Lice - Cooties All About Head Lice LT Greg Gorman, MC, USNR...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Cooties All About Head Lice LT Greg Gorman, MC, USNR Camp Lejeune, NC
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lice is a Big Deal Infests 6-12 million per year, mostly school-aged kids Does not carry disease, but carries huge social stigma Biggest problem: Parental Phobia School Hysteria
Background image of page 2
Know Your Enemy Pediculus humanus var capitis A blood-sucking insect whose only environment is the human scalp (warm, vascular) East a blood meal every 4-6 hours If not on scalp, lice die within 24 hours
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Know Your Enemy’s Reproductive Cycle This determines treatment, how to interpret findings and how to combat parental/school myths and phobias Egg Nymph Adult
Background image of page 4
Lice Eggs Several embryos in one egg Incomplete nervous system (not affected by drugs) Need heat to hatch, so always 1-3 mm from scalp Glued to hair shaft with chitin Have an “operculum” at top for air and humidity “Live” eggs are hard to see close to scalp and translucent Empty eggs (“nits”) are easier to see further from scalp as hair grows inside of egg is reflective Hatches after 7-12 days
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lice Nymphs Smaller than adults Molts 3 times in 8-9 days Cannot reproduce Not easily transmitted
Background image of page 6
Adult Lice Big as a sesame-seed; reddish-brown Cannot fly or hop Cling to hair shaft with 6 claws Claws evolved to conform to human scalp hair thickness Lay eggs 1-2 days after becoming adults Life-span is 30 days
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

Page1 / 19

Lice - Cooties All About Head Lice LT Greg Gorman, MC, USNR...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online