Blog

Whooping cough is diagnosed by:

If a TSI that should be K/A is read to early, how would it appear? Why?

After 24 hrs. incubation, a BE appears black and 6.5% NaCl appears clear. The MLT should report:

A culture is inoculated onto a BAP, MAC and HEK. After 24 hrs. of incubation the following results are observed:BAP: one organism = moist, large gray colony second organism = creamy, large white colony MAC: one pink, moist organism HEK: one orange organism with a black dot in the center Which of the following reports would be correct based on these observations?

A patient has blood cultures ordered. They are found to be positive and, after testing, the organism is identified as Streptococcus bovis. Select the correct statement concerning this patient:

JEMBEC is used to:

A urethral discharge specimen is received in the laboratory. The patient is a male, 24 yr. The courier logs in the specimen at 1:30 AM. A direct smear is performed immediately and the MLT reports “gram negative intracellular diplococci present.” The MLT has two STAT chemistries, so she places the specimen in the refrigerator until she has time to setup the culture, which is not STAT. At 2:53 AM the technician removes the specimen and inoculates to BAP, Chocolate & MTM. After 24 hrs. of incubation, there is no growth on any of the plates. At 48 hr of incubation, there is no growth on any of the plates. The technician reports “no growth at 48 hrs.” and finalizes the culture report. The next day the technician is reprimanded by the Laboratory Manager. Why?  (EXPLAIN YOUR REASONING)  

Observe the oxidase test and give the result. Name an organism that could give this result.

Select the pair of organisms which would provide appropriate positive and negative controls for the CAMP test:

A joint fluid is received in the lab and inoculated to BAP, MAC, Chocolate and thio. After 24 hrs. of incubation the thio is cloudy, the BAP and MAC have no growth and the chocolate has a gray/tan wet colony. The gram stain shows gram negative diplococci. Select the true statement: