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Merck Vet Manual LogoMERCK MANUALVeterinary Manual
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  1. <Pet Owners Overview
    Special Pet Topics
    Emergencies
    • Introduction to Emergencies
    • First Aid Kit for a Pet
    • What to Do in a Dog or Cat Emergency
      • What Can I Do for My Pet at the Scene?
      • Unconsciousness
      • Bleeding
      • Burns
      • Choking
      • Foreign Objects
      • Heat Stroke
      • Hypothermia
      • Strangulation Injuries
      • How Do I Move an Injured Animal?
    • Evaluation and Initial Treatment of Dog and Cat Emergencies
      • How Are Trauma Injuries Treated?
        • Fluid Therapy
        • Monitoring Critically Ill Animals
        • Nutrition
        • Pain Control
        • Nursing Care
    • Monitoring and Caring for a Dog or Cat After an Emergency
    • Emergency Care for Horses
      • What Emergency Procedures Are Commonly Performed in Horses?
        • Fluid Therapy
        • Nasogastric Intubation
      • How Should an Injured Horse Be Transported?
      • What Type of First Aid Do Horses Need for Trauma?
        • Eye Injuries
        • Fractures and Dislocations
        • Head Injuries
        • Heat Stroke
        • Wounds and Lacerations
        • Esophageal Obstruction (Choking)
        • Complications After Castration
      • How Should Emergencies in Foals Be Treated?
    • Wound Management
      • Initial Wound Management
      • Drains
      • Bandages
      • Surgery
      • Wound Healing
      • Cuts and Lacerations
      • Bite Wounds
      • Degloving Injuries
      • Gunshot Injuries
      • Pressure Wounds
    • Lightning Strike and Electrical Injury
    • Minor Injuries and Accidents
      • Broken Nails
      • Bumps, Bruises, Twists, and Sprains
      • Fish Hooks
      • Insect Bites and Stings
      • Porcupine Quills
      • Skunking
      • Swallowed Objects
    Diagnostic Tests and Imaging
    • Veterinary Medical Tests
      • Hematology
      • Clinical Chemistry
      • Cytology
      • Fluid Analysis
      • Histology
      • Microbiology
      • Serology
      • Toxicology
    • Common Laboratory Tests in Veterinary Medicine
      • The Veterinarian’s Exam
      • Specialized Tests
      • The In-House Laboratory
      • Chemistry Panel
      • Complete Blood Count (CBC)
      • Fecal Analysis
      • Urine Analysis
      • The Outside Laboratory
    • Diagnostic Imaging
      • X-Ray Imaging
      • Ultrasound
      • Computed Tomography (CT)
      • Magnetic Resonance Imaging (MRI)
      • Nuclear Medicine Imaging
    Infections
    • Introduction to Infections
    • Defenses Against Infection
      • What Are Physical Barriers Against Infection?
      • How Does the Immune System Protect Against Infection?
        • Blood
        • Inflammation
        • Fever
      • What Kinds of Things Affect a Pet's Immune System?
      • What Are the Best Ways to Prevent Infections in Pets?
    • Development of Infection
      • How Does an Infection Start?
      • How Are Infectious Organisms Identified?
    • Infections Caused by Bacteria
      • What Infections Do Bacteria Cause?
      • Bacteremia and Sepsis
      • Septic Shock
    • Infections Caused by Rickettsiae
    • Infections Caused by Fungi
    • Infections Caused by Parasites
    • Infections Caused by Viruses
    Diseases Spread Between Animals and People (Zoonoses)
    • Introduction to Diseases Spread Between Animals and People (Zoonoses)
    • Protecting Yourself From Zoonoses
    • List of Zoonoses
    Drugs and Vaccines
    • Introduction to Drugs and Vaccines
      • What Is Extralabel (Off-Label) Drug Use?
      • How Do Drugs Affect Fetuses and Nursing Young?
    • How Drugs Are Given to Animals
      • How Are Oral Drugs Given?
      • How Are Parenteral Drugs Given?
      • How Are Topical Drugs Given?
