MLS Comprehensive Final Exam Study Guide | Questions with 100% Correct Answers | Verified | 21 Pages

A 28-year-old female presents with lower back pain and dysuria. A urine culture grows 78,000 CFU/mL of a pink, flat colony-type on a MacConkey agar. Biochemical results are as follows: 0 Oxidase + ONPG + Lysine decarboxylase + Ornithine decarboxylase 0 Citrate utilization 0 H2S production 0 Urease 0 Phenylalinine deaminase + Indole 0 Voges-Proskauer Identification: Escherichia coli The Kirby-Bauer disk diffusion test reveals susceptibitilty to all antimicrobials in a routine gram-negative battery of agents. Interpretation of these data indicate - all data are correct and correlate well A 44 year old male needs 3 units of packed red cells for back surgery. The patient's cells fail to react with Anti - A and Anti - B; his plasma reacts with A, B, and O cells. The next logical step to resolve this problem is - identify the antibody(ies) using a panel of Group O cells A bubble of room air is trapped in the pO2 and pCO2 measuring chambers of a blood gas instrument. A sample assayed while these bubbles are present can produce falsely - increased pO2 and decreased pCO2 results