WHAT ARE THE DISEASES THAT THREATEN BOTH OWNERS AND THEIR PETS?

We know you’re concerned about your pet’s health and want to protect them from disease. But did you know that parasites such as ticks and fleas can also transmit illnesses to humans?

Zoonotic diseases are caused by a wide range of microscopic parasites

Known as zoonotic diseases, they are caused by a wide range of microscopic parasites, such as tiny worms, and bacteria, and some of them can be transmitted between humans and animals by external parasites such as insects and ticks which are called vectors.  

They are particularly worrying as they can have an extremely negative impact on both two- and four-legged members of our families.  

But how big a threat are they? 

Worldwide, there are 1.3 million new leishmaniosis cases each year1.  

In Europe alone, there more than 360,000 cases of Lyme disease have been reported in the last two decades2

The World Health Organization estimates that more than half the world is at risk of illnesses that are transmitted by external parasites, and many of these are zoonotic3

And thanks to rising temperatures across the planet, the insects, ticks and other creatures which spread zoonotic diseases are on the march into new territories, threatening cat health, dog health, and human health.  

Parasite expert Ezio Ferroglio explains: 

Ezio Ferroglio

“FROM A SURVEY OF PEOPLE WHO GO TO THE EMERGENCY ROOM WITH A TICK ON THEIR PERSON, WE SAW THAT ONE OUT OF THREE OF THESE TICKS WAS INFECTED WITH A PARASITE THAT CAN ALSO NEGATIVELY AFFECT HUMANS.”

The following zoonotic diseases are currently a clear and present danger to humans and pets alike:  

Leishmaniosis 

Caused by a protozoan microscopic parasite and transmitted by vectors such as sandflies, leishmaniosis affects dogs, cats and humans. The disease can cause multiple organ failures and skin lesions. Its sandfly vector is widely distributed in southern Europe.

Babesiosis 

Also known as piroplasmosis, this disease is caused by protozoa, spread by certain ticks. Even though the protozoan that causes piroplasmosis in dogs is not the same one that causes it in humans, more ticks means more risk for both!

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Dirofilariosis 

Microscopic worms cause dirofilariasis and are transmitted by mosquitoes. One type of dirofilariosis can cause heart failure in dogs and cats, and lung problems in people; this is found mostly in southern Europe. Another type of dirofilariosis affects the skin of dogs, cats and people; this has spread all the way up to the Baltics.  

Ehrlichiosis 

The primary symptom of ehrlichiosis is anemia in dogs and cats. It is caused by a bacterium and transmitted via ticks. The tick vector is present in southern Europe.  

Lyme disease  

Borreliosis or Lyme disease is caused by bacteria, transmitted via ticks. The vector is distributed throughout Europe. A serious condition in humans, it can manifests with fever, rashes, muscle and joint issues and neurological disease.

Pet diseases can be transmitted via ticks

Bartonellosis 

Widely known as “cat scratch disease,” bartonellosis is caused by a bacterium and spread by the cat flea and distributed worldwide. Bartonellosis can have lethal consequences for some people and is seen mostly in immunosuppressed humans. Symptoms include fever, enlarged lymph nodes, and inflammations of the eyes, gums, and heart. Protecting pets from fleas year-round can prevent bartonellosis from spreading to humans.  

An evolving threat

There are around 1,500 known human infectious diseases, around 60% of these are zoonotic4. Some of them are newly evolved while others have existed but are becoming more frequent due to geographical expansions and humans settling in new areas and becoming exposed to species for the first time.  

As an example of how zoonotic diseases are spreading, the following short video explains the incidence of new parasites that have started appearing in Central Europe.  

Information is key to pet protection 

A knowledgeable veterinarian is your pet’s best ally against the spreading threat of zoonotic diseases. And since these illnesses affect people too, informed pet care professionals and effective, year-round parasite control can positively impact the health of the human members of your family.  

But as dedicated pet owners, we also must play our part by remaining up to date with the latest, trustworthy information.  

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1. World Health Organization. (2014). A global brief on vector-borne diseases (No. WHO/DCO/WHD/2014.1). World Health Organization. 

2. WHO Regional Office for Europe & European Centre for Disease Prevention and Control (EDCD). (no date). Lyme Borreliosis in Europe. World Health Organization. https://www.euro.who.int/__data/assets/pdf_file/0008/246167/Fact-sheet-Lyme-borreliosis-Eng.pdf

3. World Health Organization. (2014). A global brief on vector-borne diseases (No. WHO/DCO/WHD/2014.1). World Health Organization.

4. Hoberg, E. P., & Brooks, D. R. (2015). Evolution in action: climate change, biodiversity dynamics and emerging infectious disease. Torgerson, P. R., & Macpherson, C. N. (2011). The socioeconomic burden of parasitic zoonoses: global trends. Veterinary Parasitology, 182 (1), 79-95.

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