    • Drugs for Different Body System Disorders
      • What Drugs Are Used for Heart and Blood Vessel Disorders?
      • What Drugs Are Used for Digestive Disorders?
      • What Drugs Are Used for Eye Disorders?
      • What Drugs Are Used for Bone and Muscle Disorders?
      • What Drugs Are Used for Brain, Spinal Cord, and Nerve Disorders?
      • What Drugs Are Used for Lung and Airway Disorders?
      • What Drugs Are Used for Skin Disorders?
      • What Drugs Are Used for Urinary Tract and Reproductive Tract Disorders?
    • Drugs for Viral Infections
    • Drugs for Inflammation
    • Drugs for Cancers and Tumors
    • Vaccines
      • What Are the Different Types of Vaccines?
      • When Should Vaccinations Be Given?
      • Do Vaccines Have Side Effects?
      • What Is Passive Immunity?
    Pain Management
    • Pain and Pain Management in Pets
      • What Types of Pain Do Animals Feel?
    • Recognizing and Assessing Pain in Animals
    • Pain Treatment in Animals
    • Drugs Used to Relieve Pain in Animals
    • Nondrug Therapies Used to Relieve Pain in Animals
    Poisoning
    • Introduction to Poisoning
      • For More Information
    • Metabolism of Poisons
      • For More Information
    • Factors Affecting the Activity of Poisons
      • For More Information
    • Diagnosis of Poisoning
      • For More Information
    • General Treatment of Poisoning
      • For More Information
    • Algal Poisoning
      • For More Information
    • Arsenic Poisoning
      • For More Information
    • Bracken Fern Poisoning
      • For More Information
    • Cantharidin Poisoning (Blister Beetle Poisoning)
      • For More Information
    • Coal-tar Poisoning
    • Copper Poisoning
      • For More Information
    • Cyanide Poisoning
      • For More Information
    • Ethylene Glycol (Antifreeze) Poisoning
      • For More Information
    • Fluoride Poisoning
      • For More Information
    • Food Hazards
      • Avocado
      • Bread Dough
      • Chocolate
      • Macadamia Nuts
      • Raisins and Grapes
      • Xylitol
      • For More Information
    • Fungal Poisoning
      • Aflatoxicosis
      • Ergotism
      • Estrogenism and Vulvovaginitis
      • Facial Eczema
      • Fescue Poisoning
        • Fescue Lameness
        • Summer Fescue Poisoning
      • Fumonisin Poisoning
      • Mycotoxic Lupinosis
      • Paspalum Staggers
      • Slaframine Poisoning
      • Trichothecene Poisoning
      • For More Information
    • Gossypol Poisoning
      • For More Information
    • Halogenated Aromatic Poisoning (PCB and Others)
      • For More Information
    • Herbicide Poisoning
      • Inorganic Herbicides
      • Organic Herbicides
      • For More Information
    • Household Hazards
      • Alcohols
      • Chlorine Bleaches
      • Corrosives
      • Alkaline Batteries
      • Cationic Detergents
      • Detergents, Soaps, and Shampoos
      • For More Information
    • Insecticide Poisoning
      • Carbamate Insecticides
      • Chlorinated Hydrocarbon Compounds
      • Insecticides Derived from Plants
        • Pyrethrins and Pyrethroids
        • d-Limonene
      • Organophosphates
      • Pesticide Potentiating Agents
      • Solvents and Emulsifiers
      • For More Information
    • Lead Poisoning
      • For More Information
    • Mercury Poisoning
      • For More Information
    • Metaldehyde Poisoning
      • For More Information
    • Nitrate and Nitrite Poisoning
      • For More Information
    • Nonprotein Nitrogen Poisoning (Ammonia Poisoning)
      • For More Information
    • Petroleum Product Poisoning
      • For More Information
    • Plants Poisonous to Animals
      • Houseplants and Ornamentals
      • Range Plants of Temperate North America
      • For More Information
    • Poisoning from Human Over-the-Counter Drugs
      • Antihistamines
      • Decongestants
        • Imidazoline Decongestants
