Sign up now!
Don't show this again
Download the report!Continue to Site >
or wait 7 secs

Thank you for confirming your subscription!

(And remember, if ever you want to change your email preferences or unsubscribe, just click on the links at the bottom of any email.)

We’re glad you’re enjoying Pig Health Today.
Access is free but you’ll need to register to view more content.
Already registered? Sign In
Tap to download the app


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

Create a New Report


Read Later

Create a new report

Report title (required) Brief description (optional)
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

Taking oral-fluid samples for PRRS: How many and when?

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

Rotolo and colleagues came to this conclusion based on a research project they conducted using a statistical tool known as spatial autocorrelation. Spatial autocorrelation, in simplest terms, means everything is related to everything else, but near things are more related than distant things, Rotolo explained in an interview with Pig Health Today after her presentation.

For the pork industry, this would mean that pigs in pens near each other are more likely to have the same disease status than pens that are farther apart, she said.

The investigators also determined if it’s better to collect samples for PRRSV testing that are equal distances from each other — a process known as fixed-spatial sampling — versus collecting samples from random locations throughout a barn, she said.

For their research project, Rotolo and colleagues collected oral-fluid samples in three wean-to-finish barns weekly from 108 pens with about 25 pigs per pen. In all, they had 972 samples, which were completely randomized, then tested for PRRSV with reverse transcription polymerase chain reaction. They used statistical analyses to compare the probability of detection based on random versus fixed-spatial sampling.

They found that PRRSV did indeed exhibit spatial autocorrelation and that oral sampling using fixed sampling was an effective strategy that can provide a good representation of what’s going on in a barn.

Oral-fluid sampling, she added, is a particularly attractive sampling method because it’s easy to perform and takes only one person. In contrast, collecting serum samples requires two people — one to restrain the animal and another to collect the sample — which also increases labor costs, Rotolo said.

Posted on September 18, 2017

tags: , ,

You must be logged in to edit your profile.

Share It
Eliminating porcine reproductive and respiratory syndrome virus (PRRSV) from pigs might not yet be possible, but monitoring tools could help refine a herd's PRRSV stability.

Click an icon to share this information with your industry contacts.
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.