Updated epidemiological curve of cases associated with the new PRRS Lineage 1C RFLP1-4-4 variant

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

As the MSHMP team continues to monitor the detection of the newly described PRRSv Lineage 1C RFLP 1-4-4 variant, they are updating the epidemiological curve of cases associated with this variant.

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Post-epidemic dynamics of PEDV in the United States: Current trends and patterns

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

This week, the MSHMP team is sharing what they are observing regarding Porcine Epidemic Diarrhea virus in the US. What are the trends and patterns emerging years after the epidemic?

Main Points 

  • Since July 2014, the number of PEDV yearly outbreaks reduced both numerically and in geographical distribution.
  • PEDV outbreaks occur seasonally, with most cases being detected during winter.
  • Spatial-temporal clusters of PEDV outbreaks were detected, most of which occurred prior to 2019.

Porcine epidemic diarrhea (PED) is a swine enteric viral disease first documented in the U.S. swine population in 2013, at which time it sparked a major epidemic. Since then, PEDV has persisted in the U.S. breeding herd with low incidence during the post-epidemic period. Despite continued monitoring and surveillance, there is minimal research and understanding of the endemic phase of PEDV in the country. Our objective was to characterize PEDV in the U.S. breeding herd in the post epidemic period (spatial-temporal distribution of cases and associated factors). 

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MSHMP data collection update 2020-2021

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Reaching the end of the fiscal year, we wanted to report an update on the magnitude of the MSHMP project by describing the data collected and maintained in the MSHMP database that is used to create our reports and to analyze industry related questions and trends.

Breakdown of MSHMP Participants: 37 separate systems made up of 3 regional projects and 31 Production companies and veterinary clinics. Three companies are represented by multiple MSHMP systems due to geographic and management considerations. 

There are a total of 2,073 farms within the program, 1,168 breeding herds, 872 growing pig farms and 30 boar studs. The total number of sows monitored in our project is 3,503,287 sows (>3.5 million sows)

The average number of breeding herd per system is 32 (min of 5 and max of 239) with the 50% of the systems having 18 farms or more.

The mean inventory per farm by system (excluding finisher farms) was 2916 sows (ranging those means from 700-6500). Figure 1 shows farm’s average inventory distribution per participant system.

Different production types are recorded with 56% of breeding herds, and 38% represented by wean to finish and finisher farms from four participant systems (Table1). 

Approximately 20 % of the sow farms are filtered, with 50 being not filtered, 27 partially filtered (filtered only during certain months of the year), and 167 filtered year-round. We are collecting information on the type of filtration system (i.e. positive/negative). Approximately 20% of the farms have reported it, with most of them using positive filtration. 

At MSHMP we are currently collecting status for three pathogens causing important impact to the industry. Over the 2020-2021 year, 1056, 1176, and 1170 farms reported status for PRRS, PED, and PDCoV respectively. Farm status regarding Mycoplasma was recorded for eight production systems, comprising 106 sow farms.

We would like to thank all MSHMP participants for the willingness to share your information. Without their contributions, we could not generate these summaries.

MSHMP: Incidence Year 2020 / 2021 Annual Summary

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

The 2020-2021 MSHMP incidence year again brought us unexpected events and chances to learn. We were able to meet these challenges only because you as an MSHMP participants continue to share your data. We would like to provide a general update and summary of where we are at this point.

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Morrison Swine Health Monitoring Project: Annual Summary (2019/2020)

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

Another MSHMP year has gone by and certainly will be one to remember due to the public health emergency leading to a crisis in our industry. Today, Dr. Cesar A Corzo provides comprehensive 2019/2020 concluding remarks and project updates. Thank you to all MSHMP participants for continuing to communicate and report status changes!

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