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10 Cards in this Set
- Front
- Back
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Piroplasms
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Indirect - Vector & Vertebrate
- Ixodid tick usually vector, bite injects sporozoites Only Asexual stage in verts, first gen in RBC |
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Babesia
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Babesiosis, each sp with spec host
Tick innoc sporozoites w/bit - Directly infect host RBC -> piroplasms -> merozoites by binar fission in 2/4 daughter cells No schizogony, unlim generations, some turn into gametocytes Tick takes up infected RBC, gametocytes fuse, form motile zygote (kinete) Kinete invades tick tissues (saliv glands, ovaries), is transoviral. Sprogony in salivary glands Iatrogenic tans via bld/fighting possible Teardrop shape in RBC |
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Canine babesiosis
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B canis vogeli/gibsoni/conradae
Endemic areas, kennels, in S-SE US Usually young dogs, 1-3 wks post bite Intra/extra vascular rbc hemolysis - Regenerative anemia, hemoglobinuria/inemia, icterus, DIC Blood smear, serology Tx - Imidocarb diproprionate, can revcover from acute w/o tx |
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Bovine babesiosis
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B. bigemina, eradicated from US after cattle dipping eradicated Boophilus annulatus vector
One-host tick (all stage on same animal) Is in Mexico |
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Equine babesiosis
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Biliary fever - B. caballi, B. equi (smaller, more prevalent)
Vector: Dermacentor Tropic/subtropics, reportable in USA Signs 5-21 dpi, rare peracute fatal 1-2days Dx - parasite in rbc, serology Tx - Imizol, may need transfusion |
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Theileria spp
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Theileriosis - not in US. Production animals - cow/water bufallo
T. parva - East Coast Fever - Tink inoculated salivary sporozoites enter T/B lympho, + pathogen, calves more resis than adult 8-15 days PI - fever, nasal discharge, + ln, bldy d+ Multiple forms in blood smear Signs - Acute lethargy, anorexia, icterus, fever, decr CRT, dyspnea, death in weeks w/o tx Hematology - Normochromic anemia, leukpenia, lymphopenia, thrimbocytopenia +spleen, +liver, +ln, renal edema, lung edema/congstion, venous distension |
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Cytauxzoon felis
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Cytauxzoonosis - domestic cat, Reservoir - Bobcat (sub-clin persist)
- Vector - Ixodid Sporozoites - inoc via tick bite Schizogony - in macro in body (spleen/liver) Merozoites - enter rbcs -> piroplasm, eaten by ticks - Diff into gametes, fust to form zygote, ookinete |
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Plasmodium
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Primate, rodent, reptile, bird
Bird malaria - culcine mosquito vector - Mosq inco sporozoite -> enters hepatocyte -> pre-RBC merogony -> merozoite release, infect RBC-> merogony ->release merozoites invade more RBC or become micro/macro gemtocytes that infect mosquito -> form zygote in mosquito, then ookinete -> invades midgut wall ->oocyst -> ruptures, 1000s sporozoites in hemocoel -> migrate to salivary gland Birds - chills, fever, anemia, + liver, gametocytes also in RBCS Dx - paraiste in blood smear |
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Leucocytozoon
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Blackfly vector. Affects Ducks, Geese
- megaloschizonts in parenchymal & RE cells, all major organs - Anorexia, dyspnea, + liver, anemia, death - Gametocytes in/distort WBC |
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Haemoproteus
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Biting midge vector, in bird spp
Low pathogenicity Merogony in endothelial bv cells Gametocytes develop in RBC |
