Exam III - Oesophagostomum spp.

Question 1

what is the common name for Oesophagostomum spp.?

Answer 1

nodular worm; pimpily worm

Question 2

who does Oesophagostomum spp. infect?

Answer 2

species specific

pigs - O. dentatum & O. quadrispinulatum

cattle - O. radiatum & O. columbianum

goat & sheep - O. venulosum

Question 3

Describe the life cycle of Oesophagostomum spp..

Answer 3

ingested L3 arrest in noduals in the sm & lg gut of the host where they molt to L4’s (arrest can be up to 1 year pending favorability of enviromental conditions) –> syncrinized emergence of L4 and mature to adults in the lumen of the lg gut –> eggs laid in high #’s

• maturation of egg –> L3 can take as few as 10days in a favorable enviroment

Question 4

Sows tend to show clinical dz more than other species. what are the CS’s of the pig?

PPR plays a roll in the transmission of the Oesophagostomum spp. in pigs. how does this PPR favor the parasite?

Answer 4

anarexia, wt loss w/ decreased milk production- rarely diarrhea will be seen

PPR favors the parasite because it allows a “easier” transmission to the offspring if PPR occurs when farrowing.

Question 5

what arer the CS’s seen in cattle with Oesophagostomum radiatum?

Answer 5

anarexia & diarrhea

Question 6

T or F

Since Oesophagostomum spp. are moderately immunogenic large #’s accumulate in the older animals.

Answer 6

True

Question 7

larval stages of Oesophagostomum spp. cause _______ in an acute form of the infection that is seldom seen.

The chronic form can cause __________ and is usually seen in adults that have patent adults with larva emerging.

Answer 7

• enteritis caused by larva (NOT patent = No eggs)- hyperplasia and ulcerations are prominent when infection pressure is high
• diarrhea that is from puddy-like to mucopurulent green putrid smelling diarrhea

Question 8

what is the PPP of Oesophagostomum spp.?

what do the eggs look like?

Answer 8

PPP = 3-8wks

typical strongyle egg

Question 9

what is the IH for Oesophagostomum spp.?

Answer 9

gotcha….. No IH host = direct LC.

HAHAHAHAHAHAHAHA!

Sorry

Question 10

When sows have Oesophagostomum spp. & ___________ parasitic infection it is refered to as pore sow syndrome?

Answer 10

Hyostrongylus spp.

Question 11

Transmission of the parasite can be slowed or broken by what means?

Answer 11

improve hygienic condition expecilly the farrowing sow & reduce egg excreation/ clean up after the animal the best you can –> larva tent to have low motility so they can be found around feces and in soil near the feces to be ingested = clean pasture

Question 12

what is used to Dx this in animals?

Answer 12

egg counts; CS’s & +/- necropsy

• keep egg counts with in reason cant kill them all if you try you increase resistance