ricketsia rickettsii chris bednar. bacterial tick borne american dog tick (dermacentor variabilis)...
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Ricketsia rickettsiiRicketsia rickettsii
Chris BednarChris Bednar
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Bacterial
Tick borne• American dog tick (Dermacentor variabilis)• Brown dog tick (Rhipicephalus sanguineus)• Rocky Mountain wood tick (Dermacentor
andersoni)
Host to host transfer
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• Tall grass, wooded areas
• Eastern US
• Discovered in Rocky Mountains
• Red states – 60%
•Only about 100 cases reported per year
•Human and domestic fatality down to 1%
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Flu-like symptoms Characteristic “spotting”
• 10% not affected• Red or purple
Abdominal pain Challenging to diagnose
• Similar to other bacterial and viral infections• Similar to other tick borne diseases
Not just in humans• More challenging in animals
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Host species• Opossums• Rabbits• Squirrels• Rodents
Domestic Animals• Dogs• Cats• Cows• Horses
Other Common Species• Deer• Skunk• Woodchucks• Beavers• Foxes• Wolves• Coyotes• Humans• Etc.
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Most wildlife go untreated
Doxycycline in humans and dogs
Prophylaxis as preventative
Antibiotics not effective as protection
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ReferencesControl, C. f. (2011, January 18). Rocky
Mountain Spotted Fever. Retrieved February 14, 2011, from The Center for Disease Control: http://www.cdc.gov/rmsf/index.html
Health, V. P. (2007, April). Veterinarian’s Brief: Suspected Rocky Mountain Spotted Fever in 4 Los Angeles County Dogs. Retrieved February 14, 2011, from LA Public Health: http://publichealth.lacounty.gov/vet/Rockymountainspottedfever.htm