PAPOVAVIRUS Flashcards
char aa
Nakes dsdna viruses char as slow growinh.
replicate in nucleaus.
no envelope
resistant to deying freezing and solvents.
Warts(verruca)
L1- codes for major capsid protein and self assembles into virus like particles (VLPs)
L2- minor capsid protein. L2 protein help expose the keratinocyte bindingh detweminant of L1 protein allowing hpv to bind onto the basal keratinocyte and taken into the cell.
Warts(verruca)
cause vast majority of cutaneous non genital warts
HPV 1,2,27, and 57.
Warts(verruca) plantar warts in children younger than 12 yo.
HPV 1
Warts(verruca)
Hand
HPV2
Warts(verruca)
plantar warts >21 yo.
HPV 27,57
Warts(verruca)
external genitalia warts
HPV 6,11
Warts(verruca)
anogenital dysplasia
hpv 16/18
Warts(verruca)
WHIM Syndrome
Warts hypogammaglobulinemia infection and myelokathexis: gain of function mutation of CXCR4.
deficiency of GATA2
present w
Extensive warts.
GAT2 deficiency sundrome
WILD syndrome.
defIcient CD4, Hyper IGE ,caused by DOCK8 deficiency are 2 other Tbcell immunodef states assoc w
HPV infection
VERRUCA VULGARIS
HPV types that cause common warts
HPV 1, 2, 4 ,27, 57, 63
VERRUCA VULGARIS
common warts occur most commonly between ages
age 5-20 yo.
and only 15% occur after age 35yo.
warts in butches are caused by
HPV2 and 4.
27% or hand warts from butchers are caused by
HPV7.
HPV… Has been reported to cause dystrophy of all fingernails w marked subungal hyperkeratosis and destruction of nail plate without periungal involvement.
HPV57
HPV with higher risk of SCC
HPV 16 and 18
clearance rates of common warts.
Spontaneous resolution.
children are 23% at 2 mos. 30% at 3 mos 50% at 1 year. 65-78% at 2 years. 90% over 5 years.
PIGMENTED WARTS
skin types
Skin type 3 to 6
Pigmented warts Caused by HPV types
HPV 4, 60, 65.
Pigmented warts
pogmentation is caused by
melanocytes in the basal layer of HPV infectee tissue that contain large amounts of melanin.
FLAT WARTS (Verruca Plana) caused by hpv type
HPV 3, 10, 28, 41.
FLAT WARTS (Verruca Plana) present as
2-4mm flat topped ppules tht are slightly erythematous or brown on pale skin and hyperpigmented ok darker skin.
occur kost commonly on sun exposed surfaces likely due to immunosuppression.
face and extremities are most common. spec forehead cheeks nose and area around mouth and backs of the hands. but can occur anywhere.