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Human infection with Dermatophilus congolensis
Abstract:
Dermatophilosis is a skin disease in animals and humans caused by the actinomycete Dermatophilus congolensis. This microorganism causes the skin disease in sheep commonly referred to in Australia as "lumpy wool" or mycotic dermatitis. One proven case of human dermatophilosis and two cases with features which are clinically highly suggestive of the disease from South Australia are described. There has been only one previous report of human infection caused by D. congolensis, which was from the United States in 1961. A brief account of the history, characteristics and life cycle of D. congolensis is given. Human infection in Australia may be not uncommon. A diagnosis can be made by direct microscopy of scab material from the lesions. For this purpose, dry scabs should be sent to the laboratory.
Insights
Dermatophilosis, a skin disease caused by Dermatophilus congolensis, affects both animals and humans. This report details human cases in Australia, suggesting it may be more common than previously thought.
Area of Science:
- Veterinary Dermatology
- Zoonotic Diseases
- Microbiology
Background:
- Dermatophilosis is a bacterial skin infection caused by Dermatophilus congolensis.
- The disease commonly affects sheep in Australia, known as 'lumpy wool' or mycotic dermatitis.
- Dermatophilus congolensis is an actinomycete, a type of filamentous bacteria.
Observation:
- This study describes one confirmed and two suspected cases of human dermatophilosis in South Australia.
- The clinical presentation of these cases is detailed.
- This adds to the limited previous reports of human infection globally, with only one prior case documented in the United States in 1961.
Findings:
- The report confirms human dermatophilosis cases in Australia.
- It highlights the potential for Dermatophilus congolensis to cause zoonotic infections.
- Diagnostic methods, including direct microscopy of scab material, are discussed.
Implications:
- Human infection with Dermatophilus congolensis may be underdiagnosed in Australia.
- Increased awareness and diagnostic vigilance for dermatophilosis in humans are warranted.
- Understanding the epidemiology and transmission of this zoonotic disease is crucial for public health.
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