Animal Health at the farm level: PMWS and PRRS

Which of the following are common predisposing factors for both PMWS and PRRS?

	a)	Stocking density, herd size, cross fostering, poor biosecurity
	b)	Presence of other pathogens, buying replacement gilts, poor biosecurity
	c)	Inadequate maternal immunity, herd size, poor biosecurity
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The sole presence of PCV2 can be enough to trigger PMWS clinical signs

	a)	True
	b)	False
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Why is effective vaccination against PRRS virus so difficult?

	a)	Because PRRS virus has a high mutation rate
	b)	Because there are two types of vaccines against PRRS
	c)	Because live vaccines against PRRS virus represent a high risk
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Which of the following strategies should be adequate for managing both PMWS and PRRS?

	a)	Improve biosecurity, de-pop/re-pop and herd closure
	b)	Improve biosecurity, air filtering and test and remove pigs
	c)	Improve biosecurity and improve farm management
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