BIOL 4010 Lecture Notes - Lecture 18: Trench Fever, Body Louse, Endocarditis
30 Dec 2020
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Document Summary
Conditions: lice are parasitic insects that suck blood, lice outbreaks are common in schools and long-term homes, 3 species of lice: Head lice: common at back & sides of scalp, louse saliva or fecal material causes hypersensitivity reaction itchy papules, secondary bacterial infections due to scratching. Body lice: body lice take blood meals at night, results in nighttime pruritus, bite sites are sky-blue, slate-colored macules. Pubic lice: appear as small, yellow brown to grey dots, bits may appear as blue-grey skin discoloration, pruritus in genital areas, also affects eyelashes, eyebrows, bears & other hairy areas. R- region & radiation: pubic, head and body, head: scalp, body: waist, axillae (trunk, pubic lice: pubic/genital, eyelashes, eyebrows, beard. S- severity, symptoms: pruritis, primary lesions: papules, secondary lesions: Differential diagnosis: dandruff, seborrheic dermatitis, accumulation of hair cosmetics, eczema. Common populations: head lice: children, body lice: poor hygiene, public lice: sexually active.
