|
|
|
Bundle: Arabian (CA + LFS + SCID)
Test number: 8252 (this test number replaces the old 9505H)
Price: £ 126.00 (including VAT) for all 3 tests
|
|
|
|
|
|
1 ) Cerebellar Abiotrophy (CA)
|
|
Breeds
|
|
Arabian
,
Quarab
.
|
|
|
|
The Disease |
 |
|
Cerebellar Abiotrophy (CA) is a genetic neurological disease that affects Arabian horses, it is characterised by lack of balance (Ataxia) and coordination, head tremors, stiff or high stepping gait, hyperreactivity, inability to determine space and distance in addition to other neurological symptoms. The disease develops when the neuron cells in the in the Cerebellum start to die.
|
|
|
|
|
Clinical Signs |
|
Most affected foals appear normal at birth, symptoms start to become noticeable at an average age of four months but may appear as early 6 weeks of age or ever earlier. Symptoms include lack of balance (Ataxia), head tremor (intention tremor), hyperreativity, stiff or high stepping gait, wide based stance, apparent lack of awareness of where the feet are (sometimes standing or trying to walk with a foot knuckled over), poor depth perception, and a general inability to determine space and distance. The disease vary in severity, mildly affected horses may live normal life span, others may experience difficulty stepping up and over objects, run into fences, fall easily and injure themselves, sometimes these horses are euthanized.
|
|
|
|
Trait of Inheritance |
|
Cerebellar Abiotrophy (CA) has a recessive trait of inheritance which means that only horses that carry two copies of the mutation (CA/CA) will be affected by the mutation, carrier horses (N/ CA) will not develop the disease but may pass it on to their offspring, therefore genetic testing is important to control the spread of the disease.
|
Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
|
|
Dam
|
|
Offspring
|
| |
|
|
|
|
|
clear
|
 |
clear
|
 |
100% clear
|
| |
|
|
|
|
|
clear
|
|
carrier
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
clear
|
|
affected
|
|
100% carriers
|
| |
|
|
|
|
|
carrier
|
|
clear
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
carrier
|
|
carrier
|
|
25% clear + 25% affected
+ 50% carriers
|
| |
|
|
|
|
|
carrier
|
|
affected
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
clear
|
|
100% carriers
|
| |
|
|
|
|
|
affected
|
|
carrier
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
affected
|
|
100% affected
|
Clear
Genotype: N / N [ Homozygous normal ]
The horse is noncarrier of the mutant gene.
It is very unlikely that the horse will develop Cerebellar Abiotrophy (CA). The horse will never pass the mutation to its offspring, and therefore it can be bred to any other horse.
Carrier
Genotype: N / CA [ Heterozygous ]
The horse carries one copy of the mutant gene and one
copy of the normal gene.
It is very unlikely that the horse will develop Cerebellar Abiotrophy (CA) but since it carries the mutant gene, it can pass it on to its offspring with the probability of 50%. Carriers should only be bred to clear horses. Avoid breeding carrier to carrier because 25% of their offspring is expected to be affected (see table above)
Affected
Genotype: CA / CA [ Homozygous mutant ]
The horse carries two copies of the mutant gene and
therefore it will pass the mutant gene to its entire offspring.
The horse is likely to develop Cerebellar Abiotrophy (CA) and will pass the mutant gene to its entire offspring
|
|
|
|
Sample Requirements |
Hair Sample from mane with roots (approx 30 hairs) or 1 ml whole blood in EDTA tube.
How to obtain a viable hair sample
Pull around 30 hairs from the mane of the horse with the roots (in faols hair from the tail maybe taken). Wrap the hairs around your finger or a comb, as close as possible to the skin to ensure you obtain the hair roots. Keep dry, put in a bag, label the bag with the horse name, test (s) required. Place in an envelope and send back to us together with the order form. Broken or cut off hair will not be accepted.
|
|
|
| |
|
2 ) Lavender Foal Syndrome (LFS) / Coat Colour Dilution Lethal (CCDL)
|
|
Breeds
|
|
Arabian
,
Quarab
.
|
|
|
|
The Disease |
Lavender Foal Syndrome (LFS) is a lethal genetic disorder with neurological symptoms found in foals of Arabian horses, it is also known as Coat Colour Dilution Lethal (CCDL).
Affected foals are often delivered with difficulty (Dystocia), at birth, foals are unable to stand or sit upright, they extend their limbs, legs and back rigidly, the head and neck are drawn back, convulsions or spasms and rapid eye movements. it is thought that neurological symptoms are due to brain legion and disturbance of the Central nervous System.
The coat colour of most but not all affected foals is described to be very pale chestnut, lavender or light purple, pewter, pale pink or even silvery . The eyes have been described as grayish brown or having blue tint.
Affected foals will die, however, they are usually euthanized within few days of birth on humane grounds.
There is no treatment for the disease.
Lavender Foal Syndrome is only found in Arabian horses, particularly in Egyptian Arabian where prevalence is estimated at about 10%. |
|
|
|
|
Trait of Inheritance |
|
The trait of inheritance is Autosomal Recessive which means that only horses with two copies of the mutated gene (LFS/LFS) will be affected by the disease. Horses carrying one copy of the mutated gene and one copy of the normal gene (N/LFS) will not develop the disease but they can pass the mutation to their offspring. Genetic testing enables you to identify clear horses from carriers.
|
Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
|
|
Dam
|
|
Offspring
|
| |
|
|
|
|
|
clear
|
|
clear
|
|
100% clear
|
| |
|
|
|
|
|
clear
|
|
carrier
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
clear
|
|
affected
|
|
100% carriers
|
| |
|
|
|
|
|
carrier
|
|
clear
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
carrier
|
|
carrier
|
|
25% clear + 25% affected
+ 50% carriers
|
| |
|
|
|
|
|
carrier
|
|
affected
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
clear
|
|
100% carriers
|
| |
|
|
|
|
|
affected
|
|
carrier
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
affected
|
|
100% affected
|
Clear
Genotype: N / N [ Homozygous normal ]
The horse is noncarrier of the mutant gene.
