8 - Derm - Bacterial infections - Common pathogenic organisms 2

Question 1

Corynebacterium - causes what? mgmt?

Answer 1

causes erythrasma

oral erythromycin

Question 2

corynebacterium - erythrasma - appearance? -Ix?

Answer 2

orange brown flexural rash

coral pink fluorescence under Woods UV light

Question 3

Spirochaetes - 2 diseases

Answer 3

treponema palladium (syphillis)
lyme disease (borrelia)

Question 4

treponema palladium (syphillis) - primary and secondary and mgmt

Answer 4

prim - painless genital chancre (ulcer)
sec - painless erythematous maculo-papular rash
mgmt - oral benzylpenicillin

Question 5

Lyme disease (borrelia) - spread by? appearance?

Answer 5

by tick bites

annular erythematous rash - migrates out over time - erythema migrans

Question 6

lyme disease - complications 3

-mgmt

Answer 6

• comp - neuro disease, myocarditis/pericarditis, arthritis

- mgmt - oral doxycycline

Question 7

mycobacterium - 4 diseases

Answer 7

cutaneous TB (lupus vulgaris)
tuberculoid leprosy
lepromatous leprosy
mycobacterium marinum

Question 8

cut TB (lupus vulgaris) appearance

tuberculoid leprosy appearance

Answer 8

well-demarcated red brown plaque, apple jelly nodules

hypopigmented skin patch with loss of skin sensation

Question 9

lepramatous leprosy - appearance

Answer 9

‘leonine facies’ - thick skin, granulamatous lesions, collapsed nasal septum

Question 10

mycobacterium marinum - disease course

Answer 10

nodule on hand > lymphatic spread > multiple ascending nodules

Question 11

mycobacterium marinum - colloquial name and mgmt

Answer 11

fish tank granuloma

doxycycline