Swine Health Management Journal Club - July 2024

Read the Journal Article:

You can access the article and the quiz from the Swine Health Management Journal Club home page. We suggest bookmarking this page so you always have it handy and can easily access it at anytime of your choosing!

How to meet your Maintenance of Certification (MOC) quota:

Six articles will be presented each year with an accompanying quiz consisting of 5-10 questions. You must correctly answer 80% of questions to receive credit, and Diplomates may take each quiz up to three (3) times.
You will receive an email from info@abvp.com notifying you when each article becomes available. Please be sure info@abvp.com is marked as a 'safe sender' in your email client. How do you mark an email address as a 'safe sender' you ask? Check out this article.
Article quizzes will expire 12 months after original posting and will no longer be available for credit after that date.
Once quizzes are answered, you will receive your results immediately on the screen. 80% or better is passing. YOU NEED TO TAKE A SCREENSHOT OF YOUR SCORE. The system does NOT automatically mark you as passed. You need to MANUALLY upload your passing grade. How do you take a screenshot? Learn how here. You could also save the page as a PDF and upload that. How do you do that? Learn how here.

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* 1. What is your first name?

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* 2. What is your last name?

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* 3. What is your email address?

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* 4. The RFLP pattern of PRRS virus is used to classify PRRS variants. RFLP stands for:

repeated fragment line polymerase

restriction fragment length polymorphism

repeated filament length pattern

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* 5. Transmission of PRRS to naïve herds is thought to happen indirectly through fomites. In order for this to happen, the virus needs to survive in the environment. Survivability depends on factors such as:

matrix, temperature, moisture, and pH

temperature, barometric pressure, moisture, and texture of surfaces

moisture, ammonia levels, age of pig, and pig density of the area

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* 6. In this study, which strains of PRRS virus appeared to be the most stable in the environment regarding time and temperature:

ATP vaccine and Lelystad

1-4-4 SD and 1-4-2

1-8-4 and 1-4-4

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* 7. Changes in the frequency of RFLP throughout time have been observed within the same strain of PRRS virus. This is worrisome from a biosecurity standpoint because:

It indicates the possibility of obtaining different survival patterns.

It indicates that the virus is resistant to all known disinfectants.

It indicates that a vaccine strain has become virulent.

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* 8. Limitations of this study include:

Small sample size and not using a complementary assay with higher sensitivity such as indirect immunofluorescence assay (IFA)

Not comparing enough different PRRS virus strains and not using a PCR test as is used in the field

Small sample size and too narrow of a temperature range for comparison