8 - Derm - Bacterial infections - Common pathogenic organisms 1

Question 1

name 6 bacteria that are pathogenic dermatologically

Answer 1

staph aureus
strep pyogenes
pseudomonas
corynebacterium
spirochaetes
mycobacterium

Question 2

Staph aureus - carriage is only important when..? how to detect?

Answer 2

only important if invasion of epidermis, hair follicle or toxin production
skin swabs readily detect

Question 3

staph aureus mgmt - 3 ways

Answer 3

topical - mupirocin, fusidic acid
oral - flucloxacillin, erythromycin
iv - flucox

Question 4

strep pyogenes - also known as? how to detect?

Answer 4

GAS

ASO titre - takes a few days , or skin swabs readily detect

Question 5

strep pyogenes/GAS - antigens may cause…? 6 things

Answer 5

erythema nodosum, erythema multiforme, vasculitis, glomerulonephritis, rheumatic fever, guttate psoriasis

Question 6

strep pyogenes/GAS - mgmt

Answer 6

topical not recommended
oral - amox, penicillin, erythro if allergic
iv - benzylpenicillin

Question 7

pseudomonas - colonises where? infection can cause..? only considered pathogenic if..?

Answer 7

colonises moist areas
can cause green skin
only if broken skin

Question 8

pseudomonas - possible disease (3)

Answer 8

infection of wounds, leg ulcers
paronychia +/- toe web space infection
gram -ve folliculitis (jacuzzi dermatitis)

Question 9

pseudomonas mgmt

Answer 9

top - –flamazin (silver based AB), acetic acid

oral - ciprofloxacin