Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Parasitology > Nematodes VI: Strongyloides > Flashcards

Nematodes VI: Strongyloides Flashcards

1
Q

What do the Strongyloides free living stages (L1 and L2) have?

A

Rhabditiform esophagus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What makes up the rhabditiform esophagus?

A

Bulb
Isthmus
Corpus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe the heterogonic life cycle

A 
Free living life cycle
L1 in eggs passed in feces
L1 and L2 in feces
Filariform larvae (L3) in contaminated soil
Free-living male and female adults
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe the homogonic life cycle

A

Filariform larvae (L3) are in contaminated soil and penetrate skin
—Infective L3 larvae
Parthogenesis
—parasitic females only (parasitic males do not exist)
—Clones of eggs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the percutaneous transmission route?

A

L3s penetrate skin –> circulatory –> lymphatic systems –> lungs –> alveoli –> migrate or coughed up and swallowed –> mature in SI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the peroral transmission route?

A

Penetrate oral mucosa and migrate as they do in percutaneous OR
Ingest infective L3; go directly to SI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the host of ransomi?

A

Swine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the route of infection for ransomi? What is the PPP for each?

A

Percutaneous* (7-10)
Peroral (7-10)
Transmammary** (4)
Transplacental (4)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe the percutaneous or peroral Strongyloides ransomi transmission route

A

Filariform larvae

Tracheal migration to maturation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe somatic migration of Strongyloides ransomi

A

Accumulate as arrested larvae

—Adipose tissues, especially mammary tissues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Where do mature gilts store Strongyloides ransomi larvae?

A

Adipose tissues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where do mature gilts shed Strongyloides ransomi larvae?

A

Colostrum and milk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the key to epidemiology in swine with Strogyloides ransomi?

A

Transmammary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is necessary to diminish larval development as well as multiplication of free-living generations of Strongyloide ransomi?

A

A high level of hygiene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the host of Strongyloides westeri?

A

Equids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the route of infection for Strongyloides weteri? What is the PPP of each?

A

Percutaneous (7-10)
Peroral (7-10)
Transmammary** (4)

17
Q

What is the most important route of transmission for Strongyloides westeri?

A

Transmammary

18
Q

When do foals shed Strongyloides westeri eggs?

A

10 to 14 days after birth

19
Q

What are clinical signs of Strongyloides westeri?

A

Diarrhea (foal-heat)

20
Q

What is the zoonotic potential of Strongyloides westeri?

A

Creeping eruption

—Allergic response to free-living L3 in humans

21
Q

What is the host of Strogyloides papillosus?

A

Ruminants

22
Q

What is the route of infection for Strongyloides papillosus? What is the PPP for each?

A

Percutaneous: primary route for sheep/goats (7-10)
Transmammary: primary route for cattle (6)

23
Q

What is the technique of choice for diagnosing Strongyloides ransomi, westeri, and papillosus?

A

Fecal flotation

24
Q

What are the adults of Strongyloides ransomi, westeri, and papillosus like?

A

Small (3-10 mm)
Embedded in SI mucosa
Generally need skin scraping of mucosa

25
Q

How can you control Strongyloides ransomi, westeri, and papillosus?

A

Maintain clean, dry envrionment

26
Q

What is the host of Strongyloides stercoralis?

A

Canids

27
Q

What is the route of infection for Strongyloide stercoralis? What is the PPP?

A

Percutaneous (7-10)

28
Q

Describe autoinfection with Strongyloides stercoralis

A

Rare
Tends to happen only if bitch is infected while lactating
Hyperinfection, or uncontrolled autoinfection is also rare

29
Q

What are the different Strongyloides stercoralis third stage larvae?

A

Auto-infective third stage larvae (L3a)

Infective third stage larvae (L3i)

30
Q

Describe L3a

A

Develop within intestine of dog

Invade dog through wall of large intestine

31
Q

Describe L3i

A

Develop in environment

Invade dog through skin

32
Q

How can you diagnose Strongyloide stercoralis?

A

L3a in lung of host
Blood filling alveolar space
L1 in feces of infected host
Technique of choice: Baermann

33
Q

How can you diagnose Strongyloides sterocoralis adults?

A 
Mucosal scraping
Parasitic female (long esophagus)
34
Q

What king of problem does strongyloides stercoralis tend to be?

A

Kennel problem

—Summer with hot/humid weather

35
Q

What is the zoonotic potential of Stronglyoides stercoralis?

A

Cutaneous larva migrans

36
Q

How can you control Strongyloides stercoralis?

A

Maintain clean, dry environment

37
Q

What is the host of Strongyloides tumefaciens?

A

Felids

38
Q

What is the route of infections for Strongyloides tumefaciens?

A

Percutaneous and Peroral

Life cycle is unknown

39
Q

What is the clinical sign for Strongyloides tumefaciens?

A

Grossly visible tumor-like nodules in large intestine

Parasitology (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions