Along
with blustery winter weather, some have seen complications in horse
health. Some will tell you that this
winter, they can feel small lumps on their horse’s skin or hair. Maybe it’s
rain rot, how do you know? What is rain
rot?
Rain
rot, rain scald or Dermatophilosis, as it is sometimes referred to, is one of
the most common skin infections seen in horses. It is caused by a bacterial infection, it can often be
mistaken for a fungal disease. The bacterial organism acts like both bacteria
and fungus.
It lives in the outer layer
of the skin and causes large and small crusty scabs and matted tufts
of hair. There are usually dozens of tiny scabs that
have hair attached and easily come out.
Sometimes after removing the scabs, the skin is pink with pus but becomes
gray and dry as it heals. This condition is
not life-threatening.
Rain
rot usually appears first on the horse's back and rump, it can also be on the
back of the fetlock, front of the cannon bone, tips of the horse's ears and
around the eyes and muzzle.
Typically,
it is not painful to the horse. The scabs do not seem to cause an itchy feeling
either. Removing the scabs may be painful to the horse. Remove the scabs slowly and gently. Many of the scabs may be brushed out when the
coat is dry and sometimes wetting the area may be helpful in removing
them.
A
horse can become infected by sharing equipment, blankets, leg wraps and brushes
with other infected horses. The best way to prevent rain rot transmission
between horses, is to use a disinfectant on any shared equipment after each
use. Check with your veterinarian to see what disinfectant he/she
recommends for use on your tack.
In
order to thrive, the organism needs a warm, moist environment. A secondary bacterial infection may occur. It
is very important to treat rain rot immediately. Any secondary infection may be quite
resistant and more difficult to treat.
Rain rot can sometimes resolve without treatment. Some horses can get rid of it as they shed out their winter hair coat. However, it is not advisable to let the condition continue, don’t wait to see if it will just go away. Begin treatment as soon as you realize your horse has the condition, preventing it from getting any worse!
Dermatophilus congolensis, the bacterial culprit, grows better with a lack of oxygen. Since it doesn't like oxygen, you'll have to eliminate the heavy hair coat, and remove any scabs that hold the organism to the horse's skin. It is not a good idea to use ointments, since they hold moisture and moisture needs to be removed for the condition to resolve. The best treatment is to wash the horse with veterinarian recommended antimicrobial and antibacterial shampoos and rinses. These medications help to kill the organism.
Rain rot can sometimes resolve without treatment. Some horses can get rid of it as they shed out their winter hair coat. However, it is not advisable to let the condition continue, don’t wait to see if it will just go away. Begin treatment as soon as you realize your horse has the condition, preventing it from getting any worse!
Dermatophilus congolensis, the bacterial culprit, grows better with a lack of oxygen. Since it doesn't like oxygen, you'll have to eliminate the heavy hair coat, and remove any scabs that hold the organism to the horse's skin. It is not a good idea to use ointments, since they hold moisture and moisture needs to be removed for the condition to resolve. The best treatment is to wash the horse with veterinarian recommended antimicrobial and antibacterial shampoos and rinses. These medications help to kill the organism.
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