The extremely wet weather in autumn and winter has led to an increase in the number of cases of MUD FEVER seen by our Vets.
What is Mud Fever?
Mud fever is a bacterial skin infection. The Dermatophylus organism that causes mud fever thrives in damp muddy conditions. The same bacteria is also responsible for the conditions known as 'Cracked Heels', 'Greasy Heel, or 'Rain Scald'.
A case of Cracked Heels.
What are the signs of infection?
The infection usually involves the backs of the pasterns and fetlocks, but can occur anywhere on the lower limbs, the back, and quarters. The affected areas can be quite extensive and can cause swelling, pain and even lameness. The hairs over the area are matted and tufted (so called 'paint brush' lesions) if removed the skin below is red and inflamed and serum oozes to the surface. The picture above shows the typical appearance of cracked heels.
How can mud fever be treated?
Use an antibacterial shampoo to loosen the crusts, dilute pevidine or hibiscrub is ideal (1:40 dilutions). Work the shampoo up to a lather, leave on for 5 minutes and then rinse off and DRY the area. Clip away the hair from around the area as thoroughly as possible (this may require sedation). Once clean an antibiotic ointment can be rubbed into the inflamed area. Severe cases will require antibiotic treatment by your Veterinary Surgeon.
Can mud fever be prevented?
Mud fever can rarely be completely prevented, however you can reduce both the chances of your horse getting mud fever and the severity of the disease. Dry legs thoroughly after exercise in wet conditions. Avoid oily preparations on the legs as these can create a warm moist environment on the skin surface.
Are there other causes of Mud Fever?
Usually mud fever is an easy condition to diagnose, although it can be time consuming and difficult to treat. However occasionally is an underlying disease condition which has made the horse more susceptible to mud fever. For example if only white limbs are affected the horse could have photosensitisation. The case illustrated in the picture above failed to respond to conventional treatments and on investigation was found to have Equine Cushings Disease. Chorioptic mange can cause very similar lesions and is being seen more frequently. Horses with Chorioptic mange are usually very itchy and frequently stamp their feet.
Mud fever can be an unpleasant and painful problem for your horse. All but the most straightforward cases warrant examination and treatment by your Veterinary Surgeon.
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