LATG Chapter 15 Diagnostic Techniques
questions with answers.
Diagnosis ANS -is the determination of the nature and cause of a disease, injury, or congenital defect
Prognosis ANS -is a forecast of the probable course and outcome of a disease
Parasitology ANS -is the study of organisms that live on or in another organism and draw nourishment
from their host
Types of Parasites ANS -ectoparasites and endoparasites
Where are adult endoparasites most commonly found? ANS -in the intestinal tract
Dirofilaria immitis ANS -canine heartworm
Where do the adult canine heartworms reside? ANS -in the pulmonary artery and right ventricle of the
heart
where does larvae canine heartworms reside? ANS -in the bloodstream
What can ticks transmit from their bite? ANS -Rickettsia
First evaluation procedure to perform on an animal suspected of having an ectoparasite infestation
ANS -gross visual examination
Proglottids ANS -body sections of a tapeworm
, How to perform a fecal smear ANS -mix a very small amount of feces with a drop of saline on a clean
glass microscope slide and cover it with a coverslip
Fecal direct Smear ANS -the quickest method for identifying endoparasites but least accurate because
the sample size is so small
Ways to detect endoparasites in feces ANS -fecal direct smear
fecal flotation
fecal sedimentation
Fecal Flotation ANS -a larger fecal specimen is collected which is mixed with a solution in a centrifuge
tube that is filled to the top with the solution. parasite eggs are buoyant and rise to the top of the tube
separating from the fecal debris. a clean coverslip is briefly place on top of the tube so that it touches
the meniscus which is then transferred to a clean glass microscope slide
What endoparasites cant a fecal flotation detect? ANS -flukes or lungworms
Most useful technique for diagnosing flukes or lungworms ANS -fecal sedimentation
Baermann technique ANS -useful for detecting lungworm larvae
How to perform a fecal sedimentation test ANS -a fecal sample is placed in a strainer or wrapped in
cheesecloth and immersed in lukewarm water inside a funnel
How does the funnel in fecal sedimentation help detect nematode larvae ANS -the funnel has a
stopcock at its bottom. the nematode larvae are unable to swim against gravity, so they fall through the
water to the bottom of the funnel. the stopcock is opened to collect a small volume of water containing
the larvae, and this is examined with a microscope
Pinworm Detection ANS -1. clear cellophane tape pressed to an animals perianal area
2. a more sensitive test is PCR
3. examination of the intestinal contents during necropsy
questions with answers.
Diagnosis ANS -is the determination of the nature and cause of a disease, injury, or congenital defect
Prognosis ANS -is a forecast of the probable course and outcome of a disease
Parasitology ANS -is the study of organisms that live on or in another organism and draw nourishment
from their host
Types of Parasites ANS -ectoparasites and endoparasites
Where are adult endoparasites most commonly found? ANS -in the intestinal tract
Dirofilaria immitis ANS -canine heartworm
Where do the adult canine heartworms reside? ANS -in the pulmonary artery and right ventricle of the
heart
where does larvae canine heartworms reside? ANS -in the bloodstream
What can ticks transmit from their bite? ANS -Rickettsia
First evaluation procedure to perform on an animal suspected of having an ectoparasite infestation
ANS -gross visual examination
Proglottids ANS -body sections of a tapeworm
, How to perform a fecal smear ANS -mix a very small amount of feces with a drop of saline on a clean
glass microscope slide and cover it with a coverslip
Fecal direct Smear ANS -the quickest method for identifying endoparasites but least accurate because
the sample size is so small
Ways to detect endoparasites in feces ANS -fecal direct smear
fecal flotation
fecal sedimentation
Fecal Flotation ANS -a larger fecal specimen is collected which is mixed with a solution in a centrifuge
tube that is filled to the top with the solution. parasite eggs are buoyant and rise to the top of the tube
separating from the fecal debris. a clean coverslip is briefly place on top of the tube so that it touches
the meniscus which is then transferred to a clean glass microscope slide
What endoparasites cant a fecal flotation detect? ANS -flukes or lungworms
Most useful technique for diagnosing flukes or lungworms ANS -fecal sedimentation
Baermann technique ANS -useful for detecting lungworm larvae
How to perform a fecal sedimentation test ANS -a fecal sample is placed in a strainer or wrapped in
cheesecloth and immersed in lukewarm water inside a funnel
How does the funnel in fecal sedimentation help detect nematode larvae ANS -the funnel has a
stopcock at its bottom. the nematode larvae are unable to swim against gravity, so they fall through the
water to the bottom of the funnel. the stopcock is opened to collect a small volume of water containing
the larvae, and this is examined with a microscope
Pinworm Detection ANS -1. clear cellophane tape pressed to an animals perianal area
2. a more sensitive test is PCR
3. examination of the intestinal contents during necropsy
