Lecture 3: Nematodes (part 2) Flashcards Preview

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Flashcards in Lecture 3: Nematodes (part 2) Deck (34):
1

eyeworm

thelazia californensis

2

where is thelazia californensis found

conjunctiva and tear ducts (dogs, cats, sheep, deer, humans)

3

L1 of thelazia are ingested by what host

face fly, they molt into L3 (infective) in fly

4

tx thelazia

remove parasites from eye
ivermectin
difficult to control face fly (musca)

5

giant kindey worm

dioctophyme renale

6

DH for dioctophyme renale

right kidney
main DH is MINK
dogs, wolves, foxes...rarely cats, humans, pigs, cattle

7

IH for dioctophyme renale

annelid, lives on surface of crayfish

possible paratenic hosts include fish and frogs

8

urinary bladder worm

pearsonema
p. plica (dogs)
p. feliscati (cats)

genus formerly known as Capillaria

9

paratenic host of pearsonema

earthworms

10

pearsonema egg

biopolar plugs; similar looking to tricharis (whips) and eucoleus (lungworms)

11

infective stage of pearsonema

L1 encysted in earthworm

12

eucoleus lungworms

eucoleus
e. aerophilus (dogs, cats)
e. boehmi (dogs)

13

where in the host are eucoleus lungworms found

eucoleus aerophilus is found in the RESIPRATORY TRACT

E. boehmi is found in NASAL CAVITY (more common in hunting dogs)

14

eucoleus life cycle

direct

15

difference between the eggs of eucoleus aerophilus vs. e. boehmi

aerophilus is netted
boehmi is pitted
when focusing in and out

16

infective stage of eucoleus

egg with L2 larvae

17

usually asymptomatic, but with severe infections with eucoleus CS include

coughing!

bronchitis, pneumonia, dypsnea, etc.

18

dx eucoleus

fecal exam or BAL

19

How are the similar looking eggs of trichuris (whips) vs. pearsonema (UB worm) vs. eucoleus (lungworm) differentiated on fecal

trichuris (whips) : largest, very dark brown, smooth shell, symmetrical and prominent plugs, polar rings

20

filaroides lungworms

filaroides
f. hirthi
f. osleri

21

where is filaroides hirthi located

lung parenchyma

22

where is filaroides osleri located

bifrucation OF TRACHEA

23

L1 has a kinky tail and LACKS a dorsal spine. Which similar larvae has a dorsal spine

filaroides lungworm

aelurostrongylus (feline lungworm)

24

tracheal nodules

filaroides osleri

25

often misdiagnosed as kennel cough

filaroides

26

feline lungworm

aelurostrongyllus abstrusus

27

IH of aelurostrongyllus abstrusus

terrestrial snails and slugs

paratenic hosts: rodents, birds, amphibians, reptiles

28

L1 have kinky tail with dorsal spine

aelurostongylus abstrusus

29

rat lungworm

angiostrongylus cantonensis

30

hosts for angiostrongylus (rat lungworm)

DH: rats in heart/pulm arteries

IH: snails/slugs

incidental hosts: humans, primates, other

paratenic hosts crustaceans and amphibians

31

eosinophylic pleocytosis in CSF, bilateral HL and tail paresis, eospinophilia, otherneurological signs

canine neural angiostrongylosis (from rate lung worm)

32

dx angiostrongylosis

CSF ELISA, hard to pick up

33

guinea worm of dogs or serpent on the stick

dracunculus insignis

found in subcutaneous tissues of dogs, cats, and wildlife

34

how does a pet get dracunculus insignis

ingesting L3 infected copepod (IH) or frog (PH)

female will make a blister in SC skin, burst with water contact to release L1