When we think about summer risks for pets, heat stress is usually the first concern that comes to mind. But behind soaring temperatures lies a less visible — yet equally serious — threat: heightened activity among parasites like ticks, fleas, and mosquitoes. These pests can transmit dangerous diseases to dogs — and, to a lesser extent, cats.
A Changing Risk Landscape
This isn’t just another seasonal cycle. Warmer spring days, milder winters, and prolonged periods of high temperatures are creating ideal conditions for many parasite species to survive and multiply. As a result, the window during which pets need protection has expanded well beyond the traditional two or three summer months.
The Silent Tick: A Stealthy Carrier of Disease
Unlike mosquitoes, ticks often go unnoticed. Their small size belies the danger they carry — particularly as the primary vector of leishmaniasis, a parasitic disease still prevalent across Mediterranean countries. Left undiagnosed, leishmaniasis can affect multiple organs and lead to severe complications. Symptoms such as weight loss, skin lesions, extreme fatigue, swollen lymph nodes, or kidney problems may not appear immediately — making prevention more critical than ever.
Fleas Are More Than Just a Nuisance
A walk through dense vegetation — or even a backyard — can be enough for a flea to latch onto a dog’s coat. Beyond causing irritation, fleas can transmit serious illnesses including ehrlichiosis, anaplasmosis, and babesiosis. These conditions require prompt diagnosis and treatment. Veterinarians recommend thorough checks after every outdoor excursion — especially around the ears, neck, armpits, between the toes, and the abdominal area — where fleas commonly attach.
Mosquitoes: More Than Just Itchy Bites
Often dismissed as a mere annoyance, mosquitoes can transmit heartworm disease — also known as canine dirofilariasis. Primarily affecting dogs, this condition severely impacts the heart and lungs, especially when diagnosis is delayed. Stagnant water, humidity, and lush vegetation all support mosquito breeding, significantly increasing exposure risk during summer months.
Why Prevention Has Evolved
Just a few years ago, many pet owners started anti-parasite protection at the beginning of summer and stopped once autumn arrived. Today, that approach is being reconsidered. Rising average temperatures and milder winters have extended the active season for many parasites — meaning the risk in much of Greece no longer ends with summer.