Lecture 15 - Respiratory Parasitology Flashcards
what respiratory parasites are pasture-borne
dictyocaulus species
match the dictyocaulus species to its host
a. viviparus
b. arenfieldi
c. filaria
- equine spp.
- sheep, goats
- cattle
a. 3
b. 1
c. 2
describe the pathology of dictyocaulus spp.
blocked airways caused by bronchial inflammation and worms
verminous pneumonia caused by aspiration of eggs, larvae, & exudate
T/F: anthelminthic treatments are effective for dictyocaulus
TRUE
what dewormers are preferred for dictyocaulus spp.
macrocyclic lactones
Describe cattle immunity to D. viviparus
host immune rxn stimulates an acquired immunity over continued exposure in endemic areas
what is the timeline of clinical signs and immunity for D. viviparus
clinical signs begin 1 week after acquisition and worsen until week 5, when acquired immunity takes effect
what is a management strategy of D. arnfieldi
do not co-graze donkeys (asym. carriers) with horses
what is the pathology of D. filaria
many cases are asymp. but heavy infections cause verminous bronchitis, c+, dyspnea
what two dictyocaulus spp. should you deworm at the 1st clinical sign
D. viviparus and D. arnfieldi
what is referred to as gapeworm? what species does this infect?
syngamus trachea - poultry
why is syngamus trachea referred to as gapeworm (what is the pathology?)
trachea becomes blocked by worms and inflamed from exudate causing respiratory distress (mouth breathing)
what is the paratenic host for syngamus trachea
earthworms, snails, slugs
what nematode affects PASTURED swine
metastrongylus spp.
what two nematodes require earthworms as a type of intermediate host
- syngamus trachea
- metastrongylus spp.
what is the pathology of metastrongylus spp. include clinical signs
worms and inflammatory exudate block airways and lead to secondary infection, poor weight gain, abdominal breathing (thumps)
describe the eggs of metastrongylus spp.
larvated and thick-shelled
what nematode causes granulomatous pneumonia in cats due to “nests” in the lung parenchyma
Aelurostrongylus
what are the paratenic host and intermediate host of aelurostrongylus
paratenic = rodent or bird
intermediate = slug or snail
give a morphologic description of pathognomonic findings of aelurostrongylus
systemic disseminated granulomatous nodes
describe the baermann analysis
used for motile larvae by filling a tube with water and then collecting the sample
what lung nematode is closely related to capillarids
whipworms
T/F: capillarids tend to be both host and site specific
TRUE
cats with Eucoleus aerophilus infections should be treated with
topical moxidectin
describe the pathology of Eucoleus aerophilus
asymptomatic to mild cough in dogs and cats
describe the pathology of eucoleus boehmi
rhinitis, S+, rubbing nose
what capillaria spp. infects dogs and is common to NC
eucoleus boehmi
what is the fluke of companion animals
paragonimus kellicotti
what is the general life cycle of paragonimus kellicotti
aquatic - intermediate hosts of crayfish and river snails - infect companion animals
T/F: humans CANNOT get paragonimus kellicotti
FALSE - cases reported from eating undercooked crayfish
what is the pathology of paragonimus kellicotti
bronchi inflammation, eosinophilic granulomas, acute pneumothorax and sudden death
what diagnostics should be performed if you suspect P. kellicotti
- fecal sedimentation
- sputum smear
