Bearded Collie Auto Immune Disease Genetics Co Efficients of Inbreeding Way Forward
Beardies Past, Present and Future
Co efficients of Inbreeding for Dummies
An explanation of what COIs are and what they mean
Gap Analysis Report
Basic Beardie Genetics
Effective Population Size
Bearded collie. dangers of low population size
Bottleneck Sires
Auto Immune Disease
Addison's Disease
Addison's Disease Update
Auto Immune Haemolytic Anaemia
Symetrical Lupoid Onchodystrophy (SLO)
Immune Mediated Hypothyroidism
Idiopathic Thrombocytopenia Purpura
Useful links to other websites
The Cohort Study
This page describes the study that will collect comprehensive and valuable data on the health and welfare of the Bearded Collie.
Dilated Cardiomyopathy
questions the possibility of some instances of DCM being auto immune problem

Idiopathic Thrombocytopenia Purpura

Previously known as Idiopathic  thrombocytopaenic Purpura . Idiopathic simply means of unknown cause. Now the disease is known to be immune mediated it has kept the same acronym ITP but changed its name to Immune Mediated Thrombocytopaenic Purpura.

This is bleeding disorder caused by a low platelet count. ITP occurs when the immune system cells produce antibodies against the platelets. Once the antibody, which is a foreign protein, is attached to a platelet the spleen destroys the platelets. Platelets are produced from the fragmentation of bone marrow megakaryocytes and are then released into the circulation where their average life span is eight to 12 days. Aged platelets are removed from the circulation by tissue macrophages especially in the spleen, ITP is mainly a disorder of accelerated platelet destruction when antibodies bind to platelet membranes, enhancing platelet clearance by the mononuclear phagocyte system. This process is mostly in the spleen but the liver also plays its part. If many platelets are destroyed, the affected animal will have significant bleeding and bruising. It seems, like most auto immune conditions, to affect bitches more than dogs, especially in middle age and when speyed.

There are several acquired causes of thrombocytopaenia which also need to be considered before assuming it is auto immune. This group includes the toxic effect of some drugs, other toxins, viral, rickettsial and protozoan infections. Chronic hepatitis, Myeloid leukemia and some tumours such as haemangiosarcoma may all cause significant reduction in the platelet count.  It can be quite difficult to confirm the specific cause

In milder cases an affected dog may present with some lethargy, weakness and nosebleeds. The skin and mucous membranes of the mouth may show pinpoint purplish coloured spots known as Petechiae. If more seriously affected there may be spontaneous bleeding so blood is seen in the urine and stools. On examination the Vet may be able to detect enlargement of the spleen.

Treatment involves corticosteroids either alone or in combination with immunosuppressive drugs. Most dogs do recover with either single or multiple courses of treatment as there can be a tendency to relapse.

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