Parasitology Practical Images - Quiz 1

Front 1

Back 1

Nematodirus egg

Front 2

Back 2

Trichostrongylid egg

Front 3

Back 3

Trichuris (whipworm)

Front 4

Name all three egg genera

Back 4

far left - trichostrongylid

middle (largest) - nematodirus

right (lower) - trichuris

Front 5

Back 5

Trichuris

Front 6

Back 6

Cooperia (1 cm long as adult)

Front 7

In cattle

Back 7

Haemonchus placei

(Barber's pole)

Front 8

Back 8

Ostertagia Ostertagi

(emerging from gland)

Front 9

Back 9

Osteragia osteragia

(male's tail)

Front 10

Back 10

trichostrongyloidea egg

Front 11

Back 11

Ostertagia Ostertagi

(male)

Front 12

Back 12

Nematodirus egg

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

Front 13

in sheep

Back 13

Trichuris ovis

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

Front 14

Back 14

Haemonchus contortus

Front 15

Back 15

Ostertagia ostertagi

(developing L4 in gland)

Front 16

Back 16

Haemonchus contortus

(adult is 2-3 cm long)

Front 17

Back 17

Strongyle egg

Front 18

Back 18

Haemonchus contortus in abomasum

(largest abomasum nematode)

Front 19

Back 19

Trichinella Spiralis

(adult is 3 mm long)

Front 20

Back 20

Trichuris suis (whipworm)

adults are 4-6 cm long

Front 21

Back 21

Trichinella psuedospiralis

(uncapsulated species in muscle)

Front 22

Back 22

Capsulated Trichinella species (spiralis, nativa, T6)

In muscle

Front 23

in a pig

Back 23

Trichuris suis

Front 24

In a pig

Back 24

Oesophagostomum

Front 25

In pig

Back 25

Trichuris suis

Front 26

Back 26

Oesophagostomum

Front 27

Back 27

Trichinella spiralis

encapsulated in nurse cells (converted muscle cells)

Front 28

pig intestine

Back 28

Trichuris suis

(heads embedded in mucosa)

Front 29

Back 29

Ascaris suum

(unlarvated egg)

Front 30

from pig

Back 30

Ascaris suum

Front 31

Back 31

Trichinella spiralis

(in epithelial cell)

Front 32

Back 32

Ascaris Suum

(larvated egg)

Front 33

in foal

Back 33

Parascaris equorum

(mostly in duodenum and proximal jejunum)

Front 34

in foal

Back 34

Stongyloides westeri

(adults under 1 cm long)

Front 35

Back 35

Cyathastomins

(small strongyle)

Front 36

in foal

Back 36

Parascaris equorum

(up to 40 cm long - disgusting)

Front 37

Back 37

Ascaris suum

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

Front 38

in foal

Back 38

Strongyloides westeri

(can see little larva inside)

Front 39

On horse pasture

Back 39

cyathastomins

Front 40

Back 40

Parascaris equorum

Front 41

Back 41

Cyathastomins

(adults are red)

Front 42

Back 42

Strongylus vulgaris

(1.5 - 2.5 cm)

Front 43

Back 43

Oxyuris equi

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

Front 44

cranial mesenteric artery

Back 44

Strongylus vulgaris

(larvae)

Front 45

in horse feces

Back 45

Cyathastomins

(egg count low in acute cyathastominosis)

Front 46

Back 46

Fasciola hepatica

(2.5 - 3.5 cm long and 1 cm wide)

Front 47

what is making this liver unhappy

Back 47

Ascaris suum

(milk spots in pig livers)

Front 48

what is making this sheep liver unhappy

Back 48

Fasciola hepatica

(acute fasciolosis, acute occurs in sheep only)

Front 49

In horse

Back 49

Cyathastomins

(encysted larvae that can reactivate simultaneously)

Front 50

Back 50

Miracidium

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

Front 51

Back 51

Fascioloides magna

(adult up to 8 cm long - yuck)

Front 52

Back 52

Dicrocoelium dendriticum

(adult is < 1 cm long)

Front 53

this egg is 160 um by 95 up

Back 53

Fascioloides magna

(larger egg than Fasciola hepatica but otherwise similar)

Front 54

Back 54

Oxyuris equi

(hang out in large intestine)

Front 55

Back 55

Fasciola hepatica

(chronic fasciolosis)

Front 56

what is making this cow liver unhappy

Back 56

Fascioloides magna

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

Front 57

Back 57

Oxyuris equi

(laid in skin of perianal region)

Front 58

Back 58

Metacercaria of Fasciola spp.

(found on vegetation and eaten by definitive host)

Front 59

Back 59

Cercaria of Fasciola spp.

(develop into metacercaria in the environment)

Front 60

Back 60

Oxyuris equi

(horse rubs off skin flakes with eggs into environment)

Front 61

what is making this horse intestine unhappy

Back 61

Strongylus vulgaris larvae

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

Front 62

Back 62

Paraphistomum

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

Front 63

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

Back 63

Dicrocoelium dendriticum

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

Front 64

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

Back 64

Fasciola hepatica

(arrow is pointing to the operculum)

Front 65

Back 65

Dicrocoelium dendriticum

(requires a zinc sulphate flotation)

Front 66

Two different species

Back 66

a) Paramphistomum (look like Fasciola but clearer)

b) Fasciola

Front 67

What is making this sheep liver unhappy

Back 67

Fasciola hepatica

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

Front 68

three species of abomasal nematodes based on size

Back 68

left - Haemonchus

middle - Ostertagia

right - trichostrongylus

Front 69

what is making this abomasum unhappy

Back 69

Ostertagia ostertagi

(hyperplasia of the abomasal mucosa)