Q&A GRADED A+
◉ Which bacteria is H2S negative? Answer: salmonella paratyphi A
◉ Which bacteria are H2S positive? Answer: salmonella typhi
citrobacter spp.
proteus spp.
◉ Which statement is correct regarding clinitest? Answer: it is used to
detect glucose, galactose, and other reducing sugars
◉ How does free to total PSA ratio show the risk of prostate cancer?
Answer: The higher the ratio, the lesser the risk
◉ Stomatocytes are seen in what clinical condition? Answer: liver
disease
◉ Burr cells are seen in which of the following conditions? Answer:
uremia
,◉ Reactive monocytosis is seen in which condition? Answer:
Tuberculosis
◉ Gram negative bacteria, normally seen in the oropharyngeal tract of
mammals, they are involved in the pathogenesis of some animal bite
wounds as well as periodontal diseases. This bacteria exhibits gliding
motility:. Answer: capnocytophaga
◉ If Hgb=12 and Hct=36%, calculate MCHC. Answer: 33
MCHC=Hgb/Hct x 100
◉ Acidic urine specimens are frequently seen in... Answer: High protein
diet
◉ A 7 year old boy showed up in a hospital ER with dark colored urine.
The dip stick shows a large amount of blood and moderate protein. 14
days ago he had a sore throat and fever. A throat swab is cultured and
returns positive for group A beta hemolytic strep. A urine culture will
most likely be:. Answer: Negative
◉ Anti-A 4
Anti-B 4
A-cells 2
B-cells 2
,What would you do next? Answer: Incubate reagents and specimen at
RT for 15-30 minutes and repeat the test
◉ A blue-top was drawn on a walk-in patient, PT>14s and PTT>36s
1:1 mixing study does not correct the results and there is no heparin
contamination. What test would you do next? Answer: dRVVT
An inhibitor is suspected. dRVVT can be used for detection of lupus
anticoagulant
◉ What does caffeine benzonate do in Hendrassik-Grof method for
measuring bilirubin? Answer: Acts as an accelerator
◉ What factor is deficient in Hemophilia A? Answer: Factor VIII
◉ What factor is deficient in Hemophilia B? Answer: IX (9)
AKA Christmas disease
◉ How do you calculate coefficient of variation? Answer: (standard
deviation/ mean) X 100
◉ 17-Ketosteroids is produced in the. Answer: Adrenal glands
◉ What is the formula for sensitivity? Answer: TP / (TP + FN) x 100
, ◉ What condition causes the ESR to decrease? Answer: vibration of the
desk
◉ Poisioning with moth balls may show which of the following red cell
characteristics? Answer: Heinz bodies
◉ Which of the following differentiates S. maltophilia from other non-
fermenter gram negative rods? Answer: Oxidase negative; DNase
positive
◉ A 3 year old's urine shows 25 renal tubular epithelial cells under high
objective, granular casts, 3-5 WBC and nitrite is negative. Answer:
Acute tubular necrosis
◉ Which carbohydrate is often used in the media plates to differentiate
S. aureus from other Staphylococcus spp. such as S. epidermidis?
Answer: Mannitol
◉ What urine test can help diagnose pheochromocytoma? Answer:
methanephrines
◉ What test is used to identify Hairy cell Leukemia? Answer: TRAP
Tartrate resistant acid phosphotase