        • Pseudoephedrine and Ephedrine
      • Nonsteroidal Anti-inflammatory Drugs (NSAIDs)
      • Gastrointestinal Drugs
      • Multivitamins and Iron
      • Herbal Supplements
      • Topical Zinc Oxide
    • Poisonings from Human Prescription Drugs
      • Cardiovascular Medications
        • Angiotensin-converting Enzyme (ACE) Inhibitors
        • Calcium Channel Blockers
        • Beta Blockers
        • Diuretics
      • Tranquilizers, Antidepressants, Sleep Aids, and Anticonvulsants
        • Benzodiazepines
        • Antidepressants
        • Barbiturates
        • Sleep Aids
        • Tranquilizers
      • Muscle Relaxants
      • Topical Agents
      • Prescription Nonsteroidal Anti-inflammatory Drugs (NSAIDs)
      • For More Information
    • Poisonings from Illicit and Abused Drugs
      • Cocaine
      • Amphetamines and Related Drugs
      • Marijuana
      • Opiates
      • For More Information
    • Pyrrolizidine Alkaloidosis (Senecio Poisoning, Ragwort Poisoning)
      • For More Information
    • Quercus Poisoning (Oak Bud Poisoning, Acorn Poisoning)
      • For More Information
    • Rodenticide Poisoning
      • Anticoagulant Rodenticides (Warfarin and Related Compounds)
      • Bromethalin
      • Cholecalciferol
      • Zinc Phosphide
      • For More Information
    • Ryegrass Poisoning
      • Annual Ryegrass Staggers
      • Perennial Ryegrass Staggers
      • For More Information
    • Salt Poisoning
      • For More Information
    • Selenium Poisoning
      • Chronic Selenium Poisoning (Alkali Disease)
      • Acute Selenium Poisoning
      • For More Information
    • Snakebite
      • For More Information
    • Sorghum Poisoning (Sudan Grass Poisoning)
      • For More Information
    • Spider Bites
      • Widow Spiders
      • Brown Spiders
      • For More Information
    • Strychnine Poisoning
      • For More Information
    • Sweet Clover Poisoning
      • For More Information
    • Toad Poisoning
      • For More Information
    • Zinc Poisoning
      • For More Information
    Travel with Pets
    • Planning for Travel With Pets
    • Regulations for Traveling With Pets
      • What Are the Regulations for Domestic Travel With Pets?
      • What Are the Regulations for International Travel With Pets?
    • Entering the United States With a Pet
    • Traveling by Car With Pets
    • Traveling by Plane With Pets
    • Traveling by Ship or Train With Pets
    • Traveling With Service Animals
    • Quick Guide for Traveling With Pets
    Health and the Human-Animal Bond
    • The Human-Animal Bond
      • What Are the Health Benefits of Pet Ownership?
    • Therapy and Service Animals
      • What Are Therapy Animals?
      • What Are Service and Working Dogs?
    • Animal Welfare
    • Finding the Right Veterinarian
    • Euthanasia and Pet Loss
      • How Do I Deal With Pet Loss and Grief?
    Cancer and Tumors
    • Introduction to Cancer and Tumors in Animals
      • What Is Cancer?
      • Does Cancer Spread in an Animal?
      • What Types of Cancer Can Animals Get?
    • Causes of Cancer in Animals
      • Are Some Breeds More Likely to Develop Cancer?
      • Is Diet Related to Cancer?
      • What Other Factors Might Cause Cancer in an Animal?
    • Reducing the Risk of Cancer in Animals
      • Will Good Nutrition Keep My Pet From Getting Cancer?
      • How Can I Reduce My Pet's Risk of Cancer?
      • How Do Veterinarians Monitor Pets for Cancer?
    • Cancer Treatment in Animals
      • Can Surgery Help With My Pet’s Cancer?
      • What Is Radiation Therapy?
      • What Is Chemotherapy?
      • What Is Combination Therapy?
    • Caring for a Pet With Cancer
      • What Is Supportive Care?
      • How Do Pets Get Their Medication?
      • Do Pets With Cancer Need Special Diets?
      • What Is Comfort Care (Pet Hospice)?
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