Dec 06 2012

Parasites in Calgary

A small group of local veterinarians have recently completed a study in which they set out to discover the prevalence of parasites in our pets.

The study was done over one year and involved almost 1000 cats and dogs – the largest ever done in Calgary.

They acquired their samples from a variety of clinics across the city and from the Calgary Humane Society. The only conditions were that the animals were living in the city and had not been de-wormed in the past six months.

The study is due to be published in 2011.

Roundworms (dogs)

< 1yr: 4.2%
1-2yr: 1.1%
> 2yr: 0.4%

< 1yr: 19%
1-2yr: 16%
> 2yr: 3.5%


all: 1.1%

all: 9.2%

< 1yr: 5.3%
1-2yr: 0%
> 2yr: 0%

< 1yr: 10.3%
1-2yr: 12.5%
> 2yr: 7.2%

Toxocara is a zoonotic parasite (can be spread to humans). It can present itself in three different forms; one of which is responsible for causing blindness in an estimated 100 childern every year in the U.S.A.


< 1yr: 17.5%
1-2yr: 9.8%
> 2yr: 4.2%

< 1yr: 10.6%
1-2yr: 0
> 2yr: 1.8%

There is a higher prevalence of giardia here than in most other studies done in the U.S.A. Despite some speculation, there are zoonotic forms of giardia.

Additional Information

• 20-30% of playground dirt has roundworm eggs in it
• an estimated 80%+ of coyotes carry toxocara; a study by the Faculty of Veterinary Medicine at the University of Calgary is being conducted to learn the prevalence of parasites in coyotes that surround the city of Calgary.

Lifelearn Admin | Uncategorized

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