Memory Matching Parasite Identifying CharacteristicsVersion en ligne Match the appropriate description of each phyiscal attribute to the correct parasite par Olivia Ortiz Toxascaris leonina oval-ellipsoid shape, thin walls, contains a morula, smaller than Ucinaria corticated shell, spherical shape, deeply pigmented, larger than T. cati Ancylostoma spp. Toxocara cati thin-shelled eggs; contain a miracidium Alaria spp. oval-ellipsoid shape, thin walls, contains a morula, larger than Ancylostoma spp. very large; golden brown; thin, smooth walls; operculated; larger than P. kellicoti small; oval; thick shelled; brown; operculated; contain ciliated miracidium operculated; yellow-brown colored; contains an undifferentiated embryo surrounded by yolk cells Heterobilharzia americanum large; golden brown; operculated; asymmetrical Toxocara canis Nanophyteus salmincola Platynosomum fastosum corticated shell, spherical shape, pigmented, smaller than T. canis spherical-ovid shape, decorticated shell, hyaline central portion Ucinaria stenocephala Paragonimus kellicoti oval-ellipsoid; thick walls; contains four nuclei inside Eucoleus boehmi Aelurostrongylus abstrusus Trichuris vulpis Tritrichomonas foetus browinsh; operculated; contain a fully formed miracidium; very small Trypanosoma cruzi Filaroides osleri elongated, flagellated forms called trypomastigotes that circulate in the bloodstream barrel shaped, thick and smooth outer surface, corticated shell, bilateral operculums, asymmetrical, lighter in color curly shaped, spicule tail and is a motile larvae large; operculated; brown; oval; unembryonated single-celled, pear-shaped trophozoite; has flagella Fasicola hepatica Eucoleus aerophilus Giardia duodenalis football shaped, smooth shell, bilateral operculums, symmetrical, umebryonated, yellow/brown color barrel shaped, rough shell, bilateral operculums, asymmetrical, lighter in color Dicrocoelium dendriticum larval tail has a kink and has a blunt, rounded head small; oval; found intracellularly Baylisascaris procyonis barrel shaped, bipolar operculums, thick and pitted shell, brown/yellow color small, thick shell, embryonated, slightly elongated double-layered walls that contain four sporocysts, each with two sporozoites, once sporulated Dioctophyma renale Eimeria leuckarti/Eimeria macusaniensis Pearsonema spp. Eimeria zuernii spherical to ellipsoid shape; thin and smooth walled; clear-pale yellow in color ellipsoid shaped, thin shelled, decorticated, rapidly developing larvae thick walls; distinct micropyle; large; brown colored; pear shaped spherical shaped, deeply pigmented, corticated shell, smaller than Toxocara Spirocerca lupi Eimeria spp. Strongyloides stercoralis oval; thick walled; thin shell; smooth small, bipolar plugs, asymmetrical, textured walls, clear/yellow color Cystoisospora spp. Leishmania spp. Toxoplasma gondii spherical; thin shell; smooth Haemonchus contortus very small; each ovum contains four sporozoites oval, thin-shelled ovum; contain four or more morula inside elliptical shape; small; smooth; thick shells; contain a coiled larva Cystoisospora suis ellipsoidal to sub-spherical; have a thin, smooth shell Sarcocyst spp. larvae have a tricuspid tail Cryptosporidium spp. has both sporulated and unsporulated ova; rarely found in fecal preparations blunt cephalic end with a button or hooked curve at the caudel end; body is usually curved Physaloptera spp. Dirofilaria immitis Acanthocheilonema reconditum extremely small, sporulated Ollulanus tricuspis Neospora caninum tapered cephalic end with a straight caudal end shape; body is usually straight Mallophaga spp. ova is larger and more easily identified with a visible morula containing 4-8 cells; have tapering ends oval, thin-shelled ovum; contain four or more morula inside Nematodirus spathiger dorsoventrally flattened; wider head than thorax; wingless Ostertagia ostertagi Ixodes scapularis ellipsoid shaped; thin shelled; contains a rapidly developing larvae wingless; reddish-brown to black; sucking mouthparts; laterally compressed; jumping legs Ctenocephalides felis Dermacentor variabilis Toxocara