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Paramyxovirus
This
virus disease was first found to take an epidemic course in pigeons in the
Federal Republic of Germany in 1982. Following a large international fancy
pigeon show the disease occurred in pedigreed pigeons in the winter of 1982/1983
After the start of the racing season in the summer of 1983, numerous cases
occurred also in racing pigeons with substantial losses. The Paramyxovirus of
pigeons is closely related to the virus of atypical fowl pest (Newcastle
Disease). The virus spreads by direct contact from bird to bird or indirectly
through the pathogen bearing dust. This dust is also spread by insects (flies, mosquitoes),
mammals, (rats, mice) and humans.
The first sign of the
disease is increased water intake and watery droppings, soon some of the birds
show central nervous disorders like paralysis, torsion of the neck, increased
timidity and typical twisting movements of the body. To detect the infection at
an early stage these nervous disorders can be provoked if there is reason to
suspect the disease. A pigeon suspected of Paramyxovirus is put into an
unaccustomed position, for example it is placed on its side, or is frightened by
the clapping of one's hands. Pigeons suffering from Paramyxovirus are no longer
able to control the takeoff reflex in such situations of fright. They either fly
against a wall or overturn in flight. The infected pigeons show typical behavior
when trying to eat their grain. They try to pick the grain, but just before
reaching the grain they jerk their head sideways' thus missing the grain. This
condition will worsen until the bird will not be able to pick up any seeds at
all. Of the visibly affected pigeons, some will die quickly, but the majority
live on and develop poorly.
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General Measures If The
Disease Is Suspected: If Paramyxovirus
is suspected, precautionary measures should be taken which slow down or
prevent the spread of the infection, until the position has been clarified.
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The most important action
that should be taken immediately is to establish the cause of the disease.
For this purpose laboratory tests described have to be carried out.
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All diseases found in
addition to paramyxovirus during the investigation and especially the
laboratory test, must be treated at once. The progress of the virus
infection is mitigated by the elimination of concomitant diseases.
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Pigeons with visible signs
of the disease (diarrhea, central nervous disorders) should be separated
from the rest of the loft and treated.
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Affected birds should be
offered water in vessels with a large surface, since pigeons with nervous
disorders are often unable to take up water from normal drinking vessels.
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Pigeons showing pronounced
central nervous disorders should be fed individually. In the loft they would
not be able to feed at all, since the healthy pigeons would quickly eat up
all the feed.
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FREE FLIGHT SHOULD BE
STOPPED ALTOGETHER
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Outsiders should not be
allowed to enter the loft.
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To stabilize the
intestinal environment, give the pigeons beneficial bacteria.
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Measures To Be Taken If
Paramyxovirus Is Present: The virus
infection cannot be treated by giving drugs that contain antibiotics. With
this type of pathogen, only vaccination can prevent the spread of the
infection. According to present findings, the immunity conferred by the
vaccine lasts only 6 months.
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All pigeons with severe
central nervous disorders should be culled, since the prospects of a cure
are very poor.
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I the fancier does not
wish to eliminate valuable pigeons, they should be separated from the rest
of the loft. Vaccination of diseased birds is not possible.
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Emergency vaccination
which can prevent the spread of the virus infection, should be carried out
in all pigeons that still appear to be healthy. After the emergency
vaccination it will still take 2 or 3 weeks until sufficient antibodies have
been formed. During this time further cases of the disease may appear.
At the time of vaccination, such pigeons were in the incubation phase, i.e.
they were already infected by the virus, but did not show any sign of the
disease.
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All pigeons in lofts in
the vicinity of the affected loft and having contact with it, should be
vaccinated, even if no cases of the disease have been observed.
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Hygienic measures and disinfection
should be carried out to support vaccination: droppings,
remnants of feed and litter should be removed daily when cleaning the loft.
Cleaned surfaces should be disinfected.
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Supportive Measures: Administration
of vitamins, particularly of the B complex, and of body salts in the form of
electrolytes in the drinking water.
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Beneficial bacteria for
the intestinal flora.
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Secondary infections
should be treated.
The medication
of choice is:
Colombovac pmv/pox. For the prevention of paramyxovirus and pox in
pigeons, all in one injection. Should be injected under the skin on the upper
rear part of the neck, below the head area. Dosage is 0.2cc per pigeon. Do not
vaccinate pigeons under 6 weeks of age. Keep vaccine refrigerated until use, use
all of the vaccine after opening, dispose of the unused portions and syringes properly.

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