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.

Click here to see more...

Video: Heat Stress Killing Profits? - Dr. Jeff Hansen

In this episode of The Swine Nutrition Blackbelt Podcast, Dr. Jeff Hansen from Elanco shares practical strategies to reduce heat stress in grow-finish pigs. He discusses how rising temperatures affect feed intake, growth, and carcass quality, and explains how nutritional tools, such as Skycis, and environmental adjustments can help maintain performance during high-stress periods.

Listen now on all major platforms! "Technologies that reduce heat or metabolic stress in pigs deliver the greatest value during summer, when growth is challenged and profit potential is highest.

" Meet the guest: Dr. Jeffrey Hansen / jeff-hansen-00b72322 is a Swine Technical Consultant at Elanco Animal Health. He holds a Ph.D. in Swine Nutrition from Kansas State University, along with degrees in Animal Science and Nutrition from Texas A&M University. With a passion for pork fat quality, feed management, and production efficiency, Dr. Hansen brings decades of swine nutrition and technical expertise to the industry.