Veterinário Raiz

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Dog health: parasites, infections and prevention

Quick answer

Most serious infectious and parasitic diseases of dogs are preventable. Keep core vaccines up to date (they protect against parvovirus and distemper), give heartworm prevention year-round with an annual test as the American Heartworm Society recommends, and use year-round flea and tick control as CAPC advises. Vaccinate for kennel cough organisms based on lifestyle. See a veterinarian promptly for vomiting with diarrhea in puppies, coughing with fever, or any sudden illness.

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Dog health: parasites, infections and prevention
Heartworm, fleas and ticks, kennel cough, parvo and distemper: symptoms, prevention and when to see a veterinarian.

Prevention covers most of the risk

Many of the most serious diseases in dogs are preventable with routine care: vaccines, parasite prevention and regular checkups. The articles in this section explain each condition, but the core plan is short.

Threat Prevention Key source
Parvovirus Puppy vaccine series and boosters Merck Veterinary Manual
Distemper Core vaccines Merck Veterinary Manual
Kennel cough Lifestyle vaccines (Bordetella, parainfluenza, adenovirus-2) Merck Veterinary Manual
Heartworm Prevention 12 months a year; test every 12 months American Heartworm Society
Fleas and ticks Year-round control for every pet in the home CAPC

When to see a veterinarian right away

  • A puppy with vomiting or diarrhea, especially before its vaccines are complete
  • Coughing with fever, thick nasal discharge or lethargy
  • Difficulty breathing, collapse or pale gums
  • Seizures or twitching
  • Suspected poisoning

How often to see the vet

The Merck Veterinary Manual recommends visits twice a year or more for senior dogs over 7–8 years old. Puppies need several visits for their vaccine series, and healthy adults at least an annual checkup with heartworm testing.

For emergencies, keep a dog first aid kit and read the pet first aid guide. Nutrition matters too: see the dog food guide.

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