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This information is provided by
Provet for educational purposes only.
You should seek the advice of your
veterinarian if your pet is ill as only he or she can correctly advise on the
diagnosis and recommend the treatment that is most appropriate for your pet.
Anaemia is a
reduction in the number of red blood cells in the blood and in oxygen carrying
capacity of the blood Anaemia can be diagnosed based on clinical
signs, for example :
- the animal will have pale mucous membranes, eg gums, lips
- fatigue
- increased respiratory rate
- increased heart rates
It is confirmed on laboratory examination of blood samples.
There are many possible causes of anaemia - which may require other tests
to be performed to make the diagnosis, including the following :
- Haemorrhagic anaemia - blood loss from the body - the most
common cause of anaemia in pets
- External haemorrhage - wounds, nose bleeds
- Internal haemorrhage - into urine, faeces or body cavities eg the
abdomen
- Common causes of haemorrhage include :
- Trauma
- Tumours of various organs
- Blood clotting defects
- Poisoning with anticoagulants eg warfarin - prevent blood
clotting and cause haemorrhages
- Severe liver disease - the liver manufactures important clotting
factors
- Large numbers of blood-sucking parasites eg ticks, hookworms
- Gastrointestinal ulcers - can occur after drugs eg non-steroidal
anti-inflammatory drugs (NSAIDs)
- Haemolytic anaemia - increased destruction of red blood cells - the least
common cause of anaemia in pets
- Autoimmune disease - caused by antibodies being produced against the
animals own red blood cells
- Toxins - eg snake venom, onions, paracetamol, phenylbutazone, fertilizers
(nitrates), lead, copper
- Blood parasites - eg Mycoplasma haemofelis (previously called feline haemobartonella
infection), leptospirosis,
canine heartworm (dirofilaria immitis)
- Reaction to an incompatible blood transfusion
- Hypotonic fluids given intravenously
- Physical injury to red cells - burns, radiation poisoning
- Low blood phosphorus (hypophosphataemia)
- Some malignant cancers eg haemangiosarcomas
- Inadequate production of red blood cells
- Nutritional deficiencies (rare) - iron, protein, Vitamin B (folate,
niacin, pyridoxine, riboflavin)
- Bone marrow disease
- Secondary to other diseases eg inflammation, cancer, renal
failure, liver disease, infections
- Toxicity - drugs, heavy metals
Some forms of anaemia are treatable but others are not. Treatment includes
:
- Stop blood loss
- Treat the underlying (primary) disease
- Blood transfusions
- Ensure adequate nutritional intake
- Avoid contact with toxins
- Drugs that influence the immune response
Last updated : March 2013
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