Brainscape's Knowledge GenomeTM

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


See full index

Parasitology > Pig nematodes > Flashcards

Pig nematodes Flashcards

1
Q

What are nematodes of indoor + outdoor pigs?

A

*Ascaris suum
*Strongyloides ransomi
*Trichuris suis
*Oesophagostomum spp.

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

What are nematodes of outdoor pigs only?

A

*Hyostrongylus rubidus
*Metastrongylus apri

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

What are characteristics of Ascaris suum?

A

*Ascarid = L2 infective stage
*Large fleshy white worms
*Direct life cycle
*Highly resistant eggs - thick walled 70um
*Infections = strong immunity

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

What is the life cycle of Ascaris suum?

A

*Eggs passed in faeces
*Develop on ground - temp dependent - 4 weeks
*Paratenic host - earthworm / dung beetles
*Hepato-tracheal / pulmonary migration - larvae from liver to lungs
*Coughed up + swallowed develop to L4/L5 in SI
*PPP = 8weeks

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

What is seen with Ascaris suum infection?

A

*Liver - fibrous reaction = ‘milk spot’
*Lungs = transient pneumonia
*Adults in SI = poor weight gain + mechanical blockage

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

How is Ascaris suum diagnosed?

A

*Post mortem - milk spot liver
*Transient resp disease
*Reduced weight gain
* MgSO4 Egg flotation method

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

What is the treatment + control of Ascaris suum?

A

*Anthelmintics - MLs + BZs
*Non-anthelmintics = steam cleaning indoor pens

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

What animals does Strongyloides ransomi affect?

A

*Young animals - good immunity after exposure

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

What are characteristics of Strongyloides ransomi?

A

*Small - 6mm
*Hair-like
*No ovijectors
*Small eggs - 40-50um , thin shelled + embryonated

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

What is the unique life cycle of strongyloides?

A

*Free living + parasitic cycle
*Free living = L3 develop develop t L4 + L5 = free living males + females in environment

*Parasitic life cycle = L3 ingested / percutaneous infection + migrate through body to udders / SI where they develop to FEMALE adults - asexual lifecycle (Parthogenesis)
*PPP = <15days
*Can be passed to piglets in milk as arrested larvae in udder

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

What are the clinical signs of strongyloides infection?

A

*Adults = strong immunity = no CS
*Piglets = diarrhoea, anaemia, emaciation
+ death if <2week old

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

How is strongyloides infection diagnosed?

A

*Eggs in faeces from anus so not confused with free living stage - patent infection
*Abattoir reports - adults in intestinal mucosa + Baermann of minced tissues

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

What is the treatment + control of strongyloides?

A

*Anthelmintics - MLs + BZs
*Keep environment clean

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

What are characteristics of Trichuris suis?

A

*Whip worm
*Found in LI
*Highly resistant eggs - viable for 11years (2mucoid plugs)
*Direct lifecycle

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

What is the lifecycle of trichuris?

A

*Eggs develop >16oC - 10-12weeks
*Infective stage = egg containing L1
*PPP = 6-8weeks

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

What does trichuris cause in pigs?

A

*Weight loss
*Colitis in growers
*Resilient to many anthelmintics

17
Q

What are characteristics of oesophagostomum?

A

*Found in LI
*Adults = 2cm + cephalic vesicle
*Direct + typical strongyle lifecycle
*PPP 3-6weeks

18
Q

What does oesophagostomum cause?

A

*Nodules - intestinal wall = thickened + necrotic
*Higher prevalence in older pigs

19
Q

How is oesophagostomum diagnosed?

A

*Post mortem = nodules
*Faecal exam - larval culture - differentiate from hyostrongylus

20
Q

What is the treatment + control of oesophagostomum?

A

*BZs + MLs
*Good sanitation

21
Q

What does Hyostrongylus rubidus cause?

A

*Direct life cycle - found in gastric glands of stomach
*Parasitic gastritis
*Heavy infections = inappetance, anaemia, weight loss
Thin sow syndrome

22
Q

How is Hyostrongylus rubidus diagnosed?

A

*Faecal exam - larval culture
*Post mortem

23
Q

What is the treatment of hyostrongylus rubidus?

A

*BZs + MLs

24
Q

What is the life cycle of Metastongylus apri?

A

*L1 infects earthworm - develop to L3 (can survive in earthworm for 7 year)
*Earthworm ingested by pig
*L3 released into gut - L3+ L4 in mesenteric lymph node
*L4 migrates to lung via lymphatics + blood
*Matures in lungs - Lumen of bronchi
*2.5-5cm
*PPP = 3-4weeks

25
Q

What does Metastrongylus apri cause in pigs?

A

*Seen in 4-7month old pigs
*Catarrhal + eosinophilic bronchiolitis
Persistent cough, dyspnoea + nasal discharge
*Reduced appetite + weight gain
*Exacerbates other resp diseases

26
Q

How is metastrongylus apri diagnosed?

A

*Adults visible in bronchi
*Faecal exam + baermann technique

27
Q

What is the treatment + control of metastrongylus apri?

A

*MLs + BZs
*Minimising contact with intermediate host

Parasitology (25 decks)

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