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Dermatophytosis (view source)

Revision as of 17:06, 6 January 2023

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Also known as: '''''Ringworm'''''
 
Also known as: '''''Ringworm'''''
    
== Introduction  ==
 
== Introduction  ==
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[[Image:Microsporum canis lesions.jpg|thumb|right|200px|<small><center><i>Microsporum canis</i> alopecia and scaling lesions (Courtesy of Bristol BioMed Image Archive)</center></small>]] [[Image:Ringworm dog.jpg|thumb|right|200px|<small><center>Ringworm in a dog (Courtesy of Bristol BioMed Image Archive)</center></small>]] [[Image:Trichophyton mentagrophytes dog.jpg|thumb|right|200px|<small><center>Trichophyton mentagrophytes in a dog (Courtesy of Bristol BioMed Image Archive)</center></small>]]  
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[[Image:Microsporum canis lesions.jpg|thumb|right|200px|<small><center><i>Microsporum canis</i> alopecia and scaling lesions (Courtesy of Bristol BioMed Image Archive)</center></small>]] [[Image:Ringworm dog.jpg|thumb|right|200px|<small><center>Ringworm in a dog (Courtesy of Bristol BioMed Image Archive)</center></small>]] [[Image:Trichophyton mentagrophytes dog.jpg|thumb|right|200px|<small><center>''Trichophyton mentagrophytes'' in a dog (Courtesy of Bristol BioMed Image Archive)</center></small>]]  
 
Dermatophytes are pigmented, saprophytic organisms called Phaeohyphomycetes and were previously called 'Fungi Imperfecti'. The two main species of veterinary interest are ''Microsporum'' and ''Trichophton ''and these are found worldwide.  
 
Dermatophytes are pigmented, saprophytic organisms called Phaeohyphomycetes and were previously called 'Fungi Imperfecti'. The two main species of veterinary interest are ''Microsporum'' and ''Trichophton ''and these are found worldwide.  
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Dermatophytes are transmitted by direct or indirect contact e.g. on brushes, fomites etc. Signs vary in severity, but immunocompromised hosts may develop systemic infections.  
 
Dermatophytes are transmitted by direct or indirect contact e.g. on brushes, fomites etc. Signs vary in severity, but immunocompromised hosts may develop systemic infections.  
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There are certain types of dermatophytes: ''Microsporum'' is zoophilic and so parasites of animals, ''Trichophyton'' is geophilic and inhabits soil but will also parasitise animals. ''Epidermophyton'' is anthropophilic and so is a parasite of people.  
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There are certain types of dermatophytes: ''Microsporum'' is zoophilic and so parasitises animals, ''Trichophyton'' is geophilic and inhabits soil but will also parasitise animals. ''Epidermophyton'' is anthropophilic and so is a parasite of people.  
    
''Microsporum canis'' is the most common dermatophyte to infect small animals and will be the cause of 90% of feline infections and 60% of canine infections. ''Trichophyton mentagrophytes'' affects around 30% of dogs, especially Terrier breeds. ''Trichophyton verrucosum'' causes most cases in cattle and sheep and ''Trichophyton equinum'' is the commonest cause in horses.
 
''Microsporum canis'' is the most common dermatophyte to infect small animals and will be the cause of 90% of feline infections and 60% of canine infections. ''Trichophyton mentagrophytes'' affects around 30% of dogs, especially Terrier breeds. ''Trichophyton verrucosum'' causes most cases in cattle and sheep and ''Trichophyton equinum'' is the commonest cause in horses.
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About 25% of wild hedgehogs are carriers of ''Trichophyton erinacei'' which can also infect dogs and humans.
    
== Signalment ==
 
== Signalment ==
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Image:Dermatophytosis dog foot.jpg|<center><p>'''Dermatophytosis lesion on a dog's leg'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
 
Image:Dermatophytosis dog foot.jpg|<center><p>'''Dermatophytosis lesion on a dog's leg'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
 
Image:Dermatophytosis in a horse.jpg|<center><p>'''Dermatophytosis in a horse'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
 
Image:Dermatophytosis in a horse.jpg|<center><p>'''Dermatophytosis in a horse'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum canis.jpg|<center><p>'''Microsporum canis'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum canis.jpg|<center><p>'''''Microsporum canis'''''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum canis macroconidium.jpg|<center><p>'''Microsporum canis macroconidium'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum canis macroconidium.jpg|<center><p>'''''Microsporum canis ''macroconidium'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:T.mentagrophytes.jpg|<center><p>'''T.mentagrophytes'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:T.mentagrophytes.jpg|<center><p>'''''T. mentagrophytes'''''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum canis dysgonic.jpg|<center><p>'''Microsporum canis dysgonic at 3 weeks'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum canis dysgonic.jpg|<center><p>'''''Microsporum canis'' dysgonic at 3 weeks'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center>
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Image:Microsporum equinum.jpg|<center><p>'''Microsporum equinum'''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center></gallery>
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Image:Microsporum equinum.jpg|<center><p>'''''Microsporum equinum'''''</p><sup>Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath</sup></center></gallery>
 
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== Test yourself with the Dermatophytosis Flashcards ==
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{{Learning
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|Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis00124.asp Dematophytosis in dogs]
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|flashcards = [[Dermatophytosis - Flashcards|Dermatophytosis Flashcards]] <br>[[Small Animal Dermatology Q&A 08]]<br>[[Small Mammals Q&A 20]]
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}}
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[[Dermatophytosis - Flashcards|Dermatophytosis Flashcards]]
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{{Chapter}}
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{{Mansonchapter
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|chapterlink = http://www.mansonpublishing.co.uk/book-images/9781840760491_sample.pdf
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|chaptername = Ringworm
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|book = Sheep Medicine
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|author = Philip R. Scott
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|isbn = 9781840761498
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}}
    
== References ==
 
== References ==
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{{review}}
 
{{review}}
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==Webinars==
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<rss max="10" highlight="none">https://www.thewebinarvet.com/dermatology/webinars/feed</rss>
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[[Category:Expert_Review]] [[Category:Dermatological_Diseases_-_Dog]] [[Category:Dermatological_Diseases_-_Cat]][[Category:Dermatological_Diseases_-_Horse]][[Category:Dermatological_Diseases_-_Cattle]][[Category:Dermatological_Diseases_-_Sheep]][[Category:Cutaneous_Mycoses]]
 
[[Category:Expert_Review]] [[Category:Dermatological_Diseases_-_Dog]] [[Category:Dermatological_Diseases_-_Cat]][[Category:Dermatological_Diseases_-_Horse]][[Category:Dermatological_Diseases_-_Cattle]][[Category:Dermatological_Diseases_-_Sheep]][[Category:Cutaneous_Mycoses]]
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[[Category:Zoonoses]]
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