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69 Cards in this Set

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Nematodirus egg

Trichostrongylid egg

Trichuris (whipworm)

Name all three egg species

Name all three egg genera

far left - trichostrongylid


middle (largest) - nematodirus


right (lower) - trichuris

Trichuris

Cooperia (1 cm long as adult)

In cattle

Haemonchus placei


(Barber's pole)

Ostertagia Ostertagi


(emerging from gland)

Osteragia osteragia


(male's tail)

trichostrongyloidea egg

Ostertagia Ostertagi


(male)

Nematodirus egg


(150-200 um long, 75-100 um wide)

in sheep

Trichuris ovis


(70-80 um long, 30-40 um wide)

Haemonchus contortus

Ostertagia ostertagi


(developing L4 in gland)

Haemonchus contortus


(adult is 2-3 cm long)

Strongyle egg

Haemonchus contortus in abomasum


(largest abomasum nematode)

Trichinella Spiralis


(adult is 3 mm long)

Trichuris suis (whipworm)


adults are 4-6 cm long

Trichinella psuedospiralis


(uncapsulated species in muscle)

Capsulated Trichinella species (spiralis, nativa, T6)


In muscle

in a pig

Trichuris suis

In a pig

In a pig

Oesophagostomum

In pig

In pig

Trichuris suis

Oesophagostomum

Trichinella spiralis


encapsulated in nurse cells (converted muscle cells)



pig intestine

pig intestine

Trichuris suis


(heads embedded in mucosa)

Ascaris suum


(unlarvated egg)

from pig

from pig

Ascaris suum

Trichinella spiralis


(in epithelial cell)

Ascaris Suum


(larvated egg)

in foal

in foal

Parascaris equorum


(mostly in duodenum and proximal jejunum)

in foal

in foal

Stongyloides westeri


(adults under 1 cm long)

Cyathastomins


(small strongyle)

in foal

in foal

Parascaris equorum


(up to 40 cm long - disgusting)

Ascaris suum


(develop to L3, infective stage, in the egg)

in foal

in foal

Strongyloides westeri


(can see little larva inside)

On horse pasture

On horse pasture

cyathastomins

Parascaris equorum

Cyathastomins


(adults are red)

Strongylus vulgaris


(1.5 - 2.5 cm)

Oxyuris equi


(male is 1 cm long, female is 10 cm long)

cranial mesenteric artery

cranial mesenteric artery

Strongylus vulgaris


(larvae)

in horse feces

in horse feces

Cyathastomins


(egg count low in acute cyathastominosis)

Fasciola hepatica


(2.5 - 3.5 cm long and 1 cm wide)

what is making this liver unhappy

what is making this liver unhappy

Ascaris suum


(milk spots in pig livers)

what is making this sheep liver unhappy

what is making this sheep liver unhappy

Fasciola hepatica


(acute fasciolosis, acute occurs in sheep only)

In horse

In horse

Cyathastomins


(encysted larvae that can reactivate simultaneously)

Miracidium


(hatches from Faschiola spp. egg in environment and infects lymnea (or galba) snails)

Fascioloides magna


(adult up to 8 cm long - yuck)

Dicrocoelium dendriticum


(adult is < 1 cm long)

this egg is 160 um by 95 up

this egg is 160 um by 95 up

Fascioloides magna


(larger egg than Fasciola hepatica but otherwise similar)

Oxyuris equi


(hang out in large intestine)

Fasciola hepatica


(chronic fasciolosis)

what is making this cow liver unhappy

what is making this cow liver unhappy

Fascioloides magna


(cattle are dead end hosts and flukes become encapsulated in cysts - ouch)

Oxyuris equi


(laid in skin of perianal region)

Metacercaria of Fasciola spp.


(found on vegetation and eaten by definitive host)

Cercaria of Fasciola spp.


(develop into metacercaria in the environment)

Oxyuris equi


(horse rubs off skin flakes with eggs into environment)

what is making this horse intestine unhappy

what is making this horse intestine unhappy

Strongylus vulgaris larvae


(infarction due to larval damage to the cranial mesenteric artery)

Paraphistomum


(hangs out in the rumen and reticulum or ruminants worldwide)

what is making this ant want to climb up and be eaten (how mean)

what is making this ant want to climb up and be eaten (how mean)

Dicrocoelium dendriticum


(brown ants are intermediate host, land snails are other intermediate host)

this egg is 130-150 um by 63-90 um

this egg is 130-150 um by 63-90 um

Fasciola hepatica


(arrow is pointing to the operculum)

Dicrocoelium dendriticum


(requires a zinc sulphate flotation)

Two different species

Two different species

a) Paramphistomum (look like Fasciola but clearer)


b) Fasciola

What is making this sheep liver unhappy

What is making this sheep liver unhappy

Fasciola hepatica


(sheep are aberrant hosts and usually die within a few months of infection - poor sheepy)

three species of abomasal nematodes based on size

three species of abomasal nematodes based on size

left - Haemonchus


middle - Ostertagia


right - trichostrongylus

what is making this abomasum unhappy

what is making this abomasum unhappy

Ostertagia ostertagi


(hyperplasia of the abomasal mucosa)