strongyloides westeri Flashcards Preview

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Flashcards in strongyloides westeri Deck (21):
1

order

rhabditida

2

common name

threadworm

3

host

all horses

4

identification

hair like nematodes
long esophagus- 1/3rd of body

5

size

less than 1cm

6

eggs

thin shelled larvated eggs

7

egg size

30-40 micrometers

8

is life cycle direct or indirect?

direct

9

life cycle has a _____ and _____ phase

parasitic(homogonic), free living(heterogonic)

10

homogonic life cycle

egg contains L1 is passes in feces
in soil L1 develops to L3
L3 penetrates hosts skin
migrates to the trachea, is swallowed and goes to the small intestine
develop to adult females and parthenogenesis takes place

11

when environmental conditions are not favorable _____ cycle predominates

homogonic

12

what is the infective stage?

L3

13

when conditions are favorable ____ cycle predominates

heterogonic

14

heterogonic life cycle

free living larva hatch and develop in soil to adult male and females
females lay eggs, develop to L3
L3 infect percutaneously or per os

15

_____ and ____ modes of transmission also occur

prenatal, transmammary

16

site of infection

small intestine

17

pathogenesis

erythematous- skin redness

18

clinical signs

larvae: cause uticaria
adults: diarrhea

19

diagnosis

fecal flotations reveals eggs

20

treatment

incorporated with control of strongyles and ascarids

21

life cycle can be _____, ______ or ______

per os, percutaneous, or transmammary