Veterinary Clinical Parasitology Flashcards
Acanthocephalans of birds
Polymorphus and Filicollis with arthropods as IH
Morphology of Strongylid L3 in horses
Strongyloides westeri: no sheath, very long esophagus
T. axei: short tail, not filamentous (stomach hairworm)
Cyathostominae: 8, triangular
Gyalocephalus (small strongyle): 12, rectangular
Oesophagodontus (small strongyle): 16, triangular
Posteriostomum (small strongyle): 16, roughly rectangular
Strongylus equinus: 16, poorly defined, rectangular
Triodontophorus (large strongyle): 18-20, well-defined, rectangular
Strongylus edentatus: 18-20, poorly defined, elongated
Strongylus vulgaris: 28-32, well-defined, rectangular
Morphology strongylid L3 larvae in ruminants
Trichostrongylus and Ostertagia/teladorsagia have short tails, have to exsheath to see if there are tubercles (Trichostrongylus, T. vitrinus has two)
Haemonchus and Cooperia have medium tails but Cooperia has oval bodies in the anterior end
Long tail: Nematodirus 8 intestinal cells, bunostomum small larva, Oesophagostomum 16-24 intestinal cells, and Chabertia 24-32 intestinal cells
Abomasal nematodes of ruminants by size (largest to smallest): Mecistocirrus (43 mm), Haemonchus (14-30 mm), Ostertagia/Teladorsagia (7-9), Trichostrongylus axei (7 mm)
Small intestinal nematodes of ruminants by size (largest to smallest): Nematodirus (20-25 mm), Cooperia (6-16 mm), Trichostrongylus colubriformis (6-7 mm)
Trematodes of dogs
Alaria, small intestine , Helisona 1st IH, Frogs 2nd IH, infective stage is called mesocercaria
Paragonimus, lung, Pomatiopsis 1st IH, Crayfish 2nd IH, has an abopercular bump
Nanophyetus salmincola, small intestine, Oxytrema, Salmon, transmit Neorickettsia helminthoeca
Heterobilharzia, mesenteric and hepatic portal veins, Lymnaea, no 2nd IH as cervarias penetrate through skin. Eggs hatch miracidium when in contact with water
Platynosomum (in cats), in gall bladder and bile ducts, snail (Suburbia) and 2nd IH is pill bug, lizards and amphibians are paratenic hosts. It has a fully formed miracidia when passed in feces
Cryptocotyle, in intestine, Littorina 1stIH, fish 2ndIH, egg’s undifferentiated when passed on feces
Metorchis, bile ducts and gallbladder, snail is 1IH fish is 2ndIH
Eurytrema, pancreatic ducts, snails 1stIH, arthropods 2nd IH
Identical to H. contortus
Mecistocirrus digitatus, difference is that the anus is closer to the vulva in this one
Similar egg to Nematodirus
Marshallagia marshalli but this is from the abomasum and has less pointed polars
Difference between D. filaria and P. rufescens
The former is amphidelphic and has a cephalic button and the latter is prodelphic
Lungworms that have more than one dorsal spine
Cystocaulus and Neostrongylus
Cestodes of horses
Anoplocephala perfoliata, adult has lapets and the eggs is bigger than 60 um
Anoplocephala magna
Paranoplocephala mamillana
Spirurids of pigs
Physocephalus and Ascarops
Eimeria species of swine
E. porci, E. scabra, E. spinosa
IH of Metastrongylus? And what stage do we see in feces
Earthworm and embryonated egg
IH of M. ingens and M. hirudinaceus
Narceus giant millipede and beetles
Paratenic host of Oncicola canis
Armadillo
Eimeria species in birds and predilection sites
E. acervulina, duodenum
E. necatrix and E. maxima, jejunum
E. tenella, cecum
E. brunetti, rectum
