Parasites such as worms, ticks, and fleas circulate widely across Mexico and affect dogs and cats of all ages. Regular veterinary visits and consistent waste hygiene keep your pets safe and prevent parasite transmission to your home.
This is general guidance. Always ask your vet.
Who determines the deworming plan for dogs and cats?
Your veterinarian chooses the antiparasitic products, runs diagnostic panels, and sets the administration schedule for your dog or cat.
Your pet needs an individual parasite control plan based on age, life stage, and living environment.
Your veterinarian performs diagnostic tests to select the correct antiparasitic treatment for your pet's needs.
[S9][S11]How common is heartworm disease in Mexico?
Heartworm affects dogs across 22 of the 32 federal entities in Mexico, with coastal infection rates reaching up to 64.0%.
Dirofilaria immitis spreads through domestic dogs in many regions of the country.
In coastal areas, canine heartworm seroprevalence reaches 48.3% in Ciudad del Carmen, 48.3% in Tampico, and 64.0% in Puerto Morelos.
[S7]What health problems do ticks cause in dogs?
The brown dog tick transmits Ehrlichia canis, which causes severe drops in blood platelets and red blood cells in dogs.
Ehrlichia canis circulates widely among dogs across Mexico.
In the Laguna region of Coahuila, 63.9% of evaluated suspect dogs tested positive for this infection.
Infected dogs develop severe blood complications, with 96.26% showing low platelet counts and 81.25% showing anemia.
[S8]What risks do fleas bring to dogs and cats?
Fleas cause allergic skin inflammation and blood-loss anemia, while spreading bacterial infections and tapeworms to companion animals.
Flea infestations trigger flea allergy dermatitis and blood-loss anemia in pets.
Fleas also transmit bacterial pathogens and tapeworm cysts directly to cats and dogs.
[S10]Why must you keep dog flea treatments away from cats?
Canine topical flea products contain chemical compounds that cause severe muscle tremors and seizures in cats.
Cats have a natural enzyme deficiency that stops them from breaking down concentrated flea and tick treatments formulated for dogs.
Exposure to canine topical parasite products causes severe toxicity in cats.
[S10]Can pet worms infect people?
Children and adults can contract roundworms and hookworms through contact with contaminated soil, sand, and pet feces.
Children ingest roundworm eggs through hand-to-mouth habits after touching contaminated sand or dirt.
Migrating roundworm larvae can reach internal organs and eyes, causing permanent loss of vision.
Hookworm larvae burrow into human skin, producing intensely itchy, winding skin eruptions.
[S9]How do you keep your home and yard clean of pet parasites?
You prevent parasite contamination by removing animal waste promptly and covering outdoor play areas.
Removing waste frequently prevents parasite eggs from developing into infective larvae in the soil.
- Pick up dog feces in your yard daily or every one to two days.
- Bag and remove dog feces immediately during public walks.
- Scoop cat litter boxes every day.
- Empty and wash cat litter boxes with warm water and soap every seven days.
- Keep outdoor sandboxes covered when children are not playing in them.
- Wear shoes on beaches and in parks where roaming dogs and cats defecate.
When should you go to the vet right away?
- Muscle tremors or involuntary twitching
- Seizures or sudden collapse
- Pale gums and extreme weakness indicating severe anemia
- Unexplained bleeding or skin bruising associated with low blood platelets
This is general guidance. Always ask your vet.
Checked against sources; veterinary review pending. Information checked on September 27, 2026. Updated on September 28, 2026.
Written with AI help from the cited sources. A second model checked every fact against them.
Sources
- S7 Prevalence and risk factors of Dirofilaria immitis infection in dogs from Mexico, including serum pre-heat treatment for the dissociation of immune complexes - PMC
- S8 Seroprevalence of Ehrlichia canis in Clinically Suspect Dogs and Its Association with Clinical and Social Factors in Urban and Rural Areas of North-Central Mexico - PMC
- S9 Advice to keep your pet you and your family safe from worms
- S10 Ectoparasiticides Used in Small Animals - Pharmacology - Merck Veterinary Manual
- S11 IMSS advierte riesgos de enfermedades generadas por zoonosis, requieren atención médica inmediata | Instituto Mexicano del Seguro Social | Gobierno | gob.mx
