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Cause |
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Effect |
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Prevention |
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| Scratches |
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Mechanical
damage to hides or "scratch" is caused
by barbed wire, goads, sharp projections and the
horns of other animals. Irritation caused by
ectoparasites increases scratch damage due to
rubbing and wounds can then become infected. |
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Scratch
is one of the most common forms of damage and can
be recent (open) or from old injuries (closed) |
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Avoid
the use of barbed wire, particularly where cattle
congregate to feed and at loading/unloading
points. Use electric fencing or a guard wire in
front of barbed wire. Remove loose nails and
projections from pens. Dehorn all calves and
incoming stock. Treat animals against
ectoparasite infections. |
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| Dung |
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Dung
accumulates on cattle when they are held in
enclosed or confined conditions. Prolonged
contact with dung leads to severe irritation of
the skin and can lead to infections. Factors
affecting dung build up include weather, housing
and holding conditions and farming system. |
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The
irritation to the skin due to prolonged contact
with dung leads to surface staining, grain
damage, cutting during mechanical operations and
increased levels of bacteria. |
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Preventions
include the use of straw in cattle pens, avoiding
moist diets and regular cleaning of pens. Dirty
animals may be rejected at the abattoir on
hygiene grounds. |
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| Ringworm |
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Ringworm
is a parasitic disease caused by the fungus
Trichophyton. The fungus grows on both the hair
and skin and affects their growth. Ringworm is
highly infectious and is common during housing
over winter. Ringworm is also transmissible to
man on contact. |
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Ringworm
infection causes characteristic circular lesions
on leather that appear either shiny or dull.
Affects 10% of cattle and results in the loss of
£10M pa due to downgrading. |
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Ringworm
infection can be treated but the lesions remain
on the leather. There is now a vaccine available
to prevent initial infection and thus prevent
downgrading due to lesions. |
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| Tick |
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Ticks
are known to carry bacterial, viral and parasitic
infections. They feed off any warm blooded animal
and so can transmit disease to man. In the UK,
the highest incidence is in the hill regions,
with seasonal peaks occurring in May and
September. |
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Ticks
feed by attaching themselves to the animal and
abstracting blood. The mouth part punctures the
skins, causing visible damage to the hide and
results in holes in the leather. Additional
damage may be caused by rubbing due to
irritation. |
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Animals
can be treated with synthetic pyrethroids and
organophosphates. |
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| Lice |
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There
are two types of lice found on cattle - biting
and sucking. Infestations cause intense
irritation which leads to rubbing. Lice favour
cool conditions and are commonly found in the
autumn/winter months. Transmission is through
contact with infected animals. |
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Lice
cause localised areas of inflammation and
possible scar tissue. These areas react
differently to the dyeing process and leave areas
of light spots or "FLECKS" |
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There
are several control treatments based on
organophosphates, synthetic pyrethroids or
avermectin compounds. |
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| Demodex |
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Demodex
mites penetrate hides through the hair follicles
and then migrate to deeper parts. Here they
encyst and multiply, causing raised nodules on
the hide surface. Raised tufts of hair can be an
indication of infestation. |
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Results
in light areas on the dyed hide which detracts
from the appearance and results in downgrading.
Also, the hair follicles are enlarged and remain
visible after tanning. |
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It
is estimated that 10% of UK cattle are infected
with Demodex and the incidence is increasing.
Pour-on treatments which contain organophosphates
and avermectins are effective against Demodex. |
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