Feeds for rain scald, mycotic dermatitis in horses

What is rain scald or mycotic dermatitis in horses

Rain scald, also known as rain rot, mud fever or mycotic dermatitis, is a microbial skin infection that causes sores and scabbing along a horse's body, usually concentrated on the back, rump and legs. These organisms grow under anaerobic conditions, ie in the lack of oxygen. They form lesions and scabs that cause irritation. This generally occurs under wet and humid conditions and high temperatures, where the skin does not effectively dry. The rain washes the protective oils from the coat, leaving it unprotected against these organisms.

Rain scald is usually a relatively minor problem, provided that it receives immediate treatment, and the infectious organisms are stopped from spreading. The infection is spread by either rolling in mud, direct contact between horses, or transmission by stable and house flies carrying the organism from the skin lesions of infected horses.

How do I know my horse has rain scald or mycotic dermatitis

• Itchy skin
• Bald patches
• Hair falling out
• Scabbing of coat

What causes rain scald or mycotic dermatitis in horses

Rain scald is a condition caused by the actinomycetes organism called Dermatophilus congolensis. Actinomycetes is not a bacteria, nor a fungus, however behaves like both a bacteria and a fungus. This condition occurs mainly when the skin is continually wet, hence the name.

The organism that causes rain scald grows best under anaerobic conditions, ie in the absence of oxygen, as will occur when the skin is continually wet, or under the dry scabs caused by the condition. Successful treatments involve elimination of the organism by hygiene, cleaning the infected areas, and maintaining good skin condition.

How diet helps rain scald or mycotic dermatitis in horses

Diet helps to prevent rain scald by ensuring that adequate nutrition and nutrients are provided to the horse to maintain healthy supply skin and coat. Feeding oils helps to make the skin soft and the hair shiny, while also providing a protective barrier to prevent bacteria growth. Amino acids including methionine and cystine assists hair growth.