How to ControlHead Lice.ppt

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1、How to Control Head Lice,A tutorial for school officials and concerned parents,Adult lice are about 1/8 inch long. Lice are wingless, bloodsucking insects. Lice have claws and move by crawling. Lice cannot jump.,Beginning to feed,Full of blood,Description of Adult Lice,Lice eggs are called nits. Nit

2、s are oval, white-gray-tan-dark brown cylinders about 1/16 inch long. Nits are glued to hairs very near the scalp. Older nits are found far from the scalp due to hair growth.,Nits glued to hair shaft,White eggs glued to hair,Description of Lice Eggs,Lice eggs hatch within seven to 10 days. Baby lice

3、, also called nymphs, become adults in two weeks. Only adults can lay eggs.,Baby lice (nymph),UNL,Lice Biology,Prevention: Inspect frequently. Treatment: May include use of lice shampoo. Treatment of Belongings: Wash bedding and clothing in hot soapy water. Dry using “high heat” cycle. Bag other ite

4、ms. Post-treatment Inspection: Inspect individuals up to 10 days following treatment.,4 Steps to Lice Eradication,Head lice are spread by infested people. Pets cannot get or spread head lice. Only people get head lice. Children should not share combs, hats and personal belongings. Frequent inspectio

5、ns are a must. Search entire head, especially back of head and neck. Part hair section by section. Remove lice with tweezers or lice comb. Be careful not to spread lice to others while inspecting.,Prevention of Head Lice,Remove lice and nits using lice comb. Place lice and nits in soapy water or fre

6、eze. Wash all bedding and personal belongings in hot soapy water. Dry on “high heat” cycle.Shave childs head. Even a very short haircut can aid in detection and removal of lice.,Option #1 Non-chemical Control,As a Last Resort,Wash hair with household shampoo. Completely wet hair with lice shampoo. A

7、dd warm water, leave product on head for recommended time - usually 10 minutes. Rinse thoroughly with warm water while removing any dead lice and nits. Retreatment may be necessary in seven to 10 days as this kills hatching eggs.,Option #2 Treatment with Lice Shampoo,Lice live their entire life cycl

8、e on the human body. Lice die within 24 hours after falling off the host. Treatment of classrooms with insecticidal sprays is unnecessary and may be hazardous.,Do Not Treat Classrooms,Acknowledgements,Author: Clay W. Scherer, University of Florida Photos: Paul M. Choate, University of Florida Clay W

9、. Scherer, University of Florida Life Cycle Graphic: University of Nebraska-Lincoln Design: Matthew B. Downey, University of Florida,This is one of several presentations available at the School IPM World Wide Web Site http:/schoolipm.ifas.ufl.edu/,Entomology and Nematology Department Copyright University of Florida 1998,