prevalence – Swine in Minnesota

Measures of disease occurrence review

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.

Get re-acquainted with a few of the MSHMP epidemiologic tools! Marcello Melini, Mariana Kikuti, Miranda Medrano, Emily Geary, and Cesar A Corzo of the University of Minnesota review some of the graphic representations used in their weekly reports.

Prevalence comparison among different MSHMP cohorts

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.

University of Minnesota researchers Mariana Kikuti, Miranda Medrano, Marcello Melini, Carles Vilalta, Juan Sanhueza, Emily Geary, Cesar Corzo compare PRRSV disease status between systems that originally shared their sow herd status with MSHMP and those that joined the program later.

Review of MSHMP PRRS Chart 2 ‐ Prevalence.

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.

Key Points:

Chart 2 depicts the prevalence (e.g. the proportion of breeding herd in each of the PRRS status categories over time).
Since 2013, the proportion of farms that vaccinate (2vx) and that use field virus (2fvi) has not changed dramatically.
The cyclical pattern of farms in status 1 observed early in the program is slowly disappearing after 2019.

Senecavirus A continues to be present in the United States swine herd

This week, Dr. Guilherme Preis, graduate student at the University of Minnesota with Drs. Corzo and Vannucci is sharing an update on the prevalence of Senecavirus A in the United States.

Key Points

Senecavirus A continues to present in the US at low levels.
Sow herds are more likely to test positive than growing pig herds.
SVA positive herds tend to have a large number of positive samples.

Detection of PRRSV RFLP type 1-7-4 over time

This week, Dr. Mariana Kikuti from the MSHMP team shares information about the PRRS RFLP type 1-7-4 prevalence in the MSHMP data.

Key Points

PRRSV RFLP type 1-7-4 was first identified in our MSHMP dataset in 2003.
An increasing trend up to 2014 has been observed and is now on a decreasing trend.