Parascaris equorum Flashcards Preview

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Flashcards in Parascaris equorum Deck (18):
1

order

ascaridida

2

host

all horses

3

size of adults

30cm

4

identification

large white nematodes with 3 lips

5

ascarid egg is ___shelled

thick

6

size of egg?

90 micrometers

7

is life cycle direct or indirect?

direct and per os

8

is there transmammary or transplacental transmission?

no

9

PPP

2.5 months

10

older animals can develop ____ to ascarids

immunity

11

life cycle

L2 is swallowed, hatches in intestine
L2 burrows in wall of small intestine, liver, lungs
L2 develops to L3
L3 migrates to trachea, swallowed and develop to L4 migrate to small intestine
develop to adults, copulate, females lay eggs

12

what is the infective stage?

L2 in egg

13

site of infection

small intestine

14

pathogenesis

perforation, intestinal obstruction, production losses

15

clinical sings

coughing, unthriftiness, pot belly

16

diagnosis

fecal exam reveals eggs

17

treatment

anthelmintics

18

coughing is caused by?

hepatic tracheal migration