Pediculosis pubis

Question 1

In infestation of hair-bearing regions by the crab or pubic lice.
■ Most commonly inhabit the pubic area; hairy parts o the chest and axillae; upper eyelashes.
■ Mani ested clinically by mild-to-moderate pruritus, papular urticaria, and excoriations.

Answer 1

Pediculosis pubis

Question 2

Etiology. 
prasite
size 
life span 
eggs born

Answer 2

Phthirius pubis, the crab or pubic louse. Size 0.8 to 1.2 mm. First pair of legs vestigial; other two clawed. Life span 14 days. Female lays 25ova.Nits incubate or 7days;nymphs mature over 14 days. Mobility: Adults can crawl 10 cm/day. Prefer a humid environment; tend not to wander. Infestation most common in young males. transmission during close physical contact: Sharing bed. May coexist with other sexually transmitted diseases.

Question 3

manif

Answer 3

OFTEN ASYMPTOMATIC Mild-to-moderate pruri- tus or months. With excoriation and second- ary in ection, lesions may become tender and beassociatedwithenlargedregional. INFESTATION Lice appear as 1- to 2-mm, brownish-gray specks (Figs. 28-12 and 28-13) in hairy areas involved. Remain stationary or days; mouth parts embedded in skin; claws grasping a hair on either side. Usually ew in number. Nits attached to hair appear as tiny white-gray specks

Question 4

Skin lesions

Answer 4

Papular urticaria (small ery- thematous papules) at sites o eeding, especially periumbilical (Fig. 28-14). Changes secondary torubbinglicheni cationandexcoriations. Secondary S. aureus in ection. Maculae coeruleae