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ENTOM Week 6 Lecture Notes

by: Irene A.

ENTOM Week 6 Lecture Notes 8404

Marketplace > Washington State University > Biology > 8404 > ENTOM Week 6 Lecture Notes
Irene A.
GPA 3.5
Dr. Owen

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About this Document

Discussions about how weather, landscape and vectors affect disease transmission; mosquito life cycles and reproduction; West Nile Virus.
Dr. Owen
Class Notes
entomology, insects, illness, disease
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This 4 page Class Notes was uploaded by Irene A. on Thursday February 19, 2015. The Class Notes belongs to 8404 at Washington State University taught by Dr. Owen in Winter2015. Since its upload, it has received 81 views. For similar materials see ENTOM 102 in Biology at Washington State University.


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Date Created: 02/19/15
ENTOM 102 WEEK 6 NOTES Weather Landscape amp Vectors I a vehicle way that something gets moved around 0 path for transmission 0 Infectious diseases what makes you sick 0 germpathogen O route of transmission coughingsneezing O insects used by parasites as vehicles I 3 entities involved person virus insect that transmits virus I insect is not a neutral party has biology complex behavior etc 0 Resources 0 Human needs foot water shelter air 0 Mosquito needs food amp water blood shelter air 0 Growth amp Development 0 linked to life expectancy I puberty sexual organ development I life cycle birth gt death I everything exists solely to survive amp reproduce 0 What do you need humans amp mosquitoes I environment suburb vs poverty affects life expectancy I socializing mosquitoes interact w peopleanimals to get blood I interacting w food plants amp animals 0 Why do mosquitoes feed on owers 0 water sugar no animals around digestion something to make the gut work efficiently 0 more reliableless risk fixed location I most ectoparasites are killed by their hosts 0 Development stages of life 0 mosquitoes have adult amp juvenile are dissimilar 0 female mosquitoes lay eggs in water larvae live in water 0 offspring are independent from parent 0 Why so much variation in development time 0 human sexual maturityability to reproduce at 1316 years I rate of growth mostly in uenced by genes I relatively little variation based on environment 0 mosquito 540 days to sexual maturity I more time variation than humans I more in uence from environment I exible in how they develop 0 Things mosquitoes need 0 blood gt nutrients gt eggs offspring 0 water gt laying eggs 0 sugar gt energy like fuel for an engine 0 Things that affect speed of growth 0 food energy 0 temperature more food when warmer 0 light amp humidity O Insect39s rate of growth is I most insects don39t maintain internal body temp in uenced by ambient temperatures Temperature amp Growth ltD gt 0 quotsweet spotquot where life occurs not too hot or too cold What affects temperature 0 Sun 0 seasons earth rotates amp orbits sun tilt of earth affects direction amp amount of sunlight I water climate 0 wind air moving around due to temperature difference 0 Climate change global warming weather is never uniform O danger of anecdote people point to places that are cold 0 How does this relate to mosquitoes I What mosquitoes eat 0 adults blood amp ower nectar O juveniles debrisalgaebacteriadecaying quotstuffquot in water act like filter feeders 0 what shapes weather I topography planet movement West Nile Virus 0 virus transmitted back amp forth between mosquitoes amp birds 0 people amp horses don39t transmit virus back to mosquito I mosquito only picks up virus from birds 0 80 people asymptomatic 0 20 people have ulike symptoms 0 06 people have severe illness I Occurs throughout US 0 came to states in 1999 due to a mosquito trapped in a plane cabin 0 occurs in pockets not a uniform blanket 0 only found when mosquitoes are around I should we see WNV 0 summer I should we see WNV 0 places that are hot amp humid 0 more severe weather events many places experiencing severe drought 0 many WNV cases occur in hot dry places texas california etc 0 play a role in providing a habitat for mosquitoes I male amp female mosquitoes feed on owers to get sugar I mosquitoes that consume sugar have an increased life expectancy I crops are irrigated by water gt crops grow owers gt mosquitoes eat ower nectar gt sugar increases life expectancy gt mosquitoes lay eggs in water I when a mosquitoes39 life span is increased it has more ODDOI tIlHitiCS to transmit disease


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