L12: Intergrated Vet Med Review Flashcards
how many nymphal stages do soft ticks have
2 or more
how many nymphal stages do hard ticks have
1
how fast/often do soft ticks feed? what about hard ticks?
soft ticks - fast and repeated
hard ticks - once slowly (F) or repeated fast (M)
are hard or soft ticks nidicolous
soft ticks - nidicolous (stay around burrow)
hard ticks - non nidicolous (can be found in open field)
Babesiosis is?
Cattle fever
what ticks cause Cattle Fever (Babesiosis)
Rhipicephalus microplus (Southern cattle tick)
Rhipicephalus annulatus (cattle tick)
what tick causes Pink brain
Rhipicephalus microplus
discoloration of the brain due to distension of blood vessels w/ parasitized erythrocytes that increase attachment factors causing red cells to clump together
Dermacentor albipictus
winter tick - affects moose causing hair and blood loss
one host tick
what is the host of the soft tick Ornithodoros spp
mainly mammals
what does Ornithodoros spp vector
Epizootic bovine abortion
“foothill abortion”
causes late term abotion, chronic fetal disease, weak calves
Ixodes, Ambylomma, Dermacentor and Rhipicephalus are all _____ ticks
hard (Ixodidae)
what makes ticks good vectors
- blood feeders
- wide host range
- long lived
- few natural predators
- high reproductive potential
- pathogen can be maintained in tick population
What causes pink brain, icterus, and splenomegaly in cattle?
Babesia bovis
What species of ticks is described?
- Hosts: mainly mammals
- Leathery cuticle
- Round body margin
- Vector for Borrelia spp., epizootic bovine abortion
Ornithodoros
What species of tick is described?
- most common tick in AZ
- major vector for Rocky Mountain Spotted Fever
Rhipicephalus sanguineus
Brown Dog Tick
Rickettsia rickettsii
rocky mountain spotted fever
Vector: *Dermacentor andersoni *in western US
Causative agent: Anaplasma marginale, A. centrale
Causes: hemolytic anemia, fever, depression, anorexia, 50% mortality in adults.
Bovine Anaplasmosis
vector: Ambylomma maculatum (Gulf Coast Tick)
unqiue transmission: ingest infected tick or ingest paratenic host
Causes: fever, weakness, leuocytosis “onion skin”
American Canine Hepatozoonosis
Hepatozoon americanum
vector: Ambylomma americanum & Dermacentor variabilis
transmitted by tick bite
affect cats
Cytauxzoon felis
Cytauxzoonosis
Tick paralysis is caused by salivary _______ which inhibit the release of ______ from axon terminal
neurotoxin
ACh
uncommon, noninfectious neurologic syndrome characterized by acute ataxia that progresses to ascending paralysis
Tick paralysis
what was the first ever described vector borne disease
Rocky Mountain Spotted Fever
parasite that causes equine stomach bot
Gasterophilius intestinalis
cuterebra larval migration in cats can lead to..
neurological issues and death
- feline ischemic encephalopathy
- multifocal cerebral hemorrhage
most common ectoparasite of dogs/cats in North America
Ctenocephalides felis (Cat flea)
what are the main differences b/w heartworm disease in dogs vs cats
dogs - high susceptibility, microfilaremia common, heart is primarily affected
cats - low susceptibility, microfilaremia uncommon, lungs are primarily affected
