Types of skin infections include bacterial, viral, fungal, and parasitic. Common causes are Staphylococcus, Streptococcus, Pseudomonas, fungi such as Microsporum and Trichophyton, and viruses like herpes simplex. Skin infections enter through breaks in the skin, hair follicles, mucous membranes, and can be transmitted via direct contact or fomites. Symptoms vary depending on the infecting pathogen but may include rashes, lesions, or pustules. Treatment involves antiviral medications for viruses, antifungals for fungi, and antibiotics for bacteria.

2.  What is skin infection?
 Bacterial skin disease
 Viral skin diseases
 Fungal skin diseases
 Parasitic skin disease
 Summary

4.  Staphylococcus , Streptococcus and
Pseudomonas are main causitive agent of
skin infections.
 They enter in skin by hair follicle, surgical
incisions, skin abrasions, Mucous
membrane ,Ear, Sebum channels.
 Transmitted by direct contact, endogenous
infection, Swimming water , hot tubes etc.

5.  Impetigo –Staphylococcus aureus or Streptococcus
pyogenes.
 Folliculitis-Staphylococcus aureus
 Toxic shock syndrome-Staphylococcus aureus
 Necrotizing fasciitis- Streptococcus pyogenes
 Erysipelas-Streptococcus pyogenes
 Dermatitis-Pseudomonas aeruginosa
 Otitis externa-Pseudomonas aeruginosa
 Acne-Propionibacterium acnes

8.  Fever , rash, shock
 Tissue destruction
 Reddish patches
 Inflammatory lesions
 Infection of hair follicle
 Vesicles on skin

9.  For pseudomonas -
fluoroquinolones, and
self limiting
 For propionibacterium -
benzyol peroxide, isotr -
etinoin, azelaic
• For Staphylococcus aureus- penicillin, beta-lactom
antibiotic
• For streptococcus -penicillin ,surgical remove of
tissue

10.  Caused by Papillomavirus, smallpox, monkey
virus, Varicella zoster virus, Herpes simple virus
type 1,6 and 7, Measles virus, Rubella virus,
Human parvovirus.
 Enters in skin by respiratory track, endogenous
infection of peripheral nerves, mucous membranes
etc.
 Transmitted by contact, aerosol, recurrence of
latent chickenpox , recurring latent infection etc.

13.  Warts
 Smallpox
 Monkeypox
 Chickenpox
 Shingles
 Herpes simplex
 Measles
 Rubella
 Fifth disease (erythema infectiosum)
 Roseola

14.  Horny projection of the skin formed by proliferation
of cell
 Pustules that may be nearly confluent on skin
 Vesicles are confined to face, throat and lower back,
waist, scalp, upper chest ,around mouth.
 skin rashes of reddish maculae's first appearing on
the face and spreading to trunk and extremities
 Mild macular disease with facial rash

15.  Removed by liquid nitrogen cryotherpay,
electrodessication , acids or lasers.
 Acyclovir , preexposure to vaccine etc.

16.  Caused by Microsporum, Trichophyton,
epidermophyton spp, Sporothrix and
Schenckii , Candida albicans .
 Enters in by skin ,skin abrasion, mucous
membranes etc.
 Transmitted by direct contact ,soil
,endogenous infection etc.

17.  Ringworm
 Sporotrichosis
 Candidacies

18.  Skin lesions of highly varied apperaance,
loss of hair.
 Ulcer at site of infection spreading into
neraby lymphatic vessels
 Infected skin becomes bright red

19.  Griseofulvin , Miconazole, Clotrimazol
 Potassium iodide , Ketoconazole

20.  Caused by Sarcoptes scabiei and Pediculus
humanus capitis etc.
 Present on skin
 Transmitted by contact

21.  Scabies and Pediculosis
 Forms papules and itching
 Treated by Gamma benzene hexachloride ,
permethrin and by topical insecticide
preparation.

22.  Types of skin infections are Bacterial, Fungal, Viral
and parasitic.
 Disease transmitted by direct contact, soil, infection
, aerosols etc.
 Portal of enrty is skin ,hair folicles, surgical incision,
ear ,sebum channel, repiratory track, endogenoous
infection, mucous membrane etc.
 Symptoms are different for different infection.
 Treatment for virus , bacteria ,fungi and parasitic is
different.

23.  MICROBIOLOGY AN INTRODUCTION BY
TORTORA
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