Flashcards in More animal procedures lab Deck (49):
What does increased MCV in an anemic animal suggest?
Name a breed of dog that may have increased MCV without being anemic.
Which are consistently seen with hemangiosarcoma (HSA) of the liver in dogs?
acanthocytes and schistocytes
Increased variation in the size of RBCs on a blood film is called?
What best fits this description: small, irregularly shaped RBC fragment caused by mechanical trauma while in circulation within the vasculature
What doesn't describe a spherocyte?
they can be identified in most domestic species
List platelet artifacts caused by EDTA.
On average, how many PLTs per OIF are considered adequate?
T/F The mean platelet volume is the average size of PLTs in the circulating PLT population.
List things seen on a smear with regenerative anemia.
polychromatahpils, anemia, howell-jolly bodies, nRBC, metarubricytes, basophillic stippling
What is a shift platelet?
immature platelet, size of RBC or bigger
Where is heartworm usually?
in the pulmonary arteries
What are examples of an elisa test?
idexx snap 3dx, snap 4 dx, dirocheck, cite heartworm test kits
What are examples of a lateral flow immunoassay test?
vetscan canine rapid heartworm test, synbiotics witness heartworm antigen test, heska solo step ch
How are the knotss test and antigen test different?
knotts is a concentration test for microfilaria and antigen is for the presence of adult heartworm
Acanthochelionema reconditum is what kind of filarid nematode?
What is an occult infection?
harbors adult heartworms but will not have mff circulating in the peripheral blood
Compare & contrast canine and feline heartworm.
dogs: can be infected with many heartworm, likely to be antigen positive because of the presence of female heartworms, antibodies usually not helpful in the diagnosis, the heart and lungs are involved in this disease.
cats: usually infected with few heartworms, unlikely to be antigen positive because of few worms(few female worms), antibodies may be helpful in the diagnosis, the heart is not usually involved in disease (the lungs are severely infected)
What's the difference between aggregate and punctate reticulocytes in cats?
agg: type 1 polychromatophils
punc: type 2 more mature (older) do not stain as polychromataphils with Wright's type stains
T/F Punctate reticulocytes are unique to cats and the majority of the reticulocytes in cats are punctate.
T/F Punctate reticulocytes are less reliable than aggregate reticulocytes as indicators of the current demand for RBCs.
T/F Both aggregate and punctate reticulocytes should be counted in cats with mild anemia.
What does the FeLV/FIV SNAP test detect specifically?
FeLV p27 antigen and specific antibodies to FIV
Small, usually singular and round, basophillic nuclear remnants in the RBC cytoplasm
Multiple, small, dark blue, dot-like structures representing residual RNA in the RBC cytoplasm
A knob-like structure protruding from the RBC membrane or a small, pale, refractile spot in the RBC cytoplasm composed of denatured, precipitated Hb that is often attached to the inner cell membrane.
T/F Because feline Hb is very susceptible to oxidation and cat spleens are inefiicent in removing heinz bodies from RBCs, up to 5% of the RBCs in healthy cats may contain howell-jolly bodies(erythrocyte refractile bodies or ER bodies)
Which test is for qualitative detection of D. immitis in canine whole blood, serum, or plasma?
VetScan Canine Heartworm Rapid test
What doe the Canine Heartworm SNAP 3Dx test for?
D. immits antigen, antibody to B. burgorferi, and antibody to E. canis
Canine heartworm is a what?
T/F Aberrant migration occurs more often in aberrant hosts (cats) than in canines.
How is A. reconditum transmitted?
T/F A. reconditium is not pathogenic in dogs but produces microfilariae in the peripheral blood that must be differentiated from those of D. immits.
What detects movement of mff in a drop of blood?
T/F D. immitis typically coil in place while those of A. reconditium glide off across the slide, however this may not always be reliable.
When using a microhermatocrit tube where can the mff be present?
within the plasma column just above the buffy coat
T/F A direct smear and microhermatocrit tube detech movement of mff and can distinguish between mff of d. immitis and other filarid species.
false-they can't distinguish them
T/F If mff are present, they may be seen on a stained blood film, in the monolayer of a smear.
What is the word for a dog with occult heartworm infection?
T/F occult heartworm testing is performed most often using enzyme-linked immunosorbent assay (elisa) kits.
Detects the patient's antibody response to the adult heartworm and to larvae, detects exposure to heartworms
detects the presence of D. immitis antigen (Ag) in the patient's blood.
What is Ag?
a glycoprotein associated with fully mature female canine heartworms
What tests can be used to differentiate between D. immitis and A. reconditum? What else can they detect?
heartworm antibody and antigen test and mff of other species of filarid nematodes and occult heartworm infection
What tests are considered the most reliable?
T/F Infected cats often do not have detectable antigen.
The causative agent of Lyme disease has been identified has been identified as the tick-borne _____
spirochete Borrelia burgdorferi
Canine ehrilichiosis is a tick-borne disease of dogs caused by the _______
rickettsial parasite E. canis