Helminthology Flashcards
(62 cards)
1
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Moniezia expnasa
2
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Diphyllobothrium latum - Broad or fish tapeworm
- One set of genitalia
- genital openings are on the middle line of proglottids
3
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Dipylidium caninum - flea or cucumber tapeworm
- anapolytic: can move in feces and push eggs out
4
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Moniezia expansa
- triangular shape
- 6 hooked oncoshophere is central
5
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Lancet fluke egg
- detected by flotation
- with two eye-like excretory cells of the miracidium inside.
- the egg is hard-shelled
6
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Liver fluke: big lesions
Lancet fluke: smaller lesions
7
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2nd larval form: sporocyst, produces redia
- develops in the body of the snail
8
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Moniezia benedeni
- quadrangular eggs
- 6 hooked oncoshaera is eccentric
9
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Liver: big lesions: T. tenuicollis.
Small lesions: pisiformis / echinococcus
10
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Strobilocercus fasciolaris
- with seperated bladders
- in liver of rodents
only taenia that can infect cats
11
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Egg of rumen fluke
- unembryonated egg. collected from fresh feces
- the eccentric zygote is surrounded by coarse yolk granules
12
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primary biotope for intermediate host snail of liver fluke
13
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Liver fluke adult, hemorrhages
14
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Cysticercus longicollus
- short neck
- predilection site: body cavity of rodents
15
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Lancet fluke adult
- food source: absorbs nutrients from bile
- two larger testicles and the smaller ovary are behind the ventral sucker while yolk glands are lined up on both sides of the worm
16
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Egg of liver fluke
- non-embryonated egg. observed in fresh feces.
- the eccentric zygote is surronded by a finely granulated yolk
17
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Liver fluke with blood inside
18
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Blood fluke, egg
19
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Cercaria of Fasciola hepatica
- develops inside the body of a redia
- after rain the cercaria swarm out of the snail and swim to find a solid surface.
- cercariae attaches to vegetation, shed their tail and encyst as metacercariae (the infective stage)
20
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Egg of anoplocephala
21
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Anoplocephala
22
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Cercaria of blood fluke
23
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Schematic drawing of T.multiceps
24
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Galba truncatula with metacercariae around
25
Liver fluke. food source: blood
26
Heart, can be Su or Bo
- Cysticercus cellulosa or c. bovis
27
Hemorrhages on liver due to larval migration (similar to liver fluke)
28
C. pisiformis
29
Taenia type egg (thick wall)
30
Small rodent: foamy cyst/bladders, connected to eachother
--\> E. multicolaris
31
E. hydatisus
32
Cirrhosis, hemorrhages
33
C. tenuicollis
34
Echinococcus granulosus
- 3 segments, adult
- Larvae: e. hydatidosus
- armed scolex with 4 suckers and hooked rostrellum
- one set of genitalia
- E. granulosus predilection site of larvae:
* most parenchymal organs and bone marrow
* Liver: in cattle, pig, horse, humans
* Lungs: in sheep and goat
35
Miracidium: free-living, wants to infect snails
- developed from zygote containing eggs in water usually within 2 weeks
- larva hatches and swims in water to find and penetrate into a freshwater snail
36
Formica spp., ant
secondary intermediate host of lancet flukes
37
Liver surface
- C. pisiformis
38
Liver fluke egg: aber/goldish with operculum
39
small: lancet fluke
Big: liver fluke
40
Adult tapeworms
41
Hemorrhages, liver fluke
42
C. tenuicollis/C. pisiformis
- differntiate based on size
43
Brain
- T. muticeps
44
Cysticercus
45
soil mites with cysticercoid inside the body cavity
46
Rumen fluke cross section
* Paramphistomum (I.H: planorbids - freshwater snails)
* Calicophoron (I.H: Galba truncatula
- It has eggs and not intestine containing blood
- Morphology: Bean like, reddish worms having a sucker on the oral end and another bigger on the opposite end
- Similar lifecycle as liver fluke. except Juvenile fluke never leave the intestinal canal.
- Definite host:
* Cattle: C. daubneyi
* Sheep and goat: P. cervi
47
secondary biotope for liver flukes
- main source of heavy fasciolosis
48
Rumen fluke cross-section
* Paramphistomum (I.H: planorbids - freshwater snails)
* Calicophoron (I.H: Galba truncatula
- Morphology: Bean like, reddish worms having a sucker on the oral end and another bigger on the opposite end
- Similar lifecycle as liver fluke. except Juvenile fluke never leave the intestinal canal.
- Definite host:
* Cattle: C. daubneyi
* Sheep and goat: P. cervi
49
Rumen fluke
* Paramphistomum (I.H: planorbids - freshwater snails)
* Calicophoron (I.H: Galba truncatula
- Morphology: Bean like, reddish worms having a sucker on the oral end and another bigger on the opposite end
- Similar lifecycle as liver fluke. except Juvenile fluke never leave the intestinal canal.
- Definite host:
* Cattle: C. daubneyi
* Sheep and goat: P. cervi
50
adult blood fluke (male big, female small)
51
Lancet Fluke in liver
* Dicrocoelium dendriticum
* lives in hyperthrophic biliary ducts of the liver.
* I.H: 1st: small landsnails. 2nd: formica genus
- Life cycle:
* adult worms produce eggs, shed in the feces, contains miracidium
* egg eaten by landsnail -\> miracidum hatches
* Larva hatches in the intestine of snail and develops into sporocyst
* the sporocyst produces more generations of daughter-sporocysts
* inside the sporocyst, cercaria develops by asexual budding (padeogenesis). Cercaria hava long tail and a stylet on the head.
* Cercariae leave the snail by its expelled mucous
* the ants ingest the mucos and then they get infected with the larval lancet fluke
* after penetration of the intestine the larvae turn into metacercaria
* reach the ganglion of the ants -\> modify their behaviour
* grazing animals ingest the ants
* encapsulated metacercariae gets out of their own capsule in the small intstine of the final host and turn into juvnile flukes
* emerging juvenile flukes reach the liver through the biliary ducts and then develops into adults.
52
Evaginated cycticercus
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Adult rumen fluke in rumen
* Paramphistomum (I.H: planorbids - freshwater snails)
* Calicophoron (I.H: Galba truncatula
- Similar lifecycle as liver fluke. except Juvenile fluke never leave the intestinal canal.
- Definite host:
* Cattle: C. daubneyi
* Sheep and goat: P. cervi
54
skeletal muscle
C.ovis/c.cervi
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Rumen fluke cross-section
* Paramphistomum (I.H: planorbids - freshwater snails)
* Calicophoron (I.H: Galba truncatula
- Morphology: Bean like, reddish worms having a sucker on the oral end and another bigger on the opposite end
- Similar lifecycle as liver fluke. except Juvenile fluke never leave the intestinal canal.
- Definite host:
* Cattle: C. daubneyi
* Sheep and goat: P. cervi
56
tapeworm egg w oncoshphere
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The scolex of a Taenia species usually have strong hooks on the rostrellum.
two suckers
58
Redia
- the third larval form, develops by asexual budding in the sporocyst
- redia has amouth and a blind sac of intestine and actively consume the tissue of the snail host.
- after some time the cercariae (4th larval stage) develops inside the body of redia
59
E. multicolaris (alveolaris)
60
Gall bladder: adult liver fluke
## Footnote
- Life cycle:
61
Diplydium caninum - flea or cucumber tapeworm
- 2 sets of genitalia
- genital openings on both sides of the longitudinally narrow proglittids
62
Hydatid cyst, E.graulosus (thick wall)
