Protozoa and Rickettsia Flashcards
3 primary phyla of Protozoa
Sarcomastigophora, Apicomplexa, Ciliophora
Asexual reproduction
binary fission, schizogony, budding
sexual reproduction
syngamy, conjunction
stage of protozoal life cycle that is capable of feeding, movement, and reproduction
trophozoite
long whip-like structure
flagella
short flagella arranged in rows or tufts
cilia
temporary projections of and retractions of body wall
pseudopods
small snakelike waves that form cell membrane
ungulatory ridges
describe cyst stage
prevents desiccation, occurs when protozoa lacks nutrients, low O2, lack of water, low pH, accumulation of waste, overcrowding
move via pseudopodia, and have both trophozoite and cyst stage
amoebas
one or more flagella in trophozoite stage
flagellate
flagellated protozoa recovered from diarrhea in dogs and cats but can also be in normal feces (zoonotic)
Giardia
location of Giardia
small intestine
trophozoite of Giardia
rounded leaf shape, “eyes”, tail
cyst stage of Giardia
opalescent looking egg
parasite of humans and dogs, banana shaped with flagellum, 3-10x the size of RBC
Trypanosoma cruzi (Trypanosomes)
mucocutaneous leishmania forming skin sores
Leishmania braziliensis
visceral form of leishmania that affects several internal organs
L. donovani and L. infantum
long, slender organisms with single flagellum attached to dorsal surface that creates a “sail” (lil purple dude)
Trichomonads
Trichomonads in reproductive tract of cattle (resides in prepuce of bulls and vagine, cervix, and uterus of cows)
Tritrichomonas foetus
clinical signs of T. foetus
infertility, spontaneous abortions, and pyometra
shape of T. foetus
pear shaped with 3 anterior flagella
Trichomonads found crop (pouch like enlargement on birds)
Trichomonas gallinae
clinical signs of T. gallinae
necrotic ulcerations of esophagus, crop, and proventriculus
infects turkeys, chickens, pheasants, and other avian species
Histomonas meleagridis
in turkeys, H. meleagridis causes infectious enterohepatitis aka…
black head
primarily human parasite found in tropical regions with no clinical significance
Entamoeba histolytica
parasite found in sm. intestines of dogs and cats (egg shaped with 1 or 2 “yolks”)
Cystoisospora coccidiap
prepatent period of coccidia
7-14 days
intestinal coccidian of cats, very harmful to pregnant women
Toxoplasma gondii
coccidian of sm. intestines of wide variety of animals, zoonotic, picture with a bunch of them grouped together
Cryptosporidium
another coccidian of sm. intestines
Sarcocystis
intracellular parasite of RBCs in dogs aka piroplasm
Babesia canis
what does piroplasm mean
pear shaped
intracellular parasite of RBCs in cats, rapidly fatal, causes multiple organ failure
Cytauxzoon felis
intracellular, malaria like parasite affecting dogs (presents as little dot on the edge of RBC)
Hepatozoon canis and H. americanum
which is more severe? H. canis or H. americanum
H. americanum
coccidian found in sm. intestines of horses
Eimeria leuckarti
what cause malaria in mammals, birds, and reptiles
Plasmodium sp.
ciliated protozoan in large intestine in swine
Balantidium coli
