Brainscape's Knowledge GenomeTM

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


See full index

Parasitology > Nematodes- Helminths (trichostrongyles) > Flashcards

Nematodes- Helminths (trichostrongyles) Flashcards

1
Q

What stage of larvae is infective

A

L3

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

What happens after L3 enter the wall of abomasum

A

turn into L4

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

What can they do to stay alive during poor conditions

A

go dormant
Hypobiosis
less susceptible to anthelmintics
L4 stage

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

What is PGE

A

parasitic gastroenteritis

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

Clinical signs of PGE in cattle

A

Diarrhea
bottle jaw
rough hair coat
weight loss

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

diagnosis of PGE

A

clinical signs
High fecal egg counts
Moroccan leather
necropsy

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

Prevention of PGE

A

move to a worm-free pasture

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

What are characteristics of Ostertagia ostertagi

A

most pathogenic in cows
Developing larvae in gastric glands
modest anemia
Bankrupt worm

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

Pathogenesis of ostertagi

A

Destroy gastric glands- ruptures tight junctions
Damages HCL producing cells
pH goes neutral
Bacterial overgrowth

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

Epidemiology of ostertagiasis

A

L3 live up to 1 year on pasture in the north
Southern US they live longer
3 types of ostertagiasis

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

Characteristics of Type 1 ostertagiasis

A

North: late summer/autumn
South: late winter/spring
Large numbers of larvae acquired from pasture

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

What causes damage by Type one ostertagiasis

A

Exodus of gastric glands

Moroccan leather

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

What is the diagnosis of Type 1 Ostertagiasis

A

High egg counts

Incremental to rapid onset of clinical signs

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

Characteristics of pre type 2 ostertagiasis

A

L3 go into hypobiosis once in gastric glands
Hypobiosis may last 4-7 months
no clinical disease…until they erupt from larvae

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

Type 2 ostertagiasis

A

Mid to late adverse season

usually in yearlings and old

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

Diagnosis of Type 2 ostertagiosis

A

History, clinical signs of rapid onset of severe PGE in a few animals
Variable egg counts

17
Q

What is the scientific name of barberpole worm

A

Haemonchus contortus

18
Q

What are some general characteristics of contortus

A

Vary pathogenic blood sucker

Major cause of PGE in small ruminates

19
Q

Why is H. Contortus so bad

A 
Transmission year round
Sheep and goats acquire little or no immunity 
Sucks a lot of blood
Lay a lot of eggs
Drug resistant
20
Q

What are thee sources of peripartuient rise in barberpole worm

A

Hypobiotic larvae resuming development
ingestion of overwinter larvae
Increased egg output from an adult population

21
Q

What are management principles of barber-pole worm

A

Do not use anti-parasitic drugs in replacement of good management and sanitation

22
Q

What are the two main parasites of trichostrongyles

A

Haemonchus (barberpole)

Ostertagia (Bankrupt)

Parasitology (21 decks)

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