december 3, 2013 dr. jeffrey musser bugs in your blood: malaria!
TRANSCRIPT
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December 3, 2013
Dr. Jeffrey Musser
http://www.ghananewsagency.org
Bugs in your Blood: Malaria!
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Malaria’s ImpactWorldwide Incidence
350 to 500 million clinical cases
> 1,000,000 deaths each year
800,000 are children < 5 yrs. old
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Where does malaria occur?
World Health Organization, January 2004
Tropic ofCancer
Equator
Tropic ofCapricorn
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Malaria - Questions
Where does malaria occur?
How did it get there?
What is malaria?
How people get malaria?
What are the clinical signs?
- what happens to infected people?
- life cycle of malaria?
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Questions
Malaria in Texas -how did it get here and
why is it not here now?
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Misinformation on the Web
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What do you know aboutMalaria?
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What is Malaria?
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What is Malaria?
Art.com Art.com
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What is Malaria?
Art.com
protozoan parasite, a single-celled organisms, that infects red blood cells
Plasmodium sp.
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Early History
Has infected man during known history
Originated in Africa and followed human migration
Malaria
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Where and when did Malaria first occur?
AFRICA
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Malaria3 Demons: Chills, Fever, Headaches
Nei Ching 2700 BC
Great cold, intense shivering, body convulsing
Fever up to 106º, great thirst
Massive headaches
~6 hours, fever breaks
Cycles every 48 or 72 hrs., depending on malaria species
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Miasma theorya poisonous air exhaled by decaying
vegetable matter, especially by swamps
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Malaria lifecycle before 1876
3 Demons: Chills, Fever, Headaches3 Demons: Chills, Fever, Headaches
MiasmaMiasma
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Charles Laveran
Military physician stationed in Algeria in 1876
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Malaria in 1876
Algeria
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What did he see?
Plasmodium spp.protozoan parasite – single-celled organisms
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Malaria lifecycle
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Malaria in 1897
India
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Sir Ronald RossIndia 1897
20 August 1897
Found the malaria protozoan in the stomach of an Anopheles mosquito…
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“… clear and almost perfectly circular outline … another, and another exactly similar cell.
Here was the clue … the mosquito itself had become infected”
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The Anopheles mosquito was the vector
An organism (such as an insect or rodent) that transmits a pathogen
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Malaria lifecycle
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Malaria lifecycle
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Malaria lifecycle & illness
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Malaria is species specific
Humans
Primates
Birds
Reptiles
All Plasmodium but different species
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http://animal.discovery.com/videos/monsters-inside-me-malaria-parasite.html http://animal.discovery.com/videos/monsters-inside-me-malaria-parasite.html
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Malaria comes to the Americas
No malaria priorNo malaria priorto 1492to 1492
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Malaria comes to the Americas1492 – European exploration
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Malaria in the U.S.
circa 1850
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Malaria in the U.S.
circa 1912
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Malaria in the U.S.
circa 2012
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For Malaria to persist, need
Reservoir – where the mosquitoes get the parasite
Vector – Anopheles mosquitoes
Host – the animal that gets infected
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Elimination andPrevention of Malaria
• Reduce contact with vector• Reduce reservoir
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Elimination andPrevention of Malaria
• Reduce contact with vector
Is the vector in Texas?
Mosquito is the vector
YES!!!
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Elimination andPrevention of Malaria
• Reduce contact with vector
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Elimination andPrevention of Malaria
• Reduce contact with vector
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Elimination andPrevention of Malaria
• Reduce contact with vector• Reduce reservoir
Infected person
Infected person
Infected mosquito
Infected Mosquito gets infected by biting infected person
- where the mosquitoes get the parasite
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Elimination andPrevention of Malaria
• Reduce contact with vector• Reduce reservoir
No endemic malaria
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Land Area
www.worldmapper.org
www.worldmapper.org
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www.worldmapper.org
Malaria Deaths
www.worldmapper.org
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Mortality 1-4 Year Olds
www.worldmapper.org
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Remember, protect yourselfRemember,