Draschia megastroma/ Habronema spp/ Habronema majus Flashcards Preview

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Flashcards in Draschia megastroma/ Habronema spp/ Habronema majus Deck (22):
1

class

nematoda

2

order

spirurida

3

hosts

all horse species

4

what kind of nematode is this?

stomach nematode

5

size of D. megastoma adult

13mm

6

what kind of buccal cavity fo Draschia megatoma have?

funnel shaped buccal cavity

7

What is the size of Harbronema spp?

22-25mm

8

what kind of buccal cavity do the harbronema spp. have?

cylindrical buccal cavity

9

are these parasites eggs thin or thick shelled?

thin

10

is the life cycle direct or indirect?

indirect

11

what is the intermediate host for Draschia megatoma and Habronema muscae

musca domestica

12

what is the intermediate host for the habronema majus?

musca spp, stomoxys calcitrans

13

what animal is the intermediate host for all these species?

flies

14

what is the site of infection

adults and larvae in stomach
L3 also in skin

15

pathogenesis

larvae: cutaneous habronemiasis and cutaneous drashiasis, conjunctivitis

adults: nodules in stomach

16

clinical signs

larvae: "summer sores"
adults: gastritis

17

diagnosis

recovering of eggs in feces, difficult
larvae in skin scraping

18

treatment

MCL's, fly control

19

identification of eggs

thin shelled and larvated (paperclip) eggs
eggs collapse in feces

20

size of eggs

40-55 x 8-16 micrometers

21

what is the infective stage?

L3 larvae- inside of fly. fly can deposit larvae on host or the fly may be eaten by the host

22

life cycle is synchronized with ____

flies