MSS micro quiz

The member of the normal flora considered responsible for tinea versicolor is .

Staphylococci.

Diptheroids.

Candida spp

Malassezia spp.

A massive lesion with multiple draining sinuses caused by the spread of Staphylococcus aureus infection (often on the neck and upper back) is called:

Furuncle(boil)

Abscess

Carbuncle

Pustule

Which of the following is not the characteristics of impetigo?

Which of the following is true about impetigo

The condition does not resolve spontaneously without treatment

Exfoliative toxins target desmogleins type 3

Staph aureus is the most common cause of bullous impetigo followed by strep pyogenes

Diagnosis is made based on skin clinical findings and history

Non-bullous Impetigo is painful

An 18-year-old man presents with a painful rash on his upper arm. He reports a recent mosquito bite in the same area three weeks ago. Since then, the upper third of his arm has become red, painful, and hot. On physical exam, his physician notes a well-demarcated raised area that is bright pink and hot to the touch. Which of the following is a possible casue

Which of the following is wrong about deep skin infections(more than one answer may be chosen)

Erysipelas and cellulitis can be difficult to distinguish in some cases

Erysipelas and cellulitis management is different

An alternative for penicillin allergic cellulitis patient is aminoglycoside

Wound cultures and blood cultures are performed to guide antibiotic choice but are not essential for cellulitis diagnosis

Risk factors such as immunosuppresion and skin trauma/damage are present in most of cases

Strep pyogenes is the most common cause followed by staph aureus

Rheumatic fever, followed by glomerulonephritis, are complication of strep pyogenes skin infections

Which of the following is wrong about hair follicle infections(more than one option may be chosen)

Furuncles(boils) are painless whereas carbuncles are painful

Folliculitis heals with scar

Pseudomonas are only involved in hot tub folliculitis

In some cases, carbuncles may be treated with antibiotics alone

Furuncle(boils) involve all of hair follicle and is treated by incision and drainage

Staph aureus is main causative agent in all hair follicle infections

Furuncle(boil) has multiple draining sinuses

Which of the following about necrotizing fasciitis is wrong(more than one option may be chosen)

Viruses may be causes

Plain x-rays are very useful in identifying it

Imaging studies like CT, MRI, and ultrasound shouldn't delay treatment in highly suspected cases

Pain out of proportion to physical findings is a very helpful symptom

Antibiotics are the mainstay of treatment, surgical debridement may not be necessary in some cases

Hyperbaric oxygen hasn't been shown to reduce mortality in conjuction with surgery and antibiotics

Which of the following is true ?(more than one option may be chosen)

Clostridial myonecrosis is the most common cause of necrotizing fasciitis

Fourniers gangrene affects perineal area

Most cases of necrotizing fasciitis is polymicrobial(type 1)

Multidisciplinary team has to be involved in treatment of necrotizing fasciitis

Type 4 necrotizing fasciitis is causes by marine vibrio organisms

Mortality rate of necrotizing fasciitis has become very low in modern times due to treatment

One of the routine microscopic laboratory identification methods of the fungal specimens is done by using..

Direct light microscopy

Immunoflouresence

Giemsa stain

KOH mount

All of the following are true regarding Tinea capitis EXCEPT

It is caused by a type of fungi called dermatophytes.

T leads to bald, scaling patches in the scalp.

It is commonly referred to as 'ringworm of the scalp.'

It is treatable with oral antifunals and azoles whereas topical antifungals won't be effective

It is caused by a worm burrowing into the skin.

Your patient is a sportsman who plays racket ball at a local club, softball, and hockey in the winter. The patient presents with a pruritic, erythematous, moist, rash on his groin. The infected area is the skin on the upper thigh and especially folds on the lower abdomen; both the scrotum and penis are spared. What is the most likely causative agent of this patient’s condition?

Trichophyton rubrum

Hortae wernickea

Malassezia furfur

Sporothrix schenkii

Which of the following is wrong about fungal skin infections(more than one answer may be chosen)

Pityriasis versicolor lesions are characterized by hypo-hyper pigmentations but may have some scaling and induration

Soft and loose white piedra is caused by piedra hortae

Sporotrichosis is characterized by painful ulcers along lymphatic vessels and can be caused by many fungal species

Mycetoma has multiple draining sinuses and many fungal species may cause it

Chromoblastomycosis does not involve lymphatics and develops scaly wart like lesions through inoculation of a specific single fungal species

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