ricketsia rickettsii chris bednar. bacterial tick borne american dog tick (dermacentor variabilis)...
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Ricketsia rickettsiiRicketsia rickettsii
Chris BednarChris Bednar
Bacterial
Tick borne• American dog tick (Dermacentor variabilis)• Brown dog tick (Rhipicephalus sanguineus)• Rocky Mountain wood tick (Dermacentor
andersoni)
Host to host transfer
• 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%
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
Host species• Opossums• Rabbits• Squirrels• Rodents
Domestic Animals• Dogs• Cats• Cows• Horses
Other Common Species• Deer• Skunk• Woodchucks• Beavers• Foxes• Wolves• Coyotes• Humans• Etc.
Most wildlife go untreated
Doxycycline in humans and dogs
Prophylaxis as preventative
Antibiotics not effective as protection
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