ASCP ASCP Certifications ASCP-MLT Questions & Answers

• Question 461:

  A zone of inhibition is the area around an antibiotic-infused paper disk that does not show any bacterial growth. The antibiotic impregnated on the disk will diffuse into the agar in the area surrounding the disk. If the bacteria are sensitive to the antibiotic, they cannot grow near the disk. The size of the zone is proportional to how sensitive the organism is. If the organism is resistant to the antibiotic, it will grow very closely to the disk.

  The size of the zone of suppressed growth on a sensitivity plate using sensitivity disks is referred to as the zone of:

  A. beta hemolysis

  B. alpha hemolysis

  C. gamma hemolysis

  D. inhibition

  E. susceptibility

  Correct Answer: D

• Question 462:

  The beta hemoglobin chain loci are found on which chromosome?

  A. Chromosome 11

  B. Chromosome 16

  Correct Answer: A

• Question 463:

  "Universal donor", (a misnomer) is usually applied to group O, Rh negative blood. Although it may be necessary to use group O, Rh negative blood in an extreme emergency, it is preferable to use type specific blood for emergencies. In an extreme emergency , if the ABO and Rh type are unknown which of the following should be given to the patient?

  A. Group O, Rh positive blood

  B. Group AB, Rh negative blood

  C. Group O, Rh negative blood

  D. Any blood type is OK

  Correct Answer: C

• Question 464:

  Enterobius vermicularis infection occurs through swallowing ova. Pinworm infections including those caused by Enterobius vermicularis, usually occur due to a fecal-oral route of transmission. According to the CDC, "Eggs are deposited on perianal folds. Self- infection occurs by transferring infective eggs to the mouth with hands that have scratched the perianal area. Person-to-person transmission can also occur through handling of contaminated clothes or bed linens. Enterobiasis may also be acquired through surfaces in the environment that are contaminated with pinworm eggs (e.g. , curtains, carpeting). Some small number of eggs may become airborne and inhaled. These would be swallowed and follow the same development as ingested eggs. Following ingestion of infective eggs, the larvae hatch in the small intestine and the adults establish themselves in the colon. The time interval from ingestion of infective eggs to oviposition by the adult females is about one month. The life span of the adults is about two months. Gravid females migrate nocturnally outside the anus and oviposit while crawling on the skin of the perianal area. The larvae contained inside the eggs develop (the eggs become infective) in 4 to 6 hours under optimal conditions . Retroinfection, or the migration of newly hatched larvae from the anal skin back into the rectum, may occur but the frequency with which this happens is unknown."

  Enterobius vermicularis infection occurs through:

  A. penetration of larvae through skin

  B. penetration of adult through skin an resulting production of larvae

  C. ingesting or inhaling ova

  D. ingesting a segment of the adult worm

  Correct Answer: C

• Question 465:

  Entamoeba gingivalis resembles Entamoeba histolytica both in size and in nuclear characteristics. Entamoeba gingivalis may contain numerous cytoplasmic inclusions such as red blood cells, white blood cells, and bacteria.

  

  I reside in the mouth where I measure approximately 17 micro meters.

  A. Entamoeba coli trophozoite

  B. Entamoeba gingivalis trophozoite

  C. Acanthamoeba species trophozoite

  D. Trichomonas vaginalis trophozoite

  Correct Answer: B

• Question 466:

  Convert the following temperature from Celsius to Fahrenheit 20 degrees C Question options:

  A. 77 degrees F

  B. 14 degrees F

  C. 68 degrees F

  D. 39.2 degrees F

  Correct Answer: C

• Question 467:

  Lipids tend to form a "maltese cross" pattern when viewed in polarized light, which helps to differentiate them from other urine microscopic components. Substances found in urinary sediment that are more easily distinguished by use of polarized microscope are:

  A. WBC

  B. RBC

  C. Casts

  D. Lipids

  E. Crystals

  Correct Answer: D

• Question 468:

  Convert the following temperature from Fahrenheit to Celsius 102 degrees F

  A. 38.9 degrees C

  B. 14 degrees C

  C. 77 degrees C

  D. 39.2 degrees C

  Correct Answer: A

• Question 469:

  Molarity x Molecular Weight x Volume = Grams Molecular Weight (aka Formula Weight) = 2(1) + 32 + 4(16) = 98 So, 4 x 98 x 0.2L = 78.4g What weight of H2SO4 is contained in 200 ml of a 4 molar H2SO4 solution? (Atomic weight: H= 1; S = 32; 0 = 16)

  A. 78.4 gm

  B. 156.8 gm

  C. 39.2 gm

  D. 15.68 gm

  E. 84 gm

  Correct Answer: A

• Question 470:

  The conidia of Exophiala species are produced within phialides that extrude the conidia in tight, ball-like clusters.

  The large, drum stick-shaped muriform macroconidia of Alternaria species are arranged in short chains; the small, elliptical conidia of Cladosporium species are arranged in both long and short, branching chains.

  Which of the following dematiaceous fungal species produce conidia in clusters?

  A. Alternaria species

  B. Exophiala species

  C. Cladosporium species

  Correct Answer: B