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How many units of RBCs are required to raise the hematocrit of a 70kg man from 21% to 30%? 

A flat, colorless colony is isolated on MacConkey from a stool specimen. The isolate has an Alkaline/Acid reaction on TSI with gas and abundant H2S production.  The citrate utilization test, ornithine and lysine decarboxylation tests, and methyl red tests are all positive.  The laboratory scientist should report:

Which immunoglobulins can initiate the alternate pathway of the complement system although this pathway is usually antibody independent?

Which immunoglobulins can initiate the alternate pathway of the complement system although this pathway is usually antibody independent?

A hospitalized patient is experiencing increased neuromuscular irritability (tetany).  Which of the following tests should be ordered immediately?

Approximately how many random ABO compatible donors would need to be screened to find 3 units of compatible blood for a patient with anti-S and anti-Jkb? Antigen Frequency: S+ 55%; Jk(b+) 73%

A deficiency of Vitamin D correlates with which condition?

A cloudy CSF sample grew short gram-positive rods and exhibited a narrow zone of beta hemolysis on sheep blood agar. The organism is catalase positive, hydrolyzes esculin, and demonstrates motility. Identify the genus of this organism:

Hemoglobin A2 is composed of the following globin chains:

A flat, colorless colony is isolated on MacConkey from a stool specimen. The isolate has an Alkaline/Acid reaction on TSI with gas and abundant H2S production.  The citrate utilization test, ornithine and lysine decarboxylation tests, and methyl red tests are all positive.  The laboratory scientist should report: