17. Tinea pedis: i. Name a fungus likely to cause tinea pedis in adults in Austr

Question

17. Tinea pedis:
i. Name a fungus likely to cause tinea pedis in adults in Australia.
ii. What are the symptoms of this disease?
iii. What feature is most diagnostic of this fungus?

18. Vaginal Thrush:
i. Name the fungus most likely to cause vaginal thrush in Australia.
ii. What are the symptoms of this disease?
iii. Describe a diagnostic test for this fungus.

19. Pityriasis versicolor
i. Name the fungus that causes pityriasis versicolor in Australia.
ii. What are the symptoms of this disease?
iii. Describe the diagnostic feature of this fungus in skin.

20. Aspergillosis
i. What are the diagnostic symptoms of aspergillosis? (1 mark)
ii. Name a site in the body where it is found. (1 mark)
iii. Is this disease superficial, cutaneous, subcutaneous or systemic? (1 mark)
iv. What are the diagnostic features of this organism after culture?

Explanation / Answer

1. 17. Tinea pedis:
i. Name a fungus likely to cause tinea pedis in adults in Australia.

Ans.Dermatophyte fungus of genera Trichophyton, Epidermophyton, and Microsporum can cause this disease.

ii. What are the symptoms of this disease?

Ans. Itching, burning, blisters, soring, stinging in between the toes are the major and most common symptoms of the tenia pedis.
iii. What feature is most diagnostic of this fungus?

skin lesion potassium hydroxide (KOH) test is the main diagnostic feature of this disease in which the affected normal cells dies off and the fungal cells retain that can be observed and confirmed under miocroscope.

2. Vaginal Thrush:
i. Name the fungus most likely to cause vaginal thrush in Australia.

Candida albicans is the main yeast or fungus which causes the vaginal thrush.

ii. What are the symptoms of this disease?

Ans. itching or burning sensation in sexual organ

Abnormally thick, pale white smelly discharge. Redness in vulva and burning sensation during urination.
iii. Describe a diagnostic test for this fungus.

Swab from the vaginal artea is examined under microscope, an enhanced no. of candida cells will be observed showing positive test for vaginal thrush.

Pityriasis versicolor
i. Name the fungus that causes pityriasis versicolor in Australia.

Ans. Malassezia is the causal fungus(yeast) for this disease

ii. What are the symptoms of this disease?

Ans Small scaly and discolored patches on skin, that becomes larger with time.Sometimes they may be itchy.
iii. Describe the diagnostic feature of this fungus in skin.

Ans. The diagnosis involves the KOH treatment followed by microscopy to observe fungal cee. But sometimes wood lamp test is used, in which the patch was exposed to UV light for 4 to 5 minutes and if the yeast is present the patch will turn yellow or green.

20. Aspergillosis
i. What are the diagnostic symptoms of aspergillosis? (1 mark)

THe diagnostic symptoms are fever with chilling, Bloody sputum, shortness of breathe, nosebleeding, swelled one sided face, headache etc.
ii. Name a site in the body where it is found. (1 mark)

They can be found at lungs in the body causing lung aspergillosis.
iii. Is this disease superficial, cutaneous, subcutaneous or systemic? (1 mark)

They could be any uperficial, cutaneous, subcutaneous or systemic in the form of mycosis.

iv. What are the diagnostic features of this organism after culture?

This organism produce several acids and enzymes sorrounding the culture which can be detected by litnus test and enzyne specific test like congo red test, lipase test by halo formation around culture in petriplate etc.

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