Abstract: Estimating Transmission Dynamics of African Swine Fever Virus from Experimental Studies

Jan 09, 2023

Abstract: Estimating transmission dynamics of African swine fever virus from experimental studies

African swine fever virus (ASFV) continues to spread across the world, and currently, there are no treatments or vaccines available to combat this virus. Reliable estimates of transmission parameters for ASFV are therefore needed to establish effective contingency plans. This study used data from controlled ASFV inoculations of pigs to assess the transmission parameters. Three models were developed with (binary, piecewise-linear and exponential) time-dependent levels of infectiousness based on latency periods of 3-5 days derived from the analysis of 294 ethylenediamine tetraacetic acid-stabilized blood samples originating from 16 pigs with direct and 10 pigs with indirect contact to 8 inoculated pigs. The models were evaluated for three different discrete latency periods of infection. The likelihood ratio test showed that a binary model had an equally good fit for a latency period of 4 or 5 days as the piecewise-linear and exponential model. However, for a latency period of 3 days, the piecewise-linear and exponential models had the best fit.

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Video: Same Grit, New Name: A Conversation with Ryan Calistro of Bower Ag

Swine Leaders Live, we sit down with Ryan Calistro, President of Bower Ag, to discuss a major brand transition in the ag construction and solutions space—and what it means for swine producers. Bower Ag represents a new, unified identity, bringing together Ag Property Solutions, Dairy Specialists, and The Dairy Solutions Group under one name. But as Ryan explains, this isn’t about change for the sake of change—it’s about strengthening what already works and delivering more value to producers.

We dive into:

• What Bower Ag is and why the transition was made

• What stays the same for longtime customers

• How combining multiple businesses creates new opportunities for producers

• What today’s producers are asking for—and how Bower Ag is responding

• Key insights heading into World Pork Expo

If you’ve worked with APS before—or are evaluating partners for your next project—this conversation provides a clear look at where Bower Ag is headed and how they’re positioning themselves for the future.