Microbiology
The name of the enzyme produced by some bacterial organisms that can inactivate beta-lactam antimicrobial agents.
What is beta lactamase?
In a Wright stain peripheral blood smear, this red blood cell shape has an area of central pallor that is elongated in a mouth-like shape.
What is a stomatocyte?
These are marked and calibrated to deliver one volume of a specified liquid.
What are volumetric pipettes?
90% of copper found in circulation is bound to this transport protein.
What is ceruloplasmin?
An organism isolated from the surface of a skin burn is found to produce a diffusible green pigment on the blood agar plate. Further testing should identify this organism as:
What is Pseudomonas aeruginosa?
The MCHC is an example of this type of measurement on an automated blood cell counter. The WBC count is the opposite type.
What is an indirect measurement?
This cytokine activity is the most important innate defense mechanism against viral infections.
What are type I interferons?
A 13S Westgard rule violation indicates this QC error has occurred.
What is one measurement that exceeds 3 SD either below or above the mean?
Mycobacterium spp. require acid fast staining for visualization due to this substance in their cell wall?
What is mycolic acid?
An athlete just finished working out. Exercise causes the oxygen-dissociation curve to shift this direction.
What is to the right?
This is a variation in antibodies that are within the variable regions.
What is an idiotype?
A patient with congestive heart failure will present with this type of BUN/Creatinine ratio?
What is increased or pre-renal azotemia?
A blood culture bottle Gram stain demonstrates a Gram-negative bacilli that resembles “gull-wings.” Blood from the bottle is subcultured to BAP and CHOC media and incubated at 37ᵒC. After 24 hours, both media demonstrate no growth. This organism is most likely.
What is Campylobacter jejuni?
Autoagglutination of red cells at room temperature can cause these CBC RBC parameters to be falsely elevated.
What are the MCV, MCHC, and MCH?
Composed of two protein chains: an alpha and a beta chain. They help recognize peptide antigen presented by MHC molecules.
What is a T cell receptor (TCR)?
This specifically is the cause of type 1 diabetes mellitus.
What is autoimmune destruction of the beta cells in the islets of Langerhans?
An organism gave the following reactions: TSI A/A, Lysine decarboxylase positive, indole positive, VP negative, urea negative, citrate negative, motility positive. This is the most likely identification of this organism.
What is E. coli?
Hemolytic disease of the newborn is a syndrome in which the newborn becomes anemic from the destruction of his/her red blood cells in utero. This RBC destruction is a result of maternal IgG antibodies formed against RBC antigen. This RBC antigen is most commonly associated with HDN.
What is the Rh antigen?
The number of true positives divided by the number of true positives plus false negatives. Also, defined as the proportion of people who have a specific disease or condition and have a positive result.
What is diagnostic sensitivity?
A patient who is in respiratory acidosis will compensate for this state in which manner?
What is renal conservation of bicarbonate?