(19) Ascarids

Question 1

THREE LIPS

Answer 1

Question 2

(Ascaris Suum)

1. aka?
2. location in body?
3. worldwide distribution
4. eggs pass in feces
5. what is affective stage?
6. in utero transmission?
7. paratenic hosts?
8. how stable are eggs?

Answer 2

1. swine roundworm
2. SI, stomach, bile duct, liver
3. L2 in egg (this is exception)
4. no
5. earthworms, rodents (not very good)
6. very resistant (infective stage is larva in egg)

Question 3

(Ascaris Suum)

(Pathogensis)

(Liver)

1. large numbers get scarring hemorrhage –> larvae destroyed with fibrotic response –> ?

(Lung)

1. get petechial hemorrhages - may lead to what?

accompanied by what?

(intestine)

little path here

2. may migrate to where?

THERE IS AN IMPACT ON PRODUCTIVITY

(Resistance)

3. is there resistance?

Answer 3

1. intersitial hepatic fibrosis (seen on surface, referred to as milk spots)
2. pneumonia (vermious)

asthmatic cough (thumps)

(if severe may lead to edema/emphysema)

2. bile duct
3. yes - after 1st exposure (resitantce caues milk spots)

Question 4

(Ascaris Suum)

1. Where can we break life cycle?
2. treatment?
3. How long do eggs last in envrinoment?

Answer 4

1. remove from host/environment
2. endectocides (ivermectin, doramectin, moxidectin)

benzimidazoles (fenbendazole)

3. FOREVER

Question 5

(Parascaris Equorum)

1. Hosts?
2. location in body?
3. ww, common in MN
4. what kind of transmission?
5. can they get immunity?
6. path

cause what in foals?

problems with large #s in SI

7. strategic deworming how?
8. treatment?

Answer 5

1. horses, donkeys, mules, zebra

common in young suckling and weanling foals

2. SI
3. horizontal between foals

eggs are very resistant

5. yes - with exposure
6. summer colds (as larvae migrate throught the lungs)
7. foals at 6-8 weks - then 8 wk intervals until 1 yrs old
8. most anthelmintis are efficacious (fenbendazole, ivermectin, moxidectin, oxfendazole, oxibendzole, pyrantel)

Question 6

(Toxocara (neoascaris) Vitulorum)

1. large roundworm of what?
2. hosts?
3. location in body?
4. not in US, in FLORIDA
5. path
6. treatment?

Answer 6

1. cattle
2. cattle, water buffalo

common in calves

3. SI
4. mortality and morbidity
5. none in US

Question 7

(Ascaridia Galli)

1. roundworm of what?
2. found in what?
3. common throughout US
4. path

most severe in what?

5. Diagnosis - large, thick shelled egg - may get into egg! surprise!
6. treament?

Answer 7

1. poultry
2. ducks, geese, chickens and turkeys
3. young
4. piperazine

fenbendazole and ivermectin (with approval)

Question 8

1. path?
2. treatment?

Answer 8

1. very little
2. levamisole, fenbendazole, ivermectin