referred from clinical dermatology (Lange medical book 1st edition ) and Harrison internal medicine), Wikipedia

1. BACTERIAL SKIN
INFECTION
SUBMITTED BY-RUPAM CHATURVEDI
GROUP –E1
ROLL NO -14

2. Bacterial skin infection

4. Bacterial skin infection
• Most common bacterial skin infections
are caused by coagulase-positive
Staphylococcus aureus or group A
beta hemolytic streptococci.
• Syphilis has been called “the great
masquerader” and “the great imitator”
based on the many varied
presentations of the cutaneous and
other organ system findings.

6. IMPETIGO
Bullous
•New born (staphylococcal
toxin no host response )
Non -
bullous
•Children +adult(host
response )

7. Clinical feature
Bullous
• begins as a superficial vesicle
• Rapidly progresses to a flaccid bulla,
with sharp margins and no
surrounding erythema.
• the bulla ruptures,a moist yellow
crust forms.
• arises on grossly normal skin and
favors moist intertriginous areas,
• Complication :SSSS
Non –bullous
• begins as a single lesion
• manifesting as a red macule or
papule that becomes a vesicle
• The vesicle ruptures, forming an
erosion
• honey-colored crust commonly seen
with impetigo
• occurs on the face or extremities
• Complication :PSGN

8. Management
• simple incision with a number 11 scalpel blade and drainage with
evacuation of the pus.
• oral antibiotics
• for MSSA infections include dicloxacillin, cephalexin,clindamycin,
doxycycline, minocycline, and trimethoprim sulfamethoxazole.
carriers of MSSA and MRSA should be
• treated with intranasal mupirocin (Bactroban) ointment twice a
day for 5 days and 4% chlorhexidine (Hibiclens) wash daily.

9. Erysipelas
• infection of the dermis
and subcutaneous tissue
• poorly demarcated
borders
• caused by Streptococcus
or Staphylococcus species
• Associated with
lymphangitis .
cellulitis
• superficial form of
cellulitis
• sharply demarcated
borders
• caused almost exclusively
by Streptococcus.
• Associated with
lymphangitis less
common .

11. erysipalus
Necrotizing faciitis Periorbital cellulitis
Ecthyma gangrenosum Gas gangrene

12. carbuncle
• Carbuncles are an
aggregate of infected
hair follicles that form
broad, swollen,
erythematous, deep,
and painful masses
that usually open and
drain through
multiple tracts.
furuncle
• a furuncle is a tender,
erythematous, firm or
fluctuant mass of
walled-off purulent
material, arising from
the hair follicle.

13. Sychosis vulgaris
• It’s a cutaneous condition characterized by a chronic
infection of the chin or bearded region.
• The irritation is caused by a deep infection of hair
follicles.
• species of Staphylococcus or Propionibacterium bacteria.
• Asymptomatic or painful and tender
erythematouspapules and pustules may form around
coarse hair in the beard

14. • Sycosis vulgaris is a cutaneous condition characterized by a chronic
infection of the chin or bearded region. The irritation is caused by a deep
infection of hair follicles, often by species of Staphylococcus or
Propionibacterium bacteria. Asymptomatic or painful and tender
erythematouspapules and pustules may form around coarse hair in the
beard

15. Pseudo folliculitis

16. syphilis
• Syphilis is a sexually transmitted disease with worldwide
distribution.
• caused by Treponema pallidum , a spirochetal bacterium.
• After inoculation through skin or mucous membranes, the
bacterium spreads throughout the body via the lymphatic
system and blood.

17. Primary
• At the site of entry .
• 10-90 days after
infection.
• dusky red macule
evolves into a papule.
Surface necrosis occurs
with
• indurated, firm ulcer
(chancre), with a raised
border.
• Ulcer spontaneously
heals 2-10 weeks .
Secondary
• Systemic symptoms
• 4to 10 weeks after onset
of infection.
• pink, violaceous or red-
brown macular, r or
papulosquamous
eruption appears on the
face, trunk, extremities.
• A patchy, “moth-eaten”
and/or diffuse alopecia
may develop
• Wart-like moist papules
condylomata lata appear.
• Heal within 3-12 wk
tertiary
• primarily affects the
central nervous system
and the cardiovascular
system.
• Small group of people.