A contagious parasitic infection caused by ectoparasitic blood-feeding insects (lice)
Two species of lice infest humans:
Pediculus humanus has two subspecies: the head louse (var. capi...
Pruritus is common, often worse at night.
Often associated with “outbreak” in school settings
Investigate contacts of infected individuals.
Diagnosis is confirmed by visuali...
Head lice: Clean items that have been in contact with the head of the infected individual within 48 hours.
Wash all bedding, towels, clothes, headgear, combs, brushes, and hai...
Cole SW, Lundquist LM. Spinosad for treatment of head lice infestation. Ann Pharmacother. 2011;45(7–8):954–959. [View Abstract on OvidMedline] ...
B85.0 Pediculosis due to Pediculus humanus capitis
B85.1 Pediculosis due to Pediculus humanus corporis
B85.3 Phthiriasis
B85.2 Pediculosis, unspecified
B85.4 Mixed pediculosis and phthiriasis
School-based no-nit policies are not necessary because empty nits may remain on hair shafts for months after successful eradication.
Improper product application is a common cause of tr...
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FIGURE 99.27. Mite that causes scabies (<italic>Sarcoptes scabiei</bold>).
Pthirius pubis, the crab louse. Etiologic agent Pediculosis pubis.
FIG. 6.13. Scabies typically involves the web spaces between the fingers and/or the toes.
FIG. 6.14. The rash of scabies may be more diffuse in infants, spreading to the trunk (A) and scalp (B) in addition to the extremities (C).
FIG. 6.14. The rash of scabies may be more diffuse in infants, spreading to the trunk (A) and scalp (B) in addition to the extremities (C)...
Scabies. A fertilized female mite is visible.
<bold>Figure 6-5</bold> Pediculosis capitis. Note the whitish nits found along the hair shafts. (Courtesy of Hans B. Kersten, MD.)
<bold>Figure 6-5</bold> Pediculosis capitis. Note the whitish nits found along the hair shafts. (Courtesy of Hans B. Kersten, ...
Bug bites: abdomen, "breakfast, lunch, and dinner"
Scabies - paules and papulovesicles of wrist and hand
Insect Bites Intensely pruritic, red, distinct papules characterize these lesions.
Primary Skin Lesions Insect bites.
Bulla. Bullous insect bite reaction.
Common lice of humans: (A) head louse (Pediculus humanus capitis), (B) body louse (Pediculus humanus humanus), (C) pubic louse (Pthirus pubis).
Common lice of humans: (A) head louse (Pediculus humanus capitis), (B) body louse (Pediculus humanus humanus), (C) pubic louse (Pthirus pu...
Mosquito bites: arm, infant
pediculosis capitis (head lice)
Bug bites - pruritic urticarial wheels with punctum