What is
Anaemia.
Anaemia
means the horse has a low level of haemoglobin in the blood. This is the
pigment which carries the oxygen to the tissues around the body. This may
be because there is a decrease in the number Red Blood Cells (RBC’s) in the
blood (see my Circulatory
System blog) or a low level of haemoglobin, or both. As a
result of this it is likely that there will not be enough oxygen getting to key
areas of the horse.
Signs
These can
vary slightly depending on the cause of the anaemia.
- Pale gums,
mucous membranes and the inside of the eyelids
- Weakness
- Dull coat
- Weight loss
- Poor
appetite
- Poor
performance
- Reduced
stamina
- Restlessness
- Increased
heart rate
- Fever
- Urine may be
a darker colour if red blood cells are being destroyed.
Causes
Anaemia has
a number of different causes and these causes can affect the signs too.
- It may be
due to an infection or illness eg: Equine Infectious Anaemia.
- Anaemia can
be caused by bleeding from a wound but it may also be internal bleeding
following a serious fall or accident. This will of course mean there is a
severe loss of blood.
- It can be
caused by an excessive worm burden (see my blog
about worms).
- Nutritional
deficiency is another cause of anaemia but your vet will be best placed to
advise on this following the blood test.
- Stress can
also cause anaemia. Sometimes seen in horses that are in hard training
and performing regularly at a high level. This is because the continual hard
work can lead to stress which can affect the production of RBC’s.
One type of worms.
Diagnosis
Diagnosing
anaemia is done with a blood test by a vet.
Equine Infections Anaemia is a notifiable disease!
This is a copy of Chesney's blood test from
last winter - see his low RBC count!
Treatment
Appropriate
treatment will be dependent on the cause of the anaemia.
- If the cause
is external bleeding then the wound should be treated immediately (see my blog).
- If the cause
is an infection or illness then again a vet will need to treat this.
- If worms are
causing the anaemia then the vet will advise a worming schedule to tackle the
issue – this may include egg counts.
- Anaemia
resulting from a nutritional deficiency will mean giving the horse a dietary
supplement initially, followed by a further blood test to check for
improvements. The diet will need to be assessed to identify the reasons
for the deficiency so the anaemia can be prevented in the future.
- Stress
caused anaemia will again need a vet’s input. However, horses in hard work are
likely to need a well balanced supplement to support them .
Prevention
Anaemia from
blood loss is obviously difficult to prevent, no easier than preventing your
horse from injuring himself! However, ensuring
your horse has a well balanced diet appropriate to his work load and with a well
balanced supplement if necessary will help reduce the likelihood of anaemia. A
consistent egg count and worming programme should prevent an excessive worm
burden causing anaemia. Equine
Infectious Anaemia is spread by large horse flies so having good Yard
Hygiene and adhering to your yard's biosecurity measures eg: isolation
boxes etcetera are important.
Anaemia is
unusual in horses and you should never diagnose yourself without a blood
test. Your vet will be able to help you identify the cause and therefore
the treatment and future prevention!
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Until next time!
Jo