The Indiana State Board of Animal Health reports that a flu like virus affecting pigs has infected farms in at least 43 Indiana counties.
26 other states have also reported cases of the virus that forces producers to wean piglets as young as 8 days old from sick sows.
The animals usually recover.
The virus became prevalent a little more than a year ago.
The disease has caused pork prices to soar to $112 per hundred weight as compared to $88 a year ago.