The Rural Voice, 1993-05, Page 16f-7,..11g0=to
q...;40...44=1;ai
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We now have our HYDRAl1UC TEST
STAND in operation.
This allows us to detect any leaks or
lack of pressure in hydraulic systems,
valves, pumps and motors. We can
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When you have problems call
BARFOOTS WELDING AND
MACHINE SHOP at
519-534-1200 or 1-800-265-6224
We also provide:
Hydraulic pumps, Valves, Cylinders
& Controls - • Repair • Sales • Service
Parts & Service - • Bearings • Shafting
• Shearing & Bending • Castings
repaired • Cylinders re -bored &
resleeved
BARFOOT'S WELDING
(Bwmp
Wrt,
519-534iaon.1200Ont.
1-800-265-6224
UNCHAIN YOURSELF
Hydra -Spread frees you from all the
mechanism (and breakdowns) of chain
type spreaders. Manure will not freeze
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Available in 280 bu. and 350 bu.
sizes at great prices
N. E.
Hagedorn
& Sons Limited
Paisley 519-353-5642
Established 1928
"Farm Equipment Is
Our Only Business"
12 THE RURAL VOICE
Diagnostics
Rhinitis in pigs — part two
by Dr. Ab Rehmtulla
Veterinary Laboratory Services
Huron Park
In part one, we defined and
discussed causes of various forms
of rhinitis. Now we will discuss, as
a specific disease entity,
Progressive Atrophic Rhinitis
(PAR) caused by
toxigenic Pasteurella
multocida (tpm) bacteria
usually of type D.
In herds with a history
of PAR, tpm colonizes
throats and tonsils of up
to 10-15 per cent of sows.
This then is a source of
nasal infection of
newbom piglets in their
first week of life. In
mixed populations of young
weaned piglets, bacteria readily
spread amongst pigs well into the
growing period, often in absence of
any clinical signs. These pigs are
now "carriers" and a source of tpm
to other herds, if purchased and
brought in. When even minor
damage to the membranes lining
the nasal cavities occurs, tpm starts
to produce a toxin, which in turn
causes damage to the bones of the
scrolls. What follows is bone
resorption and replacement by
spongy soft tissue. Clinically these
changes manifest as sneezing,
snuffling and snorting through the
grower period. Later, nasal
discharge (sometime bloody),
shortened twisted noses and growth
retardation follow as classical
symptoms of full-blown PAR.
PAR is a disease of intensive pig
production, where successive
batches are housed in densely
stocked, continuously occupied,
poorly ventilated buildings. Hence,
manipulation of housing,
environment and management
offers the best means of reducing
and eliminating this disease. Such
measures are easier to implement in
small, closed, "all in - all out" herds
in uncrowded housing, with good
ventilation and temperature control,
and a high standard of hygiene and
disinfection. Further, minimal
movement, least mixing of pigs,
and wet feeding systems resulting
in cleaner atmosphere also aid
towards this goal.
The key to prevention of PAR is
rearing pigs free of tpm by adopting
an SPF (specific pathogen
free) system accompanied
by stringent infection
barrier or biosecurity.
After establishing current
disease-free status, ensure
that only pigs from a
source known to be free
of PAR are brought in;
and continue monitoring
breeding stock for
absence of tpm.
Monitoring also implies continually
tracking live weight gains and feed
efficiency, and keeping vigilant
watch for any sneezing and snout
irregularities in weaned pigs
accompanied by regular slaughter
checks for turbinate atrophy (scroll -
depletion).
In the long run, these measures
are far more rewarding; in keeping
the disease out or detecting very
early any breech of biosecurity; and
clamping it, rather than being
complacent and letting the disease
become clinically well -entrenched
in the herd, and then trying to treat
it, when it is too late.
Treating now becomes a major
undertaking requiring working
closely with your swine herd health
veterinarian. This multi -pronged
approach will require a combination
of sow vaccination, antibiotic
medication of sows in feed and by
injections in piglets, piglet
vaccinations and feed medications
of weaners and growers, plus
improving housing management
and husbandry. All these measures
are very cumbersome, labour
intensive and costly, giving further
credence to the old adage that
prevention is better than cure.
Alternatively, your Veterinarian
may recommend a depopulation
Manag
emelt
key t
0
prevent
ion