Health Condition

Autoimmune Thyroiditis

Autoimmune thyroiditis, often resulting in hypothyroidism, is an immune-mediated destruction of the thyroid gland leading to metabolic and systemic health issues.

Detailed Description

Autoimmune thyroiditis is caused by the immune system attacking the thyroid gland, resulting in decreased production of thyroid hormones. This leads to symptoms such as lethargy, weight gain, and skin disorders. The condition is progressive and requires lifelong management with hormone supplementation.

Common Symptoms

Lethargy
Weight gain
Poor coat quality
Alopecia
Reproductive disturbances
Cold intolerance

Management Options

Oral levothyroxine supplementation
Regular monitoring of thyroid hormone levels

Frequently Asked Questions

Is hypothyroidism common in dogs?

It is one of the most common endocrine disorders in dogs, though prevalence varies by breed.

Can hypothyroidism be cured?

No, but it can be managed effectively with daily medication.

What are the typical symptoms?

Symptoms include lethargy, weight gain, poor coat quality, and reproductive disturbances.

Is hypothyroidism inherited?

There is a genetic component, especially in autoimmune thyroiditis.

How is hypothyroidism diagnosed?

Diagnosis is based on blood tests measuring thyroid hormone levels and autoantibodies.

Condition Details

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Typical Age of Onset

2–6 years

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Testing Available

Yes

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Diagnosing Methods

Blood tests for T4, free T4, TSH, and thyroglobulin autoantibodies

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Preventative Measures

Screening breeding stock; Avoiding breeding affected individuals

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Related Conditions

Non-thyroidal illness syndrome, Other causes of alopecia or lethargy

Affected Breeds

Australian Shepherd

Prevalence: 5% Severity: 3/5

Australian Shepherds have a higher than average risk for autoimmune thyroiditis among herding breeds.

Azawakh

Prevalence: 8.6% Severity: 3/5

Azawakhs have a higher than average prevalence of autoimmune thyroiditis compared to the general canine population, with subtle clinical signs due to their naturally lean build.

Bergamasco Sheepdog

Prevalence: 3.7% Severity: 2/5

Average to slightly lower prevalence than other large breeds; routine screening is advised.

Canaan Dog

Prevalence: 5.7% Severity: 2/5

Autoimmune thyroiditis is the primary cause of hypothyroidism in Canaan Dogs and can be detected before clinical signs appear.

English Setter

Prevalence: 8.5% Severity: 3/5

Autoimmune thyroiditis is the most common cause of hypothyroidism in English Setters, with a higher than average breed risk.

Eurasier

Prevalence: 7% Severity: 3/5

Eurasiers have a higher than average risk. Early detection via autoantibody testing in asymptomatic dogs is possible.

Field Spaniel

Prevalence: 7.2% Severity: 2/5

Field Spaniels have a higher than average risk of autoimmune thyroiditis. Unexplained weight gain, dull coat, and decreased activity are early warning signs.

Giant Schnauzer

Prevalence: 7.6% Severity: 2/5

Autoimmune thyroiditis is a significant cause of hypothyroidism in Giant Schnauzers, and screening breeding stock is recommended.

Ibizan Hound

Prevalence: 3.2% Severity: 2/5

Ibizan Hounds have a lower prevalence of autoimmune thyroiditis compared to the all-breed average, but it is a recognized risk and should be screened for in breeding dogs.

Kromfohrlander

Prevalence: 6.5% Severity: 2/5

Kromfohrlanders have a higher prevalence of autoimmune thyroiditis than the general canine population. Early screening is recommended for breeding dogs.

Pharaoh Hound

Prevalence: 1.7% Severity: 2/5

Autoimmune thyroiditis is rare in Pharaoh Hounds but screening is recommended for breeding stock.

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