Skin infections and infestations Flashcards

(103 cards)

1
Q

which bacteria causes toxic shock syndrome in women using tampons

A

staph aureus

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2
Q

how does a staph aureus skin infection present

A

rash
peeling skin
impetigo (blistering skin infection, yellow crusting)
staphylococcal scalded skin syndrome (SSSS)
vomiting
diarrhoea

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3
Q

how can staph aureus infect the skin

A

via hair follicles = folliculitis

entering broken skin in eczema

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4
Q

how does staphylococcal scalded skin syndrome (SSSS) occur

A

toxin produced by staph aureus

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5
Q

where does staphylococcal scalded skin syndrome (SSSS) occur

A

face, axilla, groin

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6
Q

what investigations would you do if a skin infection is suspected (any skin infection)

A

blood cultures

swab lesion if broken

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7
Q

which infecting organism (and condition) is associated with yellow/honey/gold crusting

A

staph aureus causing impetigo

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8
Q

how is a staph aureus skin infection treated

A

flucloxacillin (topical or PO)

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9
Q

what is a complication of a staph aureus skin infection

A

toxic shock syndrome (TSS think tampons!) - causes organ failure

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10
Q

how does a strep pyogenes (group A strep) skin infection present

A

impetigo
cellulitis
necrotising fasciitis
red blistering skin

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11
Q

how does necrotising fasciitis present

A

small rash but patient is in excruciating pain
crepitations on xray
feels like bubble wrap

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12
Q

how is a strep pyogenes (group A strep) skin infection treated

A

penicillin or flucloxacillin

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13
Q

what is a complication of a strep pyogenes (group A strep) infection

A

toxic shock LIKE syndrome (TSLS) - causes organ failure

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14
Q

what type of infection is ringworm

A

fungal

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15
Q

what is another name for ringworm

A

tinea

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16
Q

how is ringworm transmitted

A

usually human to human contact

enters ‘soggy’ skin

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17
Q

why is it called ‘ringworm’

