Viral Infections Flashcards
I.C of HSV type 1
2-5 days
1ry attack of HSV1 accompained with:
Dissmented with Fever, malaise & local lymphadenopathy with no tendency to grouping.
Herpatic whittlow is :
Fingers affection as in dentists and thumb suckling children with oral herps
Grouped vesicles on erythmatous base. DD
Recurrent attack of HSV1
Herpez zoster
DD of Recurrent HSV1
Impetigo (honey colored crust)
Herpes zoster
A commen PF to recurrent HSV1
Sun exposure
In pregnancy, a dangrous to fetus occur with which attack of Herpes progenitalis
Primary attack, indicating cesarean sections
TTT of HSV1&2
Topical :
- Gentian violet 2% paint or k permanganate 1/8000
- Acyclovir cream 5 tim/d for 7days
Systemic : 200×5×7
Acyclovir 200mg 5 tim/d for 7-10 days or fam or valacyclovir
1ry infection with varicella zoster is :
Chicken pox
1ry infection with varicella zoster is :
Chicken pox
I.C of chicken pox
2-3 wk
In chicken pox, pt is infectious :
4 days before eruption until lesions crusted
The eruption in chicken pox is :
Itchy
Polymorphic
Centripetal (affect mainly trunk, face scalp & neck)
M.M affection as Eye, mouth & gingival
Hearing in recurrent HSV1
Within 5-7 days with normal skin
Healing in chicken pox :
Within 10 days without squelae
Prodromal stage of chicken pox :
1-2 days showing fever, malaise & headache
DD of chicken pox
Papular urticaria
Scabies
TTT of Chicken pox
- Prophylactic : live attenuated vaccine or hyperimmune globulins
- Topical : gentian violet, calamine lotion
- systemic : 800×5×5
antihistamines, Acyclovir in
Child 20 upto 800 mg 4 tim/d for 5 days
Adult 800 mg 5 tim/d for 5 days
Herpes zoster caused by
Reactivation of latent VZV in dorsal root gang. or cranial nerve gang. In dermatomal distribution strictly unilateral
Healing of Herpes zoster
Vesicle dry within 1-2 wk leaving crusts then scarring
Trigiminal affection in Herpes zoster
Herpes zoster opthalmicus
Geniculate ganglion affection in Herpes Zoster
Ramsay hunt syndrome
The Most commonly complication of Herpes Zoster
Post-herpatic neuralgia
TTT of Herpes Zoster
- Systemic (main line) 800×5×7
Acyclovir 800 mg 5 tim/d for 7-10 days, fam or vala..
-Painkillers - Topical as HSV
I.C of verruca vulgaris
1-8 months
Leison of ordinary warts
Asymptomatic geisha papuled with verrucous rough surface
Leisen of plane wart and its site
Multiple skin colored small papules with flat smooth surface
Affect usaually face of children
DD of planter wart
Callus : hyperkerarotic crossed by skin creases (in p.w no creases)
DD of condyloma accuminta
Condyloma lata of syphilis
Cervical intraepithelial neoplasm is a complication of
Genital warts (condyloma accuminta)
TTT of Warts
- chemical cautery
Salicilc acid 40% in plantar warts
Trichloro acetic acid (TCA) safe in pregnancy - Electric cautry
- Crytherapy with liquid nitrogen (-196 )
- Later
- Topical keratolytic as retenoic acidosis in plane warts
- 25% podophyllin in genital warts (C.I in pregnancy)
I.C of molluscum contagiusm
6-9 months
Primary leison of molluscum contagiosum
Solitary, painless, shiny, pearly, whiete papule & centrally umblicated
Sites of molluscum contagiosum
Face, genitalia & trunk
TTT of molluscum contagiosum
- Mechnical by expressing content of papule then cauterizing base
- Concentrated phenol paint
- Same as warts
Complications of HSV
Erythema multiforme
Exzema herpeticum
Corneal ulcers
Impetigo
1ry site attacked by HZV
Epidermal keratinocytes
