04/23/2025
Good Read!
April showers bring…
…the increased risk of your horse developing a skin condition like rain rot, a contagious bacterial skin disease (often mistaken for a fungal condition) called dermatophilosis which is caused by the bacterium "Dermatophilus congolensis.”
How does rain rot happen?
The organism responsible for rain rot lives in the outer layer of the skin; if the skin is compromised by too much moisture or cracks, or if the horse has a weaker immune system, it’s easier for the pathogen to activate and establish an infection that causes from pinpoint to large, crusty scabs (pro tip: Your horse will NOT thank you for picking at them!).
Why should you not mistake rain rot for a fungal disease?
Antifungal medications and topicals have no effect on the bacteria responsible for rain rot, therefore diagnosing the condition correctly is critical! If left untreated, the condition can even progress to a point where it opens the door for more serious, secondary skin infections. It’s also important to note that this organism is contagious and may be passed to other horses by tack, equipment or insects, therefore disinfection of equipment is vital to prevent spread.
If you suspect your horse has rain rot, be sure to consult your veterinarian on the best treatment plan. While there are a million over-the-counter products available, your horse doctor may have cause to prescribe a specific course of action based on the severity of your horse's case.