Skin, Eye, and Ear

Top layer of skin

epidermis

conjunctivitis

infection of the conjuctival membrane

viral conjunctivitis

most common, caused by adenovirus

normal skin flora

bacillus sp, coag neg staph, diphtheroids, lactobacillus, microaerophilic, propionibacterium, alpha strep other than enterococcus

viral keratitis

mostly caused by herpes simplex

keratitis

infection of the ocrea, most often caused by pseudomonas aeruginosa and staph aureus

bacterial conjunctivitis

commonly caused by chlamydia trachomatis, strep pneumo, staph aureus, haemophilus influenzae, and neisseria gonorrhoea

mid layer of skin

dermis

inner layer

subcutaneous

Staph, corynebacterium, yeasts

Normal flora of the skin

yeast

What is this

corynebacterium

what is this

Cutibacterium acnes

Acne

aerotolerant anaerobic gram positive rod

Acne gram reaction

exfoliatin

Staph aureus toxin for scalded skin syndrome

positive cocci
positive
positive
no
yes
Beta

Staph aureus gram reaction,
morphology,
catalase,
coagulase,
growth on MAC
CNA,
hemolysis pattern

staph aureus, strep pyogenes

Pyoderma bacteria

group A
neg
beta

strep pyogenes: is what group
catalase
hemolysis

puss filled

what does purulent exudates mean

staph aureus and group A strep

Impetigo bitches

group A strep strep pyogenes

Erysipelas cause

cellulitis, bright red skin, fever

Erysipelas symptoms

Erythrogenic or pyrogenic exotoxin

What does group A strep contain that causes scarlet fever

Group A strep- strep pyogenes

Necrotizing fasciitis and streptococcal toxic shock syndrome caused by

extensive tissue destruction, comes into body from open wounds

Necrotizing fasciitis

-tissue necrosis, shock, renal failure
-from wounds due to surgery or trauma
-causes a dangerous drop in BP, shock, damage in kidneys, liver and lungs
-the toxin makes it difficult to treat

Streptococcal toxic shock syndrome

mycobacterium spp

Acid fast bacilli

mycobacterium spp

Use acid fast staining for

mycobacterium leprae

Leprosy or Hansen's disease

transmitted by respiratory droplets
high ID50
long incubation period
loss of sensory perception in affected area

Mycobacterium leprae

Bacillus anthracis

Anthrax

gram positive rod, spore former
lesions, malignant pustule
contract from contact with animals-farmer, hunter

bacillus anthracis morphology

Human papillomavirus

Warts

variola virus

Smallpox

fevers, chills, myalgia, lesions in the epidermis
respiratory route

symptoms of smallpox

varicella-zoster virus human herpes virus 3
vesicular rash starts on the face
acquired via inhalation of virus

Chickenpox

reactivated chickenpox due to immunosuppression
pain followed by lesions

Shingles