Disease Monitoring

Disease Detection (Monitoring and Surveillance Systems)

This section includes information on studies/projects for pathogen (and/or disease) monitoring and surveillance systems.

For macro-epidemiological aspects of pathogen detection and/or disease incidence, follow the links below and please visit the SDRS page.

TitleLinks to materials
Swine Disease Reporting System (aggregated data from 4 major VDLs): reporting, and detecting changes in patterns over time, age group, region, specimens, and pathogen sub-type.> Trevisan et al., Procedures for VDL data standardization. JVDI 2021
> Trevisan et al. Prediction of seasonal patterns of PRRSv detection in the US. JVDI 2020.
> Trevisan et al. Macroepidemiological aspects of PRRSV detection over time, age group, and sample type. Plos One 2020.
> Linhares et al. Summary SDRS findings. 2019 OASV (Collingwood, Ontario).
> Trevisan. Summary and implication of SDRS results. 2019 McKean conference.
> Trevisan 2019. Aggregating results and summarizing findings from multiple VDLs on a near real-time basis. AAVLD annual meeting. Providence, RI.
> Trevisan 2019. Disease detection at a veterinary diagnostic laboratory based on diagnostician interpretation and diagnostic codes. AAVLD annual meeting. Providence, RI.
> Linhares et al., 2019 Mexico. Macro-epidemiological aspects of major pathogens affecting the US swine industry.
> Trevisan et al., 2019 AASV poster: Cyclic regression models for PRRS, PED, Delta
> Trevisan et al., 2018 Leman Pre-Conference slides Trevisan et al., 2018 ISU James McKean conference slides.
> Monthly reports available here
> Online dashboards available here
Mycoplasma hyopneumoniae detection by PCR:> Rawal et al., Patterns of Mycoplasma hyopneumoniae detection by PCR in cases submitted to the ISU-VDL from 2004-2016 AASV 2018
> Rawal et al., Patterns of Mycoplasma hyopneumoniae detection by PCR in cases submitted to the ISU-VDL from 2004-2016 JSHAP 2018.
Ecology of type I PRRSv in Europe> Torrents et al., 2018 AASV meeting.
> Torrents et al., PRRSv classification of breeding herds in Spain. Porcine Health Management 2019
> Torrents et al., Effect of PRRSv status on productivity in Spain. Porcine Health Management 2019
Dynamics of PRRS virus type I and II detection in growing pigs raised in high pig density area in the US.> Trevisan et al. 2020 AASV: genetic diversity PRRSV RFLP within and between US states during 2007-2019.
> Moura et al. 2019 ISU McKean Swine Disease Conference. 
> Moura et al., Impact of timing of infection (early, mid, late finishing) on mortality. 2019 AASV conference
> Moura et al., Effect of frequency of wild-type detection and/or viral diversity on wean to finish mortality. 2019 Leman conference.
Genetic diversity of main PRRS RFLP types in the US swine industry.> Trevisan et al., Genetic diversity of RFLP types within and between US states. 2019 Leman conference.

For information on monitoring and surveillance strategies to detect pathogens or diseases:

TitleLinks to materials
Oral fluids-based sampling at the slaughter plant
> Almeida et al. 2016 ISU James McKean conference slides
> Almeida et al. 2017 NHF
> Almeida et al. 2018 Prev Vet Med: Assessment of abattoir based monitoring of PRRSV using oral fluids. Preventive Veterinary Medicine 2018.
> Almeida et al. 2018 AASV annual meeting (Monitoring and Surveillance Systems workshop)
Processing fluids: series of studies from lab to the field: PRRS / PED / PCV2


> Lopez et al., 2021 Vet Micro paper: Probability of detecting PRRSv in pooled PF samples.
> Lopez et al. 2020 AASV: Detecting PRRSV antibodies with IDEXX ELISA on PF.
> Trevisan et al. 2020 AASV: Classifying piglet batches to PRRSV, PCV2, and detecting PDCoV, and SVA.
> Lopez et al. 2019 AASV: Dilution effect of PF.
> Lopez et al. 2017 JSHAP paper: PRRS monitoring using PF.
> Lopez et al., 2018 National Hog Farmer: Monitor herds for PRRS using processing-fluids samples.
> Linhares et al., 2018 Leman Conference slides
> Lopez et al., 2018 Leman conference poster
> Lopez et al., 2018 ISU McKean conference: pooling effect
> Trevisan et al. 2018 McKean workshop: PF applications.
> Trevisan, Robbins, et al. 2018 NHF: Processing fluid PCR for PRRSV may help sort for performance.
> Lopez et al. 2018 NHF: Pooling PF may increase probability of PRRS virus detection by qPCR.
Family oral fluids (FOF) for PRRSv detection in due-to-wean pigs


> Almeida et al., Longitudinal sampling with PF and FOF in herds undergoing elimination. Prev Vet Med 2021
> Almeida et al., Collecting oral fluids and family oral fluids from suckling piglets. Prev Vet Med 2021
> Almeida et al., FOF versus serum for PRRSv detection in due-to-wean litters. Prev Vet Med 2021
> Linhares et al. 2018 Leman Conference: monitoring PRRSV
> Almeida et al. 2018 AASV: Monitoring PRRSV at low prevalence in suckling pigs
> Almeida et al. 2018 McKean Workshop: FOF applications
> Almeida et al. 2018 ISU McKean Conference: summary field studies on FOF
> Almeida et al. Instructions to collect FOF under field conditions
SPC-based monitoring in breeding herdsAutomated, ongoing monitoring of production data


> Silva et al. 2017 Prev Vet Med: Monitoring breeding herd production data to detect PRRSV outbreaks
> Silva et al. 2018 AASV annual meeting: SPC for breeding herds.

> Click here for a link to this project’s website with live data
Genetic diversity of PRRS virus> Trevisan et al., Genetic diversity over time and space based on RFLP typing. JVDI 2021
> Trevisan et al., Full genome of highly pathogenic PRRSv strain affecting the US swine industry between 2020 and 2021: the 1-4-4 Lineage 1C variant strain.