W6 Nematodes Strongyloides and Trichostrongyloidea-I

1

The relevant genus's of order Rhabditida include

1

The important orders of phylum Nematoda include

1

The following image is a parasite of order Rhabditida. Identify the following features of the worm: Corpus, Isthmus, Bulb

Corpus

Isthmus

Bulb

1

Match the following spicules with their correct species of Trichostrongylus species.

T. colubriformis

T. vitrinus

T. rugatus

T. axei

Barb-like tip

Dissimilar and unequal

Tapering end

Thick and dissimilar

1

These spicules belong to which species of Trichostrongylus and how would you describe their morphology?

5

The life cycle of Trichostrongylus involves a host stage, a stage, and a pasture stage. Dung containing worm eggs is passed from the sheep onto the pasture. At this stage eggs develop through L1 and L2 stages to the L3 stage. The L3 stage is known as the stage. Generally development to the infective stage is markedly reduced at temperatures below and above . During the pasture phase the L3 larvae migrate into where they wriggle, some onto pasture, where they will then be consumed by the host. During the pasture phase the of L2 is retained by and acts to protect it from harsh conditions in the environment. After the L3 larvae is consumed it is in the . Infective larvae become adult that live for many months within the sheep's gut to reproduce and lay eggs. The minimum time from L3 to egg laying is days.

1

Name the strongyloid species that affect the mammalian hosts below. For example S. stercoalis is a strongyloid of dogs, cats and humans.
Ruminants =
Pigs =
Horses =
Cat =
= S. fuelleborni

1

The parasitic strongyloides are all found in the stomach, with the exception of the kangaroo species which can be found in the small intestines.

1

Which of the following statements is false regarding the lifecycle of S. papillosus?

1

Ivermectin and Oxibendazole are appropriate treatments for Strongyloides.

1

Which of the following techniques can be used to diagnose a strongyloid infection

1

This is the eggs of , the strongyloid of the .

1

This larva is the larvae , it was found in colostrum. These are the strongyloides of the .

1

The Trichostrongyles of ruminants are

1

Trichostrongyles of ruminants that are found in the include;
"Black scour worm" =
"Wire worm" =
"Thin-necked intestinal worm" =

1

Trichostrongylus species can cause the signs seen in this image.

1

What are the most important nematode of sheep in south-east Australia?

1

What are the main pathogenic affects of Trychostrongylus?

1

Winter Rainfall Zones:
- ( summer too hot and dry, winter too cold or dry, winters too cold, summer too wet )
- ( autumn moist, larvae develop, larvae only develop in spring )
- ( winter moist, grass short, winter dry, grass short, winter dry, grass long, winter moist, grass long )
- ( spring “flush” dilutes larvae, spring "flush" increased number of larva )
- rising temperatures shorten survival time

Summer Rainfall Zones
- ( winter too cold or dry, summer too hot or too wet )
- ( larvae develop in spring, larvae develop in summer, larvae develop in winter, larvae develop in autumn )
- ( maximum numbers in summer, maximum numbers in spring )
Northern Hemisphere (temperate)
- ( winters too cold, autumn too dry, spring too wet )
- ( development occurs in spring, development occurs only in summer, development occurs only in autumn )
- ( reaches maximum in autumn, reaches maximum in summer, reaches maximum in spring )

Masters Degree (Nematodes) Parasitology Test sobre W6 Nematodes Strongyloides and Trichostrongyloidea-I, creado por Emma Gray el 12/04/2016.

W6 Nematodes Strongyloides and Trichostrongyloidea-I

W6 Nematodes Strongyloides and Trichostrongyloidea-I

The relevant genus's of order Rhabditida include

The important orders of phylum Nematoda include

The following image is a parasite of order Rhabditida. Identify the following features of the worm: Corpus, Isthmus, Bulb

Match the following spicules with their correct species of Trichostrongylus species.

These spicules belong to which species of Trichostrongylus and how would you describe their morphology?

Name the strongyloid species that affect the mammalian hosts below. For example S. stercoalis is a strongyloid of dogs, cats and humans. Ruminants = Pigs = Horses = Cat = = S. fuelleborni

The parasitic strongyloides are all found in the stomach, with the exception of the kangaroo species which can be found in the small intestines.

Which of the following statements is false regarding the lifecycle of S. papillosus?

Ivermectin and Oxibendazole are appropriate treatments for Strongyloides.

Which of the following techniques can be used to diagnose a strongyloid infection

This is the eggs of , the strongyloid of the .

This larva is the larvae , it was found in colostrum. These are the strongyloides of the .

The Trichostrongyles of ruminants are

Trichostrongyles of ruminants that are found in the include; "Black scour worm" = "Wire worm" = "Thin-necked intestinal worm" =

Trichostrongylus species can cause the signs seen in this image.

What are the most important nematode of sheep in south-east Australia?

What are the main pathogenic affects of Trychostrongylus?

Name the strongyloid species that affect the mammalian hosts below. For example S. stercoalis is a strongyloid of dogs, cats and humans.
Ruminants =
Pigs =
Horses =
Cat =
= S. fuelleborni

Trichostrongyles of ruminants that are found in the include;
"Black scour worm" =
"Wire worm" =
"Thin-necked intestinal worm" =