Dermatophyte-What Is It ,Clinical Types,Lab Diagnosis And Treatment

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 DERMATOPHYTE 

  • Infection caused by fungi is known as mycosis 
  • Types:
  1. Superficial
  2. Subcutaneous
  3. Systemic

SUPERFICIAL :

  • Affect surface 
Types :
  • Superficial infection
 Example -Tinea nigra,Piedra
  • Cutaneous :Dermatophyte 

DERMATOPHYTE :

  • Superficial mycoses that affect only superficial keratinised tissue (hair,skin,nail)
  • Break down and utilise keratin
  • Infection caused it DERMATOPHYTOSES,tinea or ringworm





GENUS ORDER 

  1. TRICHOPHYTON-Hair,skin,nail
  2. MICROSPORUM-hair,skin
  3. EPIDERMOPHYTON-skin,nail

CLINICAL TYPES:

  • Named based on site of involvement 
  • Scalp-tinea capitis
  • Groin-tinea cruris
  • No hair involvement -tinea corporis
  • Foot-tinea pedis or athlete's foot
  • Beard -tinea barbae or barber's itch
  • Chronic type with hair involvement is called FAVUS 
  • FAVUS is followed by alopecia and scaring
  • Its of two types ectothrix,endothrix
  • Atherospore sheath over the hair shaft-ectothrix
  • Atherospore within hair shaft -endothrix





LAB DIAGNOSIS :

SPECIMEN :

  • Hair scraping,skin scraping ,nail

DIRECT MICROSCOPY 

  • 10%KOH mount to view hyphal growth 

CULTURE :

  • 25-30 degree celsius for 3 weeks :incubation
  • SDA AND SDA used with antibiotics
  • (SABORAYDERED DEXTROSE AGAR) 
Colony Characteristic 
  • Pigment 
  • Macroconidia
  • Microconidia 
Colony Characteristic :
  • White to creamy ,cotton growth 
  • Reverse  of media is red in T.rubrum
  • lactophenol cotton blue preparation is done to see macroconidia or microconidia or both 

GENUS                                INFECTION 

Trichophyton      -Predominantly microconidia
Microsporum       -Macroconidia
Epidermophyton  -Macroconidia

TREATMENT :

Antifungal agents ,oral griseofulvin 





AIM OF THIS POST :

Today as per the request of our very own stencilent family member we have posted to enlight about what mycosis is ,and we read in detail about dermatophyte :genus order,clinical types,lab diagnosis and finally about its treatment .Hope this post would have been informative if this post helped you, then do let me know in the comment section below as this would motivate me to post more such content .

CONTACT DETAILS :

Email :stencildent@gmail.com
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                           THANK YOU 
 


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