vitulorum Strongyloides spp. Oesophagostomum spp. Anoplura spp. hard ticks; inornate scutums; long palps; anal groove; smaller size strongyle-type ova; oval shaped; thin shelled; contain a morula subglobular or round with a finely pitted shell; large worms hard ticks; ornate scutums; short palps; rectangular basis capituli dorsoventrally flattened; narrow mouth and head; wingless football shaped; thick, smooth shell; bilateral operculums; symmetrical; unembryonated; smaller than T. ovis Macracanthorhynchus hirudinaceus Ascaris suum football shaped; thick, smooth shell; bilateral operculums; symmetrical; unembryonated; larger than T. suis hard tick; ight reddish-tan to dark reddish with brown markings Trichuris ovis Otobius megnini soft tick; has thousands of small spines along its body very large; strongyle-type ova; thin shelled; ellipsoidal eggs; contains a morula oval shape; thick, pitted shell; shell has prominent projections = lumpy/bumpy appearance; golden brown color hard tick; inornate scutum; hexagonal capitulum; short palps; larger size Trichuris suis soft tick; flattened; oval-shaped Rhipicephalus annulatus resemble ascarid ova; oval shaped; thick, dark brown, textured shell Stephanurus dentatus hard tick; ornate scutum; long palps; rectangular basis capituli Haemaphysalis longicornis Amblyomma americanum Argas persicus oval shaped body with long legs that extend out from the body with visible suckers on the ends of the pedicels Parascaris equorum appears like a sarcoptes mite, but with short legs; flattened dorsal side with blunt spines; a dorsal anus Sarcoptes scabiei Cyathostomes elongated ova that have thin walls Psoroptes ovis Otodectes cynotis Notoedres cati typical strongyle-type ova; similar to hooks; elliptical shaped; thin walls; many cells inside; cannot differentiate from small strongyles suckers are present on short segmented pedicels typical strongyle-type ova; similar to hooks; elliptical shaped; thin walls; many cells inside; cannot differentiate from large strongyles Oxyuris equi long legs and long unjointed pedicels Strongylus spp. Chorioptes bovis Habronema spp. dark, subglobular ova; thick pitted shells oval mite with eight short legs; flattened, tortoise-like body single operculum; smooth; elongated ova; flat side with operculum Dictyocaulus arnfieldi larval tails have undulating tips and dorsal spines very large (seen with naked eye); extremely long legs with comb-like structures on the ends; large hooks on mouth long, slender, "cigar-shaped" body; four pairs of short legs located at its front; semi-transparent wingless flies no cuticular knob, straight tail, food granules inside ova are passed larvated, but appear like ascarid ova with oval shape and thick walls Cheyletiella spp. Stomoxys calcitrans anterior cuticular knob, blunt tail, food granules inside Dictyocaulus filaria Metastrongylus apri 3-part body and ventral stink glands Melophagus ovinus larvae visible within ova; thin-shelled Demodex canis Dictyocaulus viviparus Cimex lectularius rigid, bayonet-like proboscis used to inflict painful bites Muellerius capillaris ova are operculated; unembryonated; thick shelled; oval shaped Spirometra mansonoides Dipylidium caninum Taenia spp. Diphyllobothrium latum thick, radially striated shell; each egg contains a hexacanth larva with six hooks, not all of which are visible in every egg; cannot differentiate with Taenia greatly resemble Diphyllobothrium; eggs have pointed ends instead of rounded ones Echinococcus spp. thick, radially striated shell; each egg contains a hexacanth larva with six hooks, not all of which are visible in every egg; cannot differentiate with Echinococcus large egg packet that contains multiple ova Mesocestoides spp. Hymenolepis spp. angular; thick-walled; "D" shaped; contains a distinct hexacanth embryo large, triangular eggs Moniezia benedeni Moniezia expansa three delicate, enclosing membranes and three pairs of hooks Anoplocephala perfoliata visible embryonic hooks; thin walled; oval shaped; contain a hexacanth embryo large, square eggs
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