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Web-based PRRS Risk Assessment

The American Association of Swine Veterinarians (AASV) Production Animal Disease Risk Assessment Program (PADRAP) was initiated in 2006.  Iowa State University College of Veterinary Medicine, Food Supply Veterinary Medicine provides program coordination to develop, manage and promote disease risk assessment tools and databases of completed risk assessments held by AASV. 

What is PADRAP?

Production Animal Disease Risk Assessment Program (PADRAP) is an epidemiologically-based initiative to help producers and veterinarians manage disease risks faced by North American swine industry.  It offers a set of risk assessment surveys and reports for measuring and benchmarking disease risks.  There are currently two risk assessments available within PADRAP:

  • PRRS Risk Assessment for the Breeding Herd
  • PRRS Risk Assessment for Growing Pig Herd

Key Features of PADRAP?

The web-base application allows trained veterinarians to submit completed assessments for swine sites and immediately view risk benchmarking reports. Veterinarians can also create and send links to reports to clients or production personnel for viewing or printing. Additional features include the ability to prink surveys so that assessments may be completed off-line. A time saving feature allows veterinarians to complete multiple assessments simultaneously. This feature is particularly useful when assessing multiple site within the same production system where the answers to many of the questions may be the same for all breeding herd or growing pig sites. Another time saving feature allows previously completed assessments to be duplicated and used as the basis for newly completed assessments. This feature is particularly useful when surveys are repeated over time for the same swine site or when surveys are being completed for multiple swine sites that share many of the same operational links, such as transportation of live animals.

Results – Benchmarking Reports

PADRAP Online allows trained veterinarians to submit assessments for sites and immediately view and print benchmarking reports. 

An example of a Risk Quadrant Report is shown below.  Each dot on the Risk Quadrant Report is the average internal (bio-management of virus already present) and external risk (bio-exclusion of virus not present) index scores for a given site.  The red dots represent the production system of interest and blue dots represent the most current survey for all other sites assessed in the database.  

padrap risk quadrant report
Risk Quadrant Report
Average Internal and External Risk Index scores for an individual site (red dot) are compared to all sites in the PADRAP database (blue dots)

PADRAP Plays a Role is SVA Outbreak Investigations


Why the sudden and more wide-spread resurgence of Senecavirus A (SVA)?  Are there common risk factors that may increase risk of infection? What are the most common gaps in biosecurity that may have led to the introduction of this disease on a farm?  Is there a way we can gather consistent, real-time information and respond quickly to an emerging or transboundary disease threat to the United States swine industry?  These are a few of the questions the Outbreak Investigation Program is trying to answer.  The program was originally funded by the Iowa Pork Producers Association (IPPA) and more recently the National Pork Board (NPB) and the Swine Health Information Center (SHIC).  The program began in summer 2013 with porcine reproductive and respiratory syndrome virus (PRRSV), was quickly adapted for porcine epidemic diarrhea virus (PEDV), and now is being utilized with SVA cases.

PADRAP served as the backbone for the development of the standard investigation forms and summary reports used in the outbreak investigations.  These forms ensure data is collected in a uniform manner suitable for aggregate analysis.  Similar to the PRRS Risk Assessment for the Breeding Herd in PADRAP, the SVA outbreak investigation form collects basic information about the herd, premises, and current SVA outbreak.  The form also includes a set of standard questions about a comprehensive set of possible risk events and the carrying agents associated with them.
To conduct the investigation, an outbreak investigation facilitator and coordinator deploy to meet with the herd veterinarian and farm personnel.  The SVA outbreak investigation form is used as a guide for an open ended discussion about the case and the events that occurred in the four weeks prior to the first observation of clinical signs.
After the outbreak investigation team meets with the herd veterinarian and farm personnel, the coordinator composes a summary report.  Events that occurred on the site in the four weeks prior to the outbreak are assigned a qualitative risk level based on farm attributes, layers of biosecurity currently in place, overall frequency of events and the inherent risk of the events themselves.  The summary then highlights the events most likely to have introduced SVA into the farm so that gaps in biosecurity are more easily flushed out.

PADRAP is a host website and database warehouse that currently offers 2 risk assessments for PRRS – one for breeding herds and one for growing pig herds.  The intention is for it to eventually house risk assessments for other swine diseases, stages of production and even other species.  The outbreak investigation forms and summary are currently populated manually but in the future may be automated and delivered online using PADRAP which will make it an easily accessible resource for the SHIC, NPB, American Association of Veterinarians (AASV) and other industry stakeholders in the event of endemic, emerging, or transboundary disease outbreaks.

Contact Information

For more information:

To enroll for training, please email or call the AASV office at 515-465-5255.  Membership in the American Association of Swine Veterinarians is required.  Associate members are also eligible.

Ongoing financial support for the program is provided by the AASV, National Pork Board, Boehringer-Ingelheim Vetmedica Inc, Harrisvaccines Inc and Newport Laboratories.