biosecurity practices and factors associated with breeding herds reporting PRRS outbreak.
Gustavo S Silva, Gustavo Machado, Kimberlee L Baker, Derald J Holtkamp, Daniel C L Linhares

Prev Vet Med· November 2019

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