A

lesion grows outwards = ring appearance

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18
Q

where is tinea capitis

A

scalp

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19
Q

where is tinea barbae

A

beard

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20
Q

where is tinea corporis

A

body

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21
Q

where is tinea munuum

A

hand

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22
Q

where is tinea unguium

A

nail

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23
Q

where is tinea pedia

A

foot aka athletes foot

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24
Q

where is tinea cruris

A

groin

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25
what is the treatment of all ringworm (tinea) infections
clotrimazole cream
26
where does a candida skin infection present
in folds of skin eg under breast, groin, nappy area
27
treatment of candida skin infection
clotrimazole cream, fluconazole PO
28
which virus causes chicken pox
varicella zoster virus
29
which virus causes shingles
varicella zoster virus
30
which age group presents with chicken pox
children
31
how does chicken pox present
generalised fever and rash red macular spots itchy location - more dense on trunk
32
what is ophthalmic zoster
chicken pox when the trigeminal nerve is affected
33
what happens after a patient has experienced chicken pox after an exposure to varicella zoster virus
virus remains in nerve roots of spine as a latent virus (no symptoms as latent)
34
what is the treatment for chicken pox
no treatment, just prevention with live attenuated vaccination
35
what is a rare complication of chicken pox
ramsay hunt syndrome (aka optic herpes zoster) when pain in auditory canal, deafness
36
which age group does shingles present in
elderly (with childhood chicken pox)
37
how does shingles occur
varicella zoster virus reactivation
38
how does shingles present (+location)
dermatomal location (as the virus is only in one nerve root) neuropathic itch (damage to CNS) sharp pain rash - presents later than the pain/itch/tingling facial involvement = ophthalmic zoster (naso ciliary branch oftrigeminal nerve affected)
39
what is the treatment of shingles
acyclovir
40
what is recurrent shingles a sign of
immunocompromised, check for HIV
41
how can shingles be prevented
live attenuated vaccine for >70s that haven't had shingles yet
42
what age group does herpes simplex virus (type 1) affect (primary infection)
pre school aged children
43
how does herpes simplex virus (type 1) present
symptomless mouth ulcers erythema multiforme (target lesions)
44
can herpes simplex virus spread
yes it can spread to other parts of body, healthcare professionals (eg dentists)
45
how is herpes simplex virus (type 1) treated
acyclovir
46
what age group does molluscum contagiosum affect
children and adults
47
how is molluscum contagiosum transmitted
sexually | mother to child
48
how does a molluscum contagiosum infection present (3)
fleshy firm umbilicated papules look fluid filled but are solid 1-2mm (small)
49
treatment of molluscum contagiosum
self limiting - takes <2 years | liquid nitrogen
50
what virus causes warts
HPV (human papilloma virus)
51
which age group are warts common in
children
52
what are warts on the feet called (plantar warts)
verrucas
53
treatment of warts/verrucas (2)
self limiting FIRST LINE - topical salicylic acid OTC SECOND LINE - liquid nitrogen (cryotherapy)
54
what is the presentation of a human papilloma virus (HPV) infection
warts - including verrucas, genital warts cervical cancer head and neck cancer
55
how can human papilloma virus infection be avoided
HPV vaccination in adolescence
56
what age group does herpangina affect
preschool children
57
what viruses cause herpangina
coxsackie virus
58
``` how does herpangina present (2) associated symptoms (1) ```
back of mouth/soft palate = loss of appetite | blistering rash
59
complicartions of herpangina
hand foot and mouth disease
60
treatment of herpangina
self limiting
61
what is another name for erythema infectiosum
slap cheek disease
62
what is the cause of erythema infectiosum
parvovirus B19
63
how does erythema infectiosum present (+location)
raised red rash location - face an proximal limbs
64
complications of erythema infectiosum (in adults) (2)
spontaneous abortion | chronic anaemia
65
which group of patients does orf present in
farmers of sheep
66
presentation of orf
fleshy nodule on hands
67
treatment of orf
self limiting
68
how is syphilis transmitted
sexually
69
how does syphilis present
primary infection - painless ulcer at site of entrance (oral or genital) OR secondary infection all over body (hands and feet), 'snail tract' ulcers in mucous membrane
70
diagnosis of syphilis
blood tests
71
treatment of syphilis
IV penicillin
72
which skin infection presents with a large asymmetrical lesions with demarcated edges and a light centre
tuberculoid leprosy
73
what is another name for tuberculoid leprosy
hansens disease
74
what causes tuberculoid leprosy
mycobacterium
75
what is the cause of lyme disease
bacterial infection transmitted by ticks
76
how does lyme disease present
'target/bullsesye lesion' at site of bite aka 'erythema migrans'
77
complications of lyme disease
heart block | nerve palsy
78
diagnosis of lyme disease
blood test for antibody
79
treatment of lyme disease
doxycycline | amoxicillin 2nd line
80
how is zika virus transmitted (2)
mosquito | sexually
81
what is a complication of zika virus
guillain barre syndrome
82
what is pediculus capitus
headlouse
83
what is pediculus corporis
body louse
84
what is phthirus pubis
pubic louse
85
how are lice treated
malathion lotion
86
how does lice present
intense itch
87
how does scabies present (+location)
intense itch rash in lines location - gential, finger webs, back, wrist
88
treatment of scabies
malathion lotion | benzyl benzoate
89
what are Norwegian scabies
scabies with chronic crusting
90
why might PPE be needed in treating scabies
if it is Norwegian scabies
91
how does hand foot and mouth disease present
blistering in soles of feet, palms of hands and in the mouth
92
how is erythema infectiosum (slap cheek disease) treated
self limiting
93
what is the cause of scarlet fever
strep infection
94
how does scarlet fever present (3)
red rash - on trunk, cheeks, limbs white coating on tongue 'strawberry' tongue - red and swollen
95
how is scarlet fever treated
penicillin
96
what do plantar warts (verrucas) look like
squashed warts, like a cauliflower
97
what happens when latent herpes simplex virus 1 reactivates
coldsores
98
what can reactivate herpes simplex virus type 1 (2)
hormones - stress, menstruation
99
what can happen in the brain in someone with latent herpes simplex virus type 1
temporal lobe necrosis (herpes simplex encephalitis)
100
which bacteria can cause gas to form in the tissues it infects what is this condition called
group A strep (strep pyogenes) necrotising fasciitis
101
treatment of necrotising fasciitis
surgical debridement | antibiotics - penicillin
102
which branch of which division of which nerve is affected in shingles when there is facial involvement
nasociliary branch of ophthalmic division of facial nerve
103
which cytotoxin does MRSA produce in necrotising fasciitis
panton valentine leucocidin (PVL)