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Spinose Ear Tick
Found in warm places - mainly out west
Often Feeds at night
Prevalent in wild turtkeys
Causes relapsing fever (Borrelia spp.) |
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| Relapsing fever is caused by |
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| Soft ticks have their capitulums located |
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| How can you tell the species of the engorged tick? |
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| Are you familiar with the location of the captitulum, festoons, and scutum of a tick? |
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| Are ticks considered insects? |
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| What class do ticks belong to? |
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| Nymphs and adults have _____ legs. |
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| Larval stages of ticks have ___ legs |
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| Which is harder to eradicate? A one host or two host tick? |
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| Rhibicephalis is a ____ host tick |
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| Which sex is known for taking a large blood meal and becoming 'engorged'? |
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| What happens if the barbed chelicerae remains lodged in the skin? |
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| strong immune response - very itchy |
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| Study the mouthparts of each spp. of tick |
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| Where is the anal groove found? |
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| Ventrally on all life stages |
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| Will the anal groove of the tick be seen if engorged? |
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| Describe the mouthparts of Ixodes spp. |
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| helicoptor maple-leaf shaped |
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| Pacific Northwest, Gulf Coast, East Coast, New England, Northern Mid-west USA |
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| T/F - infestation of Ixodes spp. in the East TN area is rare |
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Head piece characteristic of Darth Vader
Box turtle carapace looking color
Known for survival indoors
Favor dogs |
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| Rhidicephalus sanguineus - brown dog tick |
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complete life-cycel on one host
only adults drop off host after mating |
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larvae and nymphs feed on one host then drop off
adults feed on bigger host |
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all stages are found on different hosts
attach to host, take blood meal, then drop off to molt
can survive months to years between meals |
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| Egg->6-legged larvae->8-legged nymph->8-legged adult |
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| general life cycle of Ixodid |
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| T/F - nymphs and adults are less likely to harbor pathogens than larvae |
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| Why is it important to determine a 6 legged larvae from an 8 legged nymph or adult? |
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| because nymphs and adults are more likely to carry pathogens |
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| Vectors of this tick are Babesia canis, tularemia, Ehrlichia canis, and RMSF |
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| Rhipicephalus sanguineus - brown dog tick |
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| Most important diseases transferred by Rhipicephalus sanguineus are |
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| Babesia canis and Ehrlichia canis |
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| Only female has a white dot in this spp. |
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| Amblyomma americanium - Lone Star Tick |
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| Distribution of Amblyomma americanum |
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| Eastern half of the United States starting at Texas and moving east; running from north to south |
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| Describe Amblyomma americanum's mouthparts |
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| The saliva of this spp of tick is very antigenic |
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| Amblyomma americanum - lone star tick |
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Festoons present
Long mouth parts
Star eye disease
Female has white dot
Saliva very antigenic |
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| rash or infection caused by Amblyomma americanum - lone star tick |
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| Two genus of ticks that are most come in TN |
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| Dermacentor and Amblyomma |
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Stubby mouth parts and mottled appearance
slower moving - mone one leg at a time (tortoise walking) |
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| distribution throughout california and all over the eastern and middle US (not out west - excluding California) |
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| Dermacentor variabilis - American Dog Tick |
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| Known for transmitting RMSF |
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| 80% mortality - if see spot rashes go to hospital immediately! |
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Long mouth parts
moving north into TN
Ornate pattern |
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| long mouth parts and short base capitulum , often confused with Dermacentor so ID is primarily by mouth parts |
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| Distribution currently restricted to Southeastern USA and East coast - continually spreading |
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commonly mistaken for Ripicephilus
rarely seen on dogs |
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3 host tick
larvae and nymphs feed on birds, rodents, and larger mammals
Found in eastern US
Rarely seen on dogs
Commonly mistaken for Rhipicephalus |
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Bell shaped mouth parts
Almond color |
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| Common spp. of ticks found on TN dogs |
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| D. variabilis, A. americanum, R. sanguineus, |
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| Common spp. of TN ticks found on cats |
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| D. variabilis, A. americanum |
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| Prevalence of most common spp. of ticks on large mammals in TN |
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| A. americanum and A. maculatum, Ixodes spp. more common in middle TN |
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