March 7 lecture handout-1

March 7 lecture handout-1 - Blood Feeding Why We Know About...

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1 Blood Feeding Why We Know About Blood Feeding: Vector-borne disease transmission depends on bloodfeeding Arthropod vectors: ticks, mosquitoes, biting flies, fleas, bloodfeeding bugs, mites, lice Why feed on blood? Arthropods feed in different ways: piercing-sucking, tearing-rasping suggests bloodfeeding evolved multiple times Hematophagy (bloodfeeding) has evolved independently at least 21 times (black dots) in arthropods
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2 Hematophagy (bloodfeeding) has evolved independently at least 21 times (black dots) in arthropods Ticks Before Feeding After Feeding All stages eat blood Anaplasmosis Babesiosis Ehrlichiosis Lyme disease Rickettsia parkeri Rickettsiosis Rocky Mountain Spotted Fever (RMSF) STARI (Southern Tick-Associated Rash Illness) Tickborne relapsing fever (TBRF) Tularemia 364D Rickettsiosis Tick-borne diseases in the US
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3 Hematophagy (bloodfeeding) has evolved independently at least 21 times (black dots) in arthropods Bedbugs All Stages Eat Blood Disease Agents Vectored by Hemiptera • Trypanosomes (Chaga’s disease) • No disease transmission known by bedbugs
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This note was uploaded on 03/21/2012 for the course ENTOMOLOGY 104 taught by Professor Lewis during the Spring '12 term at UC Davis.

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March 7 lecture handout-1 - Blood Feeding Why We Know About...

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