breed-predisposition

# Breed Predisposition ## Overview Incorporate breed-specific disease predispositions into clinical reasoning. Different breeds have dramatically different risk profiles for hundreds of conditions. A Cavalier King Charles Spaniel presenting with a murmur should have mitral valve disease at the top of the differential list. A Doberman with syncope should be evaluated for dilated cardiomyopathy. This skill encodes these breed-disease associations to improve differential diagnosis ranking. ## When to Use - User provides a breed along with clinical signs - User asks "what diseases is [breed] predisposed to?" - User is building a differential diagnosis list and breed is known - User asks about genetic testing for a specific breed - User asks about breed-specific screening recommendations - Keywords: breed, predisposed, genetic, hereditary, screening, risk ## Key Databases - **OMIA** (Online Mendelian Inheritance in Animals, https://omia.org): Curated catalog of inherited disorders and traits in animals. Maintained by University of Sydney. - **VBO** (Vertebrate Breed Ontology): 19,500+ breed concepts across 49 species with standardized nomenclature. - **OFA** (Orthopedic Foundation for Animals): Breed-specific health data and screening statistics. - **Breed-specific health surveys** from national kennel clubs (AKC, KC UK, FCI affiliates). ## Workflow 1. **Standardize the breed name.** Map common names, abbreviations, and regional variants to a canonical breed identifier. Examples: - "GSD" / "German Shepherd" / "Alsatian" -> German Shepherd Dog - "Doodle" -> Clarify: Labradoodle, Goldendoodle, or other cross - "Pit Bull" -> Clarify: American Pit Bull Terrier, American Staffordshire Terrier, or Staffordshire Bull Terrier - Mixed breeds: Note that predisposition data is breed-specific; mixed breeds may carry any combination 2. **Retrieve known predispositions.** For the identified breed, list conditions with documented increased risk. Organize by body system: - Cardiovascular (e.g., CKCS: mitral valve disease; Doberman: DCM; Boxer: ARVC) - Orthopedic (e.g., Labrador: hip/elbow dysplasia, CCL rupture) - Neurologic (e.g., IVDD in Dachshunds, syringomyelia in CKCS) - Dermatologic (e.g., atopic dermatitis in West Highland White Terriers) - Endocrine (e.g., hypothyroidism in Golden Retrievers) - Oncologic (e.g., hemangiosarcoma in Golden Retrievers, osteosarcoma in large breeds) - Ophthalmic (e.g., PRA in many breeds, entropion in Shar-Peis) - Other genetic conditions 3. **Rank by prevalence and clinical relevance.** Not all predispositions are equally important. Prioritize conditions that are: - Common in the breed (high prevalence) - Clinically significant (not cosmetic variants) - Relevant to the presenting complaint (if one is given) - Screenable or testable (actionable information) 4. **Note available genetic tests.** For conditions with known genetic basis, indicate whether a DNA test is commercially available and from which lab. 5. **Include screening recommendations.** For breeds with established screening protocols (e.g., cardiac screening for Dobermans, hip scoring for Labradors), note the recommended screening age and method. ## Output Format When breed is provided with clinical signs: ``` ## Breed Considerations: [Breed] presenting with [signs] **Elevated differentials based on breed predisposition:** 1. [Condition] -- [Breed] has [X-fold] increased risk; [prevalence if known] 2. [Condition] -- [Reason for elevation] **Recommended breed-specific diagnostics:** - [Test] to evaluate for [condition] **Genetic testing available:** - [Test name] from [Lab] for [condition] ``` When asking about breed predispositions generally: ``` ## Known Predispositions: [Breed] **High-priority conditions:** - [System]: [Condition] -- [Brief note on prevalence/severity] **Recommended screening:** - [Age]: [Screening test] for [condition] **Available genetic tests:** - [Gene/mutation]: [Test] -- [Lab] **Source:** OMIA, OFA breed statistics, [relevant breed health survey] ``` ## Limitations - Predisposition data is strongest for popular purebred dogs. Data for mixed breeds, cats, horses, and exotic species is more limited. - "Predisposed" means increased risk, not certainty. A breed predisposition does not confirm a diagnosis. - Prevalence data varies by geographic population. UK breed data may not perfectly match US or Australian populations. - New genetic discoveries are ongoing. This skill should be supplemented with current literature. - For mixed breeds and designer crosses, predispositions from contributing breeds may or may not apply depending on actual genetic inheritance.