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Like any living being, cattle are subject to a great variety of diseases,
with each requiring vaccinaations or other forms of treatment. Sometimes
treatments can be made by you or your parents, but never delay in calling
a veterinarian when there's a chance that the disease could reach a
critical stage.
In managing your beef cattle health programs, prevention is the easiest
and cheapest method of diseases and parasite control.
Cleanliness--sheds, feeds and water troughs, and lots--leave disease
little chance to create problems.
During your daily care routines, watch your animal for signs of scours,
constipation and abnormal behavior symptoms. Most project animals being
developed for show will seldom be subjected to disease other than those
encountered in everyday farm and ranch operations. Make youself familiar
with diseases that affect cattle in your area.
Some of the most common diseases that affect all beef animals are black
leg, shipping fever, and malignant edema. Each are infections that can
be controlled by vaccination with the common "three-in-one" vaccine.
Vibriosis, which affects reproductive abilities of females, and
enterotoxemia or over-eating disease also may be controlled with
vaccines.
Remember, most vaccines do not produce lifelong immunity, and periodic
boosters may be required to maintain immunity. Also, vaccines do not
eliminate disease. Vaccines simply enhance the ability of the animal to
withstand the challenge of exposure to a specific infectious disease, but
do nothing to eliminate the organisms from the premises or environment.
It is important to follow instructions carefully in the animal health
area of beef cattle production. Be alert to pharmaceutical cautioning.
Follow instructions explicitly.
Black Leg: An acute general infection in cattle characterized by high
fever and swelling of the muscles, especially in the legs, and sudden
death. It usually occurs in the spring and the fall of the year.
Treatment is very difficult because death can be so rapid. For this
reason, it is a a common practice to vaccinate for it as a preventive
measure, at 3 to 4 months of age, and repeated 30 days after weaning.
Malignant Edema: Another fatal infection marked by gangrenous swelling
and other toxic symptoms similar in character to Black Leg. This disease
usually is caused by an open wound. Vaccination is the preventative
measusre and is normally performed when the animal is 3 to 4 months of
age, and repeated 30 days after weaning.
Shipping Fever or Hemorrhagic Septicemia: Usually occurs when cattle are
under extreme stress conditions, such as weaning or in the
trsansportation of catttle from the ranch to the feedlot or during stock
shows when cattle have been on the road for a long time. Vaccination
before the stress period is a good preventative measure, but does not
ensure that the animal will not contract shipping fever.
Vibriosis: Cows and heifers of any age may become infected by mating
with infected or carrier bulls. Usual symtoms in a breeding herd are an
extended breeding period and low fertility rate as low as 20% for the
initital breeding period in a chronically infected herd. Vaccination
prior to the breeding season is the best control. Vaccination of bulls
is recommended to help eliminate the carrier state.
Bang's Disease or Brucellosis: Characterized by infectious abortion and
is prevalent in all cattle in all countries. Vaccination has been
successful and sets up a level of immunity that protects the majority of
animals. Heifers should be vaccinated for brucellosis between the ages
of 3 to 12 months and has to be done by a qualified veterinarian.
Testing control programs vary from state to state, and in moving animals
from one state to another requires a negative test for Bang's of
non-vaccinates.
Leptospirosis: In recent years, Lepto has become one of the most
widespead diseases of livestock with its many strains. The disease
causes fever, weakness, anemia, and kidney troubles. Pregnant females
abort their calves about 10-28 days following infection. Vaccination is
important since the disease can be transmitted by dogs and deer. It is
recommended that all animal entering a show be vaccinated two weeks prior
to the show seasons.
Anaplasmosis: An infectious disease prevalent in warm climates and
spread by biting insects. Regular spraying of animals and barns to
reduce flies, ticks, mosquitoes and such insects that spread the disease
will aid in its control. Immunization can be accomplished by two doses
of vaccine, administered by a veterinarian about six weeks apart.
Infectious Bovine Rhinotracheitis, "Red Nose": A disease of the upper
respiratory passages caused by a specific virus, that also may cause
abortion or stillbirth. Symptoms can easily be confused with shipping
fever, calf diphtheria and other respiratory diseases. The only
preventative measure is by vaccination, which also is helpful in
preventing eye infections and vaginitis.
Bovine Virus Diarrhea: A virus that affects the respiratory and
alimentary tracts. The disease is widespread and has been reported in
all sections of the U.S. Most severe forms produce severe weight losses
which the animals suffer during the course of disease and the slowness to
respond and gain weight. Prevention is by vaccination.
Calf Diphtheria: A bacterial disease of calves that involves the area in
the back of the mouth and the larynx or voicebox area. Animals will go
off feed, have an elevated temperature and severe breathing problems.
Treatment is by administration of sulfonamide drugs, and it usually is
successful if caught early enough. Vaccination is a preventative
measure.
INSECTS AND PARASITES
Texas Longhorns and Longhorn crosses show high resistance to insects, but
still should be given protection. The most troublesome insects and
parasites are flies, lice, ticks (in some areas) and grubs or warbles.
Internal Parasites: Including intestinal parasites, lung worms, and
liver flukes also may cause problems. Proper management will keep them
from causing severe problems; however, spray your calves and their
quarters for flies at least once weekly during warm weather. Lice can be
controlled in late winter and early spring by spraying.
Grubs: The larvae stage of heel flies may be controlled by any of the
several special insecticides and chemicals available for grub control.
These include spraying or dusting the animal's back and sides with grub
control powder. Many systemic products are available for the control of
grubs and other parasites. Check for correct application times.
Internal parasites, including worms, etc., may be controlled through oral
doses of special medications, or by inclusion of these medications in
mineral blocks.
In all cases of treatments, follow instructions and discuss the need with
your veterinarian. Again, be alert to some manufacturer's cautions that
a particular pharmaceutical product may be injurious or harmful when used
in Texas Longhorns. Follow instructions explicitly.
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