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This RBC index is most useful for differentiating iron deficiency anemia from thalassemia trait when MCV is low.
What is the RDW?
This analyte is increased in both acute pancreatitis and chronic alcoholism but is more specific when paired with lipase.
What is amylase?
This gram-negative diplococcus ferments glucose but not maltose and is a common cause of bacterial meningitis in young adults.
What is Neisseria meningitidis?
This antibody is most commonly responsible for severe hemolytic disease of the fetus and newborn.
What is anti-D?
Dysmorphic RBCs in urine most strongly suggest bleeding from this anatomical location.
What is the glomerulus?
A patient with prolonged PT, normal aPTT, and correction on mixing study most likely has a deficiency of this factor.
What is Factor VII?
In diabetic ketoacidosis, this ketone body predominates in serum but is not detected by routine urine dipsticks.
What is Ξ²-hydroxybutyrate?
This organism is oxidase-positive, non-fermenting, produces a blue-green pigment, and is commonly associated with burn infections.
What is Pseudomonas aeruginosa?
A positive DAT with a negative antibody screen most strongly suggests this condition.
What is autoimmune hemolytic anemia?
This urine crystal is classically associated with ethylene glycol poisoning.
What are calcium oxalate crystals?
This cytochemical stain is positive in acute myelogenous leukemia but negative in acute lymphoblastic leukemia.
What is myeloperoxidase (MPO)?
A decreased anion gap is most commonly associated with an increase in this plasma protein.
What is albumin loss or increased paraproteins (e.g., multiple myeloma)?
This pathogen requires buffered charcoal yeast extract (BCYE) agar for growth.
What is Legionella pneumophila?
This enhancement medium increases antibody uptake by reducing zeta potential.
What is LISS?
A positive nitrite test depends on the presence of this type of organism.
What are nitrate-reducing gram-negative bacteria?
Markedly elevated LDH, indirect bilirubin, and reticulocytosis with a negative Coombs test suggest this mechanism of anemia.
What is non-immune hemolysis?
This enzyme is most specific for cholestasis when elevated disproportionately to AST and ALT.
What is alkaline phosphatase (ALP)?
This organism is acid-fast, slow-growing, and commonly identified using niacin accumulation testing.
What is Mycobacterium tuberculosis?
A patient lacking the Kell antigen who forms anti-K is at risk for this transfusion reaction type.
What is delayed hemolytic transfusion reaction?
This CSF finding is most consistent with bacterial meningitis.
What is elevated neutrophils with decreased glucose?
A platelet count of 45 Γ10βΉ/L with normal morphology and no bleeding symptoms in a young adult most strongly suggests this condition.
What is immune thrombocytopenic purpura (ITP)?
A patient with chronic kidney disease has normal total calcium but exhibits symptoms of hypocalcemia. This discrepancy is best explained by decreased levels of this plasma protein.
What is albumin?
This laboratory finding is most consistent with respiratory acidosis with metabolic compensation.
What is increased pCOβ with increased HCOββ»?
This antibody reacts optimally at cold temperatures and is usually clinically insignificant unless reactive at 37Β°C.
What is anti-M (or other cold-reactive IgM antibody)?
This fluid analysis parameter differentiates transudates from exudates.
What is protein concentration (Lightβs criteria)?