1-4-4 – Swine in Minnesota

Tracing the evolutionary history of the novel PRRSV-2 L1C-1-4-4 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.

This Friday we are looking at the PPRSv L1C-1-4-4 variant and comparing its evolution to other PRRSv strains, thanks to research by Nakarin Pamornchainavakul, Mariana Kikuti, Igor A. D. Paploski, Dennis N. Makau, Albert Rovira, Cesar A. Corzo, and Kimberly VanderWaal.

Experimental pig study confirms the high virulence of the recently emerged PRRSV 1-4-4 L1C variant strain

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.

In today’s Science Page we learn about the findings of a study conducted by researchers at Iowa State University inoculating pigs with the 1-4-4 L1C variant.

Environmental contamination assessment in farms undergoing an outbreak with PRRS 1-4-4 Lineage 1C

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 Morrison Swine Health Monitoring Project take a look at whether PRRSv cases associated with the linage 1C, RFLP 1-4-4 variant can be detected in the outside areas of farms undergoing an outbreak.

Key Points

There is little understanding of contributing factors aiding the 1-4-4 L1C PRRSv rapid transmission and biosecurity breaches
Environmental detection in recently infected farms was possible although detection was low
Most positive samples originated from exhausting fans, showing the virus may exit a positive barn via that route

Updated epidemiological curve of cases associated with the new 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.

This Friday the Morrison Swine Health Monitoring Project shares an update on their continued monitoring of PRRSv cases associated with the linage 1C, RFLP 1-4-4 variant.

How many cases are we seeing of the new PRRS 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 provide an update of the epidemiological curve of cases associated with this variant.