Hi, I'm starting on my personal crusade to increase public awareness on Valley Fever in memory of my 4 yr. old greyhound Jeffrey who died on 8/16/03 due to complications of Valley Fever. I think the majority of us know that we should have our dogs tick tested especially when they come down with an unidentifiable illness. However, if a dog has been RAISED IN, RACED IN, LIVED IN OR RETIRED in the desert southwest you should also keep Valley Fever in mind. We are reaching epidemic proportions in the State of Arizona alone. Some local vets say they are seeing as much as a 60% increase is diagnosis. Most of you will never have to even think about this nasty fungus but those who have dogs living in or coming out of the desert southwest should always keep it in mind.
The following is a brief primer on the topic. For more information and links, please check out my website Casa de Lorenz.
Canine Valley Fever
The desert southwest (Arizona, New Mexico, Southern California, and Southeast Texas) is a hotbed for coccidiodomycosis. "Cocci" or "Valley Fever" is a fungus that lives in the desert soil and forms spores when released into the air. Spores are released when the contaminated soil is disturbed by construction, farming, etc., and thereafter, the spores are distributed by the wind. Due to increased construction in the East Valley alone, last year there was a dramatic increase in the number of dogs infected with Valley Fever. Some speculate it to be an increase of as much as 60% Periods of rain, which cause fungal growth, are usually followed by more cases diagnosed also. The spores are inhaled by man, dogs, and horses (cats seem to be somewhat resistant), causing the disease, Valley Fever. Valley Fever does not age discriminate - any dog who breathes air in an endemic region can get it. Even dogs accompanying people traveling through these areas or wintering in these warm climates have about the same chance as their owners of being exposed. Valley Fever is not contagious to other pets or family members. Valley Fever is only acquired from the environment. Many dogs in this part of the country become infected with Valley Fever, but do not become visibly ill or have only mild symptoms that are overlooked by owners. In most cases, only a mild respiratory inflammation occurs as the dogs’ defense mechanisms ward off the organisms. However, a lot of dogs are not so lucky and get very sick from the fungus. In severe cases, the disease can spread throughout the lungs and invade other organs. Once the spore has been breathed into the lungs, the spore transforms itself into a larger, multi-cellular structure called a spherule. The spherule grows and will eventually burst, releasing lots of small endospores. These develop into new spherules, and the cycle repeats again and again. This is how the fungus can be spread from the lungs through the bloodstream to other organs.
Symptoms to Watch For:
Swelling of Joints
Poor Appetite or Anorexia
Weight Loss
Chronic Coughing
Skin Abscesses
Limping or lameness
Bone Pain
Spinal Pain
Incoordination
Seizures
Swollen Lymph Nodes
If your pet is exhibiting any of the signs listed above, you should contact your veterinarian as soon as possible. Catching the disease a few weeks early may save months or years of treatment down the road.
The good news is that most dogs, with adequate Antifungal therapy such as Fluconazole (Diflucan), Itraconazole (Sporanox), Ketoconazole (Nizoral), do recover from this disease. The majority are able to get off medication and live a normal life. They are probably immune for the rest of their lives from a new infection, though sometimes an animal will have an old infection become active again. A small portion of animals must take medication for life, and another small portion, unfortunately, will die of Valley Fever in spite of aggressive drug treatment. This most commonly happens when there is a disseminated infection.
Thank you for taking the time to read this post.