Disease Library

A comprehensive reference covering feline diseases across every major body system — causes, symptoms, diagnosis, treatment, and prevention.

505 results
parasitic

Aelurostrongylus abstrusus Infection (Feline Lungworm)

Infection with a parasitic worm that resides in the lungs, transmitted through an indirect life cycle involving slugs or snails as…

infectious

Bartonellosis (Cat Scratch Disease)

An infection with Bartonella henselae bacteria, notable specifically because cats are the primary reservoir and can transmit it to humans…

parasitic

Ctenocephalides felis infestation (cat flea)

Fleas are the most common external parasite of cats worldwide. Beyond the itching and discomfort they cause directly, fleas are a vector…

skin

Feline Acne (Detailed Chronic Management)

While feline acne is discussed generally elsewhere in skin conditions, this addresses detailed considerations for genuinely chronic,…

endocrine

Feline Acromegaly

A hormonal condition caused by excessive growth hormone production, almost always from a benign tumor of the pituitary gland, resulting in…

endocrine

Feline Acromegaly (Complications and Detailed Management)

While Acromegaly is covered generally in another entry as a growth-hormone-excess condition, this addresses the specific complications and…

infectious

Feline Actinomycosis

A bacterial infection caused by Actinomyces species, typically entering through a bite wound or penetrating injury — genuinely notable for…

kidney

Feline Acute Kidney Injury (AKI) / Acute Renal Failure

A sudden, often severe decline in kidney function occurring over hours to days, in contrast to the gradual, progressive course of chronic…

endocrine

Feline Adrenal Gland Hemorrhage

A genuinely rare condition where bleeding occurs within one or both adrenal glands, potentially resulting from significant trauma, a…

respiratory

Feline allergic bronchitis / asthma

Feline asthma is a chronic allergic airway condition caused by inflammation and constriction of the small airways, similar in concept to…

poisoning toxicology

Feline Allium Toxicosis (Onion, Garlic, Chive, Leek Poisoning)

Poisoning from plants in the Allium genus — onions, garlic, chives, and leeks — which damage red blood cells, potentially leading to a…

poisoning toxicology

Feline Allium-Containing Processed Food Toxicosis

While direct onion/garlic toxicosis is covered in another entry, this addresses the genuinely important related concern of allium exposure…

skin

Feline Alopecia Areata

A genuinely rare, believed immune-mediated condition causing patchy hair loss without other significant skin changes (unlike many other…

cancer

Feline Anal Sac Adenocarcinoma

A malignant tumor arising from the anal sac glands, genuinely much less commonly diagnosed in cats compared to dogs, where this tumor type…

digestive

Feline Anal Sac Disease

A condition affecting the anal sacs (small glands located near the anus that normally release a small amount of scent-marking secretion…

digestive

Feline Anal Sac Impaction

A blockage of the small anal sacs located near the anus, distinct from anal sac infection or abscess (which can develop as a consequence of…

infectious

Feline Anaplasmosis

A tick-borne bacterial infection genuinely much less commonly diagnosed in cats than in dogs, where this infection is more extensively…

emergency trauma

Feline Anesthetic Adverse Reaction

An unexpected, adverse response to anesthesia during a medical procedure, genuinely uncommon given modern anesthetic protocols and…

emergency trauma

Feline Anesthetic Complications

Adverse events occurring during or after anesthesia, ranging from mild, self-resolving effects to genuinely serious complications — while…

eye

Feline Anisocoria

A finding where the two pupils are of unequal size, which is itself a sign or symptom rather than a standalone diagnosis — genuinely…

eye

Feline Anterior Lens Luxation with Secondary Glaucoma

While lens luxation is covered generally in its own entry, this addresses the specific, genuinely urgent complication where the displaced…

heart

Feline Arterial Thromboembolism (ATE)

A sudden, severe complication where a blood clot (thrombus) forms, typically within an enlarged heart chamber affected by underlying heart…

musculoskeletal

Feline Atlantoaxial Instability

A condition involving instability at the specific junction between the first two neck vertebrae (atlas and axis), genuinely rare in cats…

skin

Feline Atopic Dermatitis / Environmental Allergy

An allergic skin condition triggered by environmental allergens (like pollen, dust mites, or mold), causing itchiness and associated skin…