strongyloides westeri

Question 1

order

Answer 1

rhabditida

Question 2

common name

Answer 2

threadworm

Question 3

host

Answer 3

all horses

Question 4

identification

Answer 4

hair like nematodes

long esophagus- 1/3rd of body

Question 5

size

Answer 5

less than 1cm

Question 6

eggs

Answer 6

thin shelled larvated eggs

Question 7

egg size

Answer 7

30-40 micrometers

Question 8

is life cycle direct or indirect?

Answer 8

direct

Question 9

life cycle has a _____ and _____ phase

Answer 9

parasitic(homogonic), free living(heterogonic)

Question 10

homogonic life cycle

Answer 10

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

Question 11

when environmental conditions are not favorable _____ cycle predominates

Answer 11

homogonic

Question 12

what is the infective stage?

Answer 12

L3

Question 13

when conditions are favorable ____ cycle predominates

Answer 13

heterogonic

Question 14

heterogonic life cycle

Answer 14

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

Question 15

_____ and ____ modes of transmission also occur

Answer 15

prenatal, transmammary

Question 16

site of infection

Answer 16

small intestine

Question 17

pathogenesis

Answer 17

erythematous- skin redness

Question 18

clinical signs

Answer 18

larvae: cause uticaria
adults: diarrhea

Question 19

diagnosis

Answer 19

fecal flotations reveals eggs

Question 20

treatment

Answer 20

incorporated with control of strongyles and ascarids

Question 21

life cycle can be _____, ______ or ______

Answer 21

per os, percutaneous, or transmammary