Canine hypothyroidism: avoiding over diagnosing the condition

In Pract. Mar 2022;44(2):68-75. 22 Refs

Susanna Spence¹

¹ North Downs Specialist Referrals, Bletchingley RH1 4QP, UK.

Author Abstract

Background: Hypothyroidism is one of the most commonly treated endocrine disorders in dogs; however, the diagnosis of this condition can be challenging, potentially leading to misdiagnosis. The clinical signs of hypothyroidism are vague and non-specific, as are the routine haematological and biochemical changes. When assessing the thyroid axis, the classical finding of decreased total thyroxine and increased thyroid-stimulating hormone is highly specific for the diagnosis of hypothyroidism, but has less good sensitivity. Although numerous other tests are available, a basic understanding of thyroid gland physiology and thyroid test methodology is needed to be able to use each test and interpret the results correctly.

Aim of the article: This article discusses how to confidently diagnose the condition, explaining how clinicians need to consider the clinical signs, routine clinicopathological changes and thyroid hormone concentrations together, rather than in isolation.

Article Tools:

Email to me

Archives Highlights:

'Transmission Tracker - Dirofilaria'- a public dashboard to assess in real-time the temperature-bounded transmissibility of canine heartworm across Australia.
'Transmission Tracker - Dirofilaria' processes near real-time temperature records across Australia and allows users to enquire about historical and current weather suitability for canine heartworm transmission at any Australian postcode of their interest. This information allows veterinarians to access when, and for how long, heartworm may be transmitted at a specific location, assess the associated risk of infection, and advise on a patient-dependent dirofilariosis prevention plan for their canine patients and guardians.

The Ideal Canine Companion: Re-Exploring Australian Perspectives on Ideal Characteristics for Companion Dogs.
The ideal dog was characterised as medium-sized, with a short- low- or non-shedding coat, and acquired as a puppy from a shelter/rescue. Desired traits included being affectionate, healthy, non-aggressive, safe with children, housetrained, non-destructive when alone, and not prone to escaping.

Mass rabies exposure of veterinary health care workers in Germany: Management, immune response, and tolerability of post exposure-prophylaxis.
In 2008, Germany was declared free from terrestrial rabies by the WOAH. However, illegal pet imports can still lead to rabies exposure, as seen in the 2021 case of a rabid puppy illegally imported to Germany, resulting in a mass exposure (39 veterinary clinic staff) incident.

National survey reveals elastic price sensitivity for select equine veterinary services.
Willingness-to-pay questions were presented with a payment card approach and addressed 3 common services: annual spring vaccinations, lameness examinations, and emergency colic surgeries. In a payment card approach, respondents choose from among preselected values. Respondents were asked to choose the maximum amount they would be willing to pay for each service.

Prevalence of discospondylitis and association with congenital vertebral body malformations in English and French bulldogs.
The prevalence of discospondylitis was 3.4 (1.6-6.7) times higher in French bulldogs and 4.3 (1.7-9.8) times higher in English bulldogs, compared with the overall hospital cohort. One or more vertebral malformations were present in 12 French bulldogs (92.3%), 6 English bulldogs (75.0%), and 1 "other" breed dog (1.1%). Discospondylitis was diagnosed adjacent to congenital vertebral body malformations in 12 (80%) intervertebral discs in French bulldogs and 5 (50%) intervertebral discs in English bulldogs.