PRRSv
Porcine Reproductive and Respiratory Syndrome Virus
Stopping
introduction of the virus
This two page
photomontage intends to remind producers of the key routes of introduction
Virus
direct |
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One problem is that no
matter how good a negative source is at testing, it still can take 2 days
before the breakdown can be detected and may take up to 3 weeks |
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Only purchase gilts from a negative unit. All gilts to go through a 60 day isolation period. Gilts can be homebred |
Only purchase boars from a negative unit. All boars to go through a 60 day isolation
period |
Semen AI Ideally
semen should be produced on farm. If semen is purchased ensure good vet to vet
communication |
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Pork and other pig products PRRSv can remain viable in pork products and their
juices |
wild pigs Pigs are able to survive in many environments and
wild pigs can move between units. Note
the security fence must go 0.5 m into the ground |
Live vaccines No live PRRSv vaccines should be used on the farm or
on stock intended for the farm |
Virus
through the air |
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Location nearby farm None of the farm facilities must be within 1.5 km of
another pig farm The photograph illustrates a fictional area with
breeding, nursery and finishing farms potential local spread areas (1 mile) |
Isolation facilities should be placed no nearer than
150 metres. Note the isolation area must
not be 1.5 km from an unknown pig source.
The isolation area must be run all-in/all-out |
Local road Major roads, especially roads leading to
slaughterhouses may be result in PRRSv positive pigs being transported close
to the farm. Ideally the farm should
not be within 150 metres of a major road |
Virus
through vectors |
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The truck taking animals to slaughter needs to kept
away from the animal units |
All trucks moving animals to the slaughterhouse must
be cleaned and dried before collecting the pigs. Note trucking bring gilts and boars to the
isolation area |
To avoid the rendering truck having to collect dead
animals, practice composting or incineration for all dead animals |
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All feed deliveries must be made to the perimeter of
the farm, through the security fence |
Vehicles should be either on- farm or off-farm. Provide a car park |
Boot security Foot-wear should be either on-farm or off-farm. Provide a clear on-farm boot area |
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All visitors and
staff should remove outer clothing before entering the on-farm side. Note the different toweling |
Biting flies can transmit PRRSv. Protect building with fly screens 2 mm mesh. Do not have plants growing within 2 metres
of the unit. Note placement of
composting piles and lagoons |
Virus filters MERV filters are possible (0.3µm filter), but
probably only practical for AI studs.
The air requirements of pigs, staff and dust from feed and environment
may restrict the use of virus filers |
Apply
common sense do not purchase second hand equipment no matter how cheap |
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Ensure
all items entering the farm are monitored.
Note electrical and other maintenance contractors who work on other
pig units |