It is very unlikely that the horse will develop Lavender Foal Syndrome (LFS) / Coat Colour Dilution Lethal (CCDL). The horse will never pass the mutation to its offspring, and therefore it can be bred to any other horse.
Carrier
Genotype: N / LFS [ Heterozygous ]
The horse carries one copy of the mutant gene and one
copy of the normal gene.
It is very unlikely that the horse will develop Lavender Foal Syndrome (LFS) / Coat Colour Dilution Lethal (CCDL) but since it carries the mutant gene, it can pass it on to its offspring with the probability of 50%. Carriers should only be bred to clear horses. Avoid breeding carrier to carrier because 25% of their offspring is expected to be affected (see table above)
Affected
Genotype: LFS / LFS [ Homozygous mutant ]
The horse carries two copies of the mutant gene and
therefore it will pass the mutant gene to its entire offspring.
The horse is likely to develop Lavender Foal Syndrome (LFS) / Coat Colour Dilution Lethal (CCDL) and will pass the mutant gene to its entire offspring
|
|
|
|
Sample Requirements |
Hair Sample from mane with roots (approx 30 hairs) or 1 ml whole blood in EDTA tube.
How to obtain a viable hair sample
Pull around 30 hairs from the mane of the horse with the roots (in faols hair from the tail maybe taken). Wrap the hairs around your finger or a comb, as close as possible to the skin to ensure you obtain the hair roots. Keep dry, put in a bag, label the bag with the horse name, test (s) required. Place in an envelope and send back to us together with the order form. Broken or cut off hair will not be accepted.
|
|
|
| |
|
3 ) SCID (Severe Combined Immunodeficiency)
|
| |
|
The Disease |
|
Severe Combined Immunodeficiency of Arabian foals is a fatal disease caused by the lack of B- and T-lymphocytes. It is estimated that 2-3% of Arabian foals have SCID. This would suggest that 25% of Arabian horses carry the defect gene.
|
|
|
|
|
Description |
|
This is a mutation-based gene test, which offers many advantages over other methods
The genetic defect leading to the disease has been identified. By DNA testing the responsible mutation can be shown directly. This method provides a very high accuracy test and can be done at any age. It offers the possibility to distinguish not only between affected and clear horses, but also to identify clinically healthy carriers. This is an essential information for controlling the disease in the breed as carriers are able to spread the disease in the population, but can not be identified by means of common laboratory diagnostic.
|
|
|
|
|
Trait of Inheritance |
|
Severe Combined Immunodeficiency is an inherited autosomal recessive trait. This means that a horse can be genetically clear (homozygous normal), affected, or a carrier (heterozygous). The carriers can spread the diseased gene in the population. Therefore, reliable information on non-affected horses is the key to controlling this disease.
|
Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
|
|
Dam
|
|
Offspring
|
| |
|
|
|
|
|
clear
|
|
clear
|
|
100% clear
|
| |
|
|
|
|
|
clear
|
|
carrier
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
clear
|
|
affected
|
|
100% carriers
|
| |
|
|
|
|
|
carrier
|
|
clear
|
|
50% clear + 50%
carriers
|
| |
|
|
|
|
|
carrier
|
|
carrier
|
|
25% clear + 25% affected
+ 50% carriers
|
| |
|
|
|
|
|
carrier
|
|
affected
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
clear
|
|
100% carriers
|
| |
|
|
|
|
|
affected
|
|
carrier
|
|
50% carriers + 50%
affected
|
| |
|
|
|
|
|
affected
|
|
affected
|
|
100% affected
|
Clear
Genotype: N / N [ Homozygous normal ]
The horse is noncarrier of the mutant gene.
It is very unlikely that the horse will develop SCID (Severe Combined Immunodeficiency). The horse will never pass the mutation to its offspring, and therefore it can be bred to any other horse.
Carrier
Genotype: N / SCID [ Heterozygous ]
The horse carries one copy of the mutant gene and one
copy of the normal gene.
It is very unlikely that the horse will develop SCID (Severe Combined Immunodeficiency) but since it carries the mutant gene, it can pass it on to its offspring with the probability of 50%. Carriers should only be bred to clear horses. Avoid breeding carrier to carrier because 25% of their offspring is expected to be affected (see table above)
Affected
Genotype: SCID / SCID [ Homozygous mutant ]
The horse carries two copies of the mutant gene and
therefore it will pass the mutant gene to its entire offspring.
Affected horses usually die before reaching the breeding age.
The horse will develop SCID (Severe Combined Immunodeficiency) and will pass the mutant gene to its entire offspring
|
|
|
|
Sample Requirements |
Hair Sample from mane with roots (approx 30 hairs) or 1 ml whole blood in EDTA tube.
How to obtain a viable hair sample
Pull around 30 hairs from the mane of the horse with the roots (in faols hair from the tail maybe taken). Wrap the hairs around your finger or a comb, as close as possible to the skin to ensure you obtain the hair roots. Keep dry, put in a bag, label the bag with the horse name, test (s) required. Place in an envelope and send back to us together with the order form. Broken or cut off hair will not be accepted.
|
|
|
| |
|
Price
for the above 3 tests
|
|
£ 126.00 (including VAT)
|
|
|
 |
|
|
|
|
| See also: |
|
|
|
