You are performing a WBC estimate on 40x and come across a cell that looks like a possible nRBC you want to take a closer look at it on 100x.  You place the cell in the center of the field of view on 40x, and then rotate to the 100x (adding immersion oil).  Upon fine focus on 100x, the cell is still in the center of the field of view.  This concept is known as:

The following data are calculated on a series of 20 determinations of an albumin control: mean = 4.5 g/dL, 1 standard deviation = 0.28 g/dL.  If control limits are set at ±2 standard deviations, which of these ranges represents the allowable limits for the albumin control?

Which of the following represents the Henderson-Hasselbalch equation as applied to blood pH?

After receiving a penicillin injection, a patient rapidly develops respiratory distress, vomiting and hives. This reaction is primarily mediated by:

An anaerobically incubated blood agar plate shows colonies surrounded by an inner zone of complete red cell lysis and an outer zone of incomplete cell lysis that gives a discolored appearance. Based on the information given, the presumptive identification of this isolate would be which of the following?

Systemic lupus erythematosus patients often have which of the following?

An isolate on chocolate agar from a patient with epiglottitis was suggestive of Hemophilus species. Additional testing showed that the isolate only required NAD for growth and was nonhemolytic. Based on these results, what is the most likely species?

A urine sample is received in the laboratory with the appropriate custody control form and a request for DOA ( drugs abuse use) screening.  Which test result would be cause for rejecting the sample?

The cell wall of streptococci and enterococci is mainly comprised of which of the following?

A 47-year old female presented to her provider with severe fatigue. She has had a history of microscopic hematuria and oliguria, and in the past couple of weeks her symptoms have gotten worse. The provider ordered a complete UA, BUN, Creatinine, Serum IgA and an eGFR. The following results were obtained. Identify the most probable condition and the most significant results that led to the diagnosis.image015643987d8.jpg