swine – Page 67 – Swine in Minnesota

PRRS EWMA Analysis 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.

Today, Dr. Vilalta and other members of the MSHMP team review the characteristics of the Exponential Weighted Moving Average (EWMA) charts for PRRS.

Key Points:

The EWMA chart is a smoothed chart of the percentage of farms that are breaking.
This chart is useful for tracking longitudinal data and for detecting the signals that indicate an “event”.

There is a Need for National Influenza Surveillance in Swine

In today’s post, we would like to highlight the value of flu surveillance in swine as well as to acknowledge the University of Minnesota Veterinary Diagnostic Laboratory (UMN-VDL) as a long-standing and committed contributor to the USDA Voluntary Influenza A Virus (IAV) in Swine Surveillance program. Thanks to this surveillance program, the U.S. swine industry has ample information available for analysis and to support influenza-related research, vaccinology and diagnostics.

The objectives of the USDA Voluntary IAV in Swine Surveillance program are:

Monitor genetic evolution of endemic influenza in swine to better understand endemic and emerging influenza virus ecology.
Make available influenza isolates for research and to establish an objective database for genetic analysis of these isolates and related information.
Select proper isolates for the development of relevant diagnostic reagents, updating diagnostic assays, and vaccine seedstock products.

Meet the Leman Keynote Speakers!

The full Allen D. Leman Swine Conference program details are now available! Check here the programs for Monday, September 21 and Tuesday, September 22. You can link to the preconference program too.

Enjoy listening to our keynote lecturers! Fom the impacts of COVID-19 on the swine industry to strategies designed to capture value from the farm to the table. An event not to be missed! Register by August 30 for a discounted rate.

Incidence Risk and Incidence Rate: an Overview

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.

Today, Dr. Juan Sanhueza helps us understand better two epidemiologic concepts: the incidence risk and incidence rate.

Key Points

Incidence risk is a measure of disease occurrence over a defined period of time. It is a proportion, therefore takes values from 0 to 1 (0% to 100%)
Incidence rate takes into account the time an individual is at risk of disease. It is not a proportion since it defines the number of cases per animal or farm time at risk.
Incidence risk and incidence rate are often confused. Incidence risk and rate are numerically the same when the period at risk does not vary across individuals being studied.

Use of test and removal strategy to contain an ASFV outbreak in a farm

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.

Today, Dr. Yao and collaborators from PIC, New Hope Liuhe, and University of Cambridge describe the implementation of a test and removal strategy on an African Swine Fever virus (ASFV) infected farm, highlighting the importance of early detection and rapid responses to contain the virus in a population.