Op
Open-chest cardiopulmonary resuscitation
see Cardiopulmonary resuscitation
Ophthalmic emergencies
see Eye emergencies
Opioids
in pain management
Drugs Used to Relieve Pain: Opioids
poisoning from
Poisonings from Illicit and Abused Drugs: Opiates
Opisthorchiasis
List of Zoonoses
Optic atrophy
in cats
Disorders of the Optic Nerve in Cats: Optic Atrophy
in dogs
Disorders of the Optic Nerve in Dogs: Optic Atrophy
Optic nerve hypoplasia
Disorders of the Optic Nerve in Cats: Optic Nerve Hypoplasia
Disorders of the Optic Nerve in Dogs: Optic Nerve Hypoplasia
in horses
Disorders of the Optic Nerve in Horses: Optic Nerve Hypoplasia