Tap to download the app
X
Share
X

REPORTS

Collect articles and features into your own report to read later, print or share with others

Create a New Report

Favorites

Read Later

Create a new report

Report title (required) Brief description (optional)
CREATE
X
NEXT
PORK POULTRY
follow us


You must be logged in to edit your profile.

Favorites Read Later My Reports PHT Special Reports
Pig Health Today is equipped with some amazing (and free) tools for organizing and sharing content, as well as creating your own magazines and special reports. To access them, please register today.
Sponsored by Zoetis

Pig Health Today | Sponsored by Zoetis

.
Featured Video Play Icon

Print

Positive-pressure ventilation makes a comeback to reduce PRRS transmissions

Watch the interview

A ventilation system that fell out of favor when it caused deterioration in swine buildings is making a comeback.

Producers looking for ways to reduce porcine reproductive and respiratory syndrome (PRRS) find positive-pressure ventilation with some modifications works well now, especially in older building, according to Aaron Lower, DVM, Carthage Veterinary Clinic, Carthage, Iowa.

“For a period of time, we controlled swine barns through positive-pressure ventilation,” Lower said.

Fans blew air into the barn and air escaped through special outlets. These systems were easy to manage and air distribution was excellent. However, warm, humid air could move into an attic or other dead areas and cause building deterioration.

Producers had no choice but to return to negative-pressure ventilation systems where fans create a slight vacuum in the barn to draw air in through special inlets, he explained.

PRRS changed ventilation

Then PRRS arrived and the swine industry needed new ways to manage this costly virus. One option was a system to filter incoming air and minimize PRRS outbreaks. The system was proven effective in reducing PRRS transmissions, Lower told Pig Health Today.

However, in an older barn with leaks and cracks, it was impossible to expect 100% of the air to enter through the filters, he explained. “But if you turn it around and push filtered air into the barn, the leaks and cracks don’t matter because air is pushing out of the barn.”

It still is a “little risky” putting a positive-pressure ventilation system in new construction, Lower added. But new designs address past problems. All areas including attic spaces are positive pressure to prevent dirty air from entering and deteriorating building trusses. New, fully sealed building materials are used for sidewalls to reduce damage from dust and humidity.

Expensive upgrades

The cost to add an air filtration system is $75 to $90 per sow plus long-term recurring costs of $1 to $2 per sow for changing filters, etc., according to Lower.

Upgrading the entire ventilation system costs $100 to $300 per sow, depending on the age of the facility. Because ventilation upgrades are expensive, producers usually upgrade only sow farms, he said.

Investment in an upgraded ventilation system with filtration can pay for itself over time, depending on the frequency of PRRS outbreaks.

“If a sow farm has a PRRS break history of every 3 to 5 years, then the return is good enough to go ahead and spend the money to filter those farms,” Lower said.

The effectiveness of a filtration system on a ventilation system is being studied on several large-scale projects. Lower said early indications suggest farms are five to eight times less likely to break with PRRS if filtration is added.

“And if you have a good ventilation system, it makes my job a lot easier,” he quipped.

 

 


tags: , , ,
RELATED NEWS
  • Porcine Reproductive and Respiratory Syndrome control in Asia

    by Marlon L. Linatoc Regional Technical Manager Swine Asia-Pacific and Greater China, Zoetis Inc.    Porcine Reproductive and Respiratory Syndrome (PRRS) continues to be one of the most economically devastating viral diseases affecting pig farms in major swine...

  • Sampling oral fluids for PRRS

    Oral-fluid sampling can provide a simple, reliable way to surveil for porcine reproductive and respiratory syndrome virus (PRRSV), Maria Rotolo, DVM, of Iowa State University, reported at the 2017 AASV conference.

  • Solve biosecurity overload by focusing on the basics

    Keeping a hog farm free of pathogens can be a daunting task for producers. The process to evaluate potential risks and then undertake biosecurity measures to manage the risks has become complex. In fact, the complexities of biosecurity are so great that some producers...

  • Feed biosecurity must address risk of PEDV transmission

    The biosecurity of swine feed is important for producing healthy animals and safe pork. But until 2013, feed was considered a low-risk vehicle for transmitting viral pathogens to swine.




You must be logged in to edit your profile.

Google Translate is provided on this website as a reference tool. However, Poultry Health Today and its sponsor and affiliates do not guarantee in any way the accuracy of the translated content and are not responsible for any event resulting from the use of the translation provided by Google. By choosing a language other than English from the Google Translate menu, the user agrees to withhold all liability and/or damage that may occur to the user by depending on or using the translation by Google.