Nematodes Flashcards
True/False: Nematodes will only ever reproduce sexually
True
Describe the basic life cycle of Nematodes:
Egg to L1 to L2 to L3 to L4 to adult
True/False: Nematodes are always non-migratory
False- nematodes can be either migratory or non-migratory in their life cycles
What location are strongyloides normally found within the host?
Found in the small intestine and the caecum within poultry
What is unique about the life cycle of the strongyloides?
Alternate between a parasitic and a free living stage in their life cycles
Name the genus that this egg is derived from:
Stronyloides
Are the eggs from the order Rhabdita normally embryonated or unembroyonated?
Normally embryonated
What is the colliqual names for trichostrongylus and haemonchus species?
Black scour worm
What is a distinguishing features of the trichostrongylus species?
A prominent excretory pore
What site does the black scour worm normally occupy?
Small intestine
What are some symptoms that are generally associated with the black scours worm?
Black scours
Name the species that is shown below:
Trichostrongylus
Name the species that is shown below:
Trichostrongylus
What species is typically infected with hamonchus and what site does it occupy?
Ruminants are normally infected with this parasite and it normally occupies the small intestine
What is a symptom associated with haemonchus?
Heavy and rapid weight loss occurs
Name the species that is shown below:
Haemonchus
Name the parasite that is pictured below:
Ostertagia
Name the parasite that is pictured below:
Cooperia
Name a unique feature concerning the life cycle of the nematodirus worm:
life cycle developement to L3 stage occurs within the egg
Name the parasite shown in the picture below:
Nematodirus species
What is the main host of the ancylostoma canininum parasite?
The dog
What is the site of the ancylostoma caninum?
small intestine
What is the life cycle of the ancylostoma caninum parasite?
Follow the basic life cycle of the nematoda, it can be transmitted transmarilary at L3 stage, the L3 stage normally migrates to the muslce in L3 stage to return to the small intestien by stage L4. Paratenic hosts can be involved.
Name the parasite that is pictured below:
ancylostoma caninum
What is the host of the species found in superfamily: strongyloidea, family: strongylidae?
horses and donkeys
What site do the strongyles of horses occupy?
caecum and the colon
What is a unique feauture of the life cycle of the strongyles of horses?
extensive tissue migration occurs
What is the host of the chabertia ovina?
ruminants and pigs
What site does the chabertia ovina occupy?
caecum and colon
What is a unique feature of the life cycle of chabertia ovina?
migration to the tissue mucosa occurs.
What is the name of the parasite pictured below?
Chaberta ovina
What is the host of the parasite stephanurus dentatus?
pig
What site does stephanurus dentatus occupy?
kidney and the perirenal tissues
What is the life cycle of stephanurus dentatus?
Ingested as L3 in the gut, then migrates to the liver as L4 then becomes an adult in the kidney
Name the parasite that is shown below:
Stephanurus dentatus
Name a nematode that occupies the trachea of poultry:
Syngamus trachea
What is the host of metastrongylus species?
the pig
What site does the metastrongylus parasite occupy?
Bronchi and bronchioles
What is the intermediate host that is involved in the cycle of the metastrongylus?
earthworm
Name the parasite shown below:
Metastrongylus
What is the host of the parasite toxocara canis?
the dog
What site does toxocara canis occupy?
small intestine
Name some unique features of the life cycle of the toxocara canis parasite:
- complex/paratenic hosts
- somatic/tracheal migration
- prenatal/perinatal infection
Name the species from which the following eggs came from:
Toxocara canis
What is the host of ascaris suum?
pig
What site does ascaris suum occupy?
small intestine
What is the life cycle involved in ascaris suum?
- direct
- somatic migration (pre-patent period of about 2 months)
Name the parasite that is pictured below:
Ascaris Suum
What is the host of aniskas?
toothed whale
What is the site occupiedby aniskas?
stomach
What is the life cycle that is involved in aniskas?
- indirect
- krill
- intermediate host
Can humans become infected by eating fish that are infected with the aniskas parasite?
Yes
What is the host of ascardida galli
chicken
What is the site of ascaridia galli?
small intestine
What is the host of oxyuris equi?
horses and donkeys
What site does Oxyuris equi occupy?
caecum, colon, rectum
Name the parasite that is pictured below:
Oxyuris Equi
What is the main host of habronema and draschia?
horses and donkeys
What site to habronema and draschia occupy?
stomach
What is the intermediate host that is involved in the life cycle of habronema and draschia?
Muscid fly
Name the parasite pictured in the images below:
Habronema/Draschia
What is the host of the parasite Spirocerca Lupi?
dogs
What is the site of the parasite Spirocerca lupi?
oesphagus and the stomach
What vector is involved in the life of spircerca lupi?
beetle
Name the parasite that is shown below:
Spirocerca lupi
What is the host of the parasite dirofiliria immitis?
dogs (cats and humans)
What is the site of dirofiliria immits?
cardiovascular system
What is the name of the vector involved as an intermediate host of the dirofiliria life cycle?
mosquitio
What is the host of trichenella spiralis?
most mammals
What is the site of trichenella spiralis?
small intestine (but larve stage is able to remain within the muscle for very long periods of time)
Briefly describe the life cycle that is invovled in the trichenella spiralis life cycle:
- direct life cycle
- no free living stage
- encapsulated L1 long lived within the muscle
Name the parasite that is shown below:
Trichenella Spiralis
What is the host of the trichurus species?
mammals
What is the site of the trichurus species?
large intestine
What species does this egg come from?
Trichuris
