White nose syndrome has decimated bat populations in North American, and a recent study validates previous predictions that the loss of this species and its role in biological pest control would negatively impact agriculture.  |  File photo

Study finds bat population crash increases insecticide use

I’ve written before in this column about the bat disease that has decimated North American populations. As a brief refresher, white nose syndrome is a disease caused by a fungal pathogen that was introduced into the state of New York in 2006. The fungus causes a skin infection, making a characteristic white fuzz around the […] Read more

Mosquitoes not only spread viruses but also parasites, such as the one that causes heartworm infections in dogs and cats.  |  File photo

Mosquitoes can spread significant animal pathogens

As with my previous column on flies, it is hard to come up with anything positive to write about mosquitoes. In an optimistic take on these tiny insects, Ned Flanders from the TV show The Simpsons commented, “sure are fun to scratch — satisfying.” There are approximately 3,600 known species of mosquitoes ,and scientists classify […] Read more

The parasite, Strongylus vulgaris, was considered to be well controlled by modern deworming medications. However, veterinary pathologists at the University of Calgary undertook the study after noticing an apparent increase in the number of horses affected by this parasite. | File photo

Study shows deadly horse parasite alive and well in Alberta

A recent Alberta study of horses found that a particular parasitic infection is more common than previously thought. The parasite, Strongylus vulgaris, was considered to be well controlled by modern deworming medications. However, veterinary pathologists at the University of Calgary undertook the study after noticing an apparent increase in the number of horses affected by […] Read more



A study of cases in which dogs were poisoned by rodenticides found that nearly half of them had bleeding into their chest cavities, which can be difficult to identify.  |  File photo

Most rodenticide-poisoned dogs survive with treatment

Rodent poisons, also known as rodenticides, have long presented a hazard to animals other than their intended victims. Dogs and wildlife such as owls, hawks, eagles and other raptor bird species are frequently exposed to these products. The consequences of poisonings have increased with development of second-generation products, which have a significantly longer effect on […] Read more



Medical conditions that can affect draft horses such as Clydesdales include exertional rhabdomyelitis and a disorder of the larynx.  |  File photo

Draft horses are susceptible to unique health challenges

Once the mainstay of prairie agriculture, draft horses are now much less common. The most familiar breeds on the Prairies include Belgiums, Percheron, Clydesdales and Shires. Horses, including draft breeds — and also thoroughbreds — can suffer from a disorder of the larynx. Nerve damage inactivates the muscle that normally opens and closes the left […] Read more



In this severely arthritic knee joint from a horse, the rough bone is a response to cartilage damage.  |  Jamie Rothenburger photo

Prompt action needed to alter joint disease trajectory

Joints are an essential component of the musculoskeletal system, bringing motion to what would otherwise be a rigid system of bones. And of course, it is the combination of bones, joints and muscles that scaffold the body’s organs and allows movement. Healthy joint cartilage requires frequent movement. Compressive forces squeeze joint fluid out of the […] Read more

When the weather turns dry and hot later in summer, evaporating water leaves anthrax spores concentrated in what water is left. | File photo

Possible drought this summer may increase anthrax risk

Limited snowpack this winter combined with low precipitation in previous years has raised the alarm for severe drought conditions on the Prairies this summer. One of the more serious diseases to arise in these challenging weather conditions is anthrax. Caused by the bacterium Bacillus anthracis, anthrax is an ancient and global disease. The earliest references […] Read more