A pre-analytical error can be introduced by:

A laboratory has just undergone an accreditation inspection in which peers from an out-of-state facility performed the inspection.  Their focus was on both compliance with regulations as well as education.  Which of the following is the organization that performed the inspection?

This antigen marker is an indicator of viral replication and high infectivity in a HBV infection.

If 0.25mL of sample is diluted to make a total volume of 20 mL, what is the resulting dilution?

A 4-year old boy patient was seen by his primary physician after two days of severe diarrhea.  Stool cultures were ordered and three consecutive samples contained significant blood and mucus.  During the history and physical it was noted the family had eaten at a fast food restaurant three days prior and mom threw her hamburger away because it was too undercooked for her to eat, but she did not think to check with her son who ate his entire hamburger Stool culture results:XLD agar = yellow coloniesHE agar = orange coloniesMAC agar = dark pinkSMAC = few dark pink colonies, many clear to very faint pink colonies Based on these results, what is the most likely organism?

Which of the following is correct regarding the gauge of a needle?

If the total bilirubin is 3.1 mg/dL (53.0 μmol/L or mmol/L) and the conjugated bilirubin is 2.0 mg/dL (34.2 μmol/L), the unconjugated bilirubin is:

How much 95% alcohol is required to prepare 5L of a 70% alcohol solution?

Which disease may be expected to show a single IgM spike on an electrophoretic pattern?

Pulsed field gel electrophoresis has been performed on two isolates of Escherichia coli that have been isolated from the blood of newborns in the same neonatal unit. The banding pattern of the two isolates differed by two bands. Which of the following is the correct interpretation of these results?