erythrasma - gmch
TRANSCRIPT
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Diseases due to Coryneform bacteria
Erythrasma
C.minutissimum
Gram’s positive rod
Normal flora
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Erythrasma
Sites
Genitocrural
Axillae
Submammary regions
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Clinically
Reddish brown lesions
Asymptomatic
Well defined borders
Smooth surface -fine scaling
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Diagnosis
Wood’s lamp exam
Coral red
(coproporphyrin III)
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Pitted Keratolysis
Micrococcus sedentarius
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Treatment of Coryneform Infections
Topical fusidic acid
Benzoyl peroxide,
Imidazoles
Systemic erythromycin
Tetracycline
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Intertrigo
Inflammation of opposing surfaces
Infections
Erythrasma
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Intertrigo
Infections
Group A streptococcus
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Intertrigo
Infections
C. albicans
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Intertrigo
Infections
P aeruginosa
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Treatment
Moist dressings/or Castellani’s paint
Topical antibacterial/antifungal creams
Zinc oxide topically to avoid friction
Weight reduction
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Staphylococcal Scalded Skin
Syndrome
(Ritter’s Disease)
Etiology
Staph.
Strept.group A
Exotoxin A&B
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Pathogenesis-
Exotoxin carried
hematogenously
Intraepidermal
acantholysis
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Clinically-
Erythema,exfoliation/
denudation of skin
Wet tissue paper
appearance
Nikolsky sign positive
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Toxic Shock Syndrome
Etiology
Staph. aureus
TSS toxin 1
Rarely Strept. GroupA
Clinically-
Fever, Hypotension,
Gen. rash. ,Multisystem failure
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Scarlet Fever
Acute infection of tonsil,
skin & other sites
Erythrogenic exotoxin
Group A Streptococcus
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Scarlet Fever
Scarlatiniform Rash
(Pastia’s lines)
Scattered petechiae
Strawberry tongue
Enanthem
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Infective Endocarditis
Microbial infection of valves,
mural endocardium
Bacteremia
Etiology
Staph.,Strept.pneumoniae
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Predisposing factors-
Underlying heart disease
I/V drug users
Prosthetic valves
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Infective Endocarditis
Subconjunctival hemorrhage
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Infective Endocarditis
Dermal nodule with hemorrhage
& necrosis
Bacteremia(Staph.)
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Acute meningococcemia Early lesions
2-10mmMacules
/papules
Later lesions
Petechiae,
Ecchymosis
Purpura fulminans
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Treatment
Reduce no of indwelling catheters, source of
infection
Penicillin G -3lac unitsI/v/kg/d
Ceftriaxone
Cefotaxime
Ampicillin I/VX10 days
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Pseudomonas infections Nail infections
Web space infections
Folliculitis
Primary/secondary pyodermas
Ecthyma gangrenosum
Bactremia
Endocarditis
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Treatment
Control of offending factors
Appropriate antibiotics
Debridement of infarcted area
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Actinomycosis
Chronic suppurative granulomatous disease
Actinomyces israelii
Endogenous infection
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Uncommon
Exposed skin
Subcutaneous nodules
Sinuses
Regional lymphadenopathy
Primary Cutaneous
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Actinomycosis
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Treatment I/V penicillin 10-12 million units daily
x 30-45 days Wide surgical excision
I/M Penicillin 2-5 million units x 12-18 months
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Nocardiosis Acute - Chronic suppurative disease
Aerobic Actinomycetes
Opportunist pathogen
Primary infection by inhalation
- pulmonary
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Cutaneous Lesions Primary chancriform
Multiple abscesses
Muscles & bones
Lymphangitic – multiple
suppurative nodules
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Treatment
Cotrimoxazole
Sulphonamides
Ampicillin
Minocycline
Amikacin
Imipenem