Q.12 Examples of informatics and technology that are used in clinical practice include all of these except:

You collected a sample of saliva from a patient with a bacterial respiratory infection. You decided to perform a set of serial dilutions on the saliva sample and grow them on Petrifilms in order to enuemerate the amount of bacteria in the patient’s saliva. You plated 1 mL of each of several of the dilutions and incubated them at 37 degrees C for 48 hours. After incubation, you observed the following results: Dilution Factor Colony Forming Units 10^-4 TNTC 10^-5 288 10^-6 25 10^-7 12 10^-8 2 What is the most reliably-calculated concentration of the patient’s original saliva sample in CFU/mL?

Q.18 A staff nurse on a medical-surgical floor is reviewing the latest evidence-based guidelines for preventing surgical site infections (SSIs). The nurse knows that the strongest level of evidence to support the effectiveness of a specific hand-hygiene protocol comes from which type of study? 

Infants with diarrhea should be weighed with the diaper on to prevent transmission of potentially infectious material.

Listed in the graph below is a series of optical density readings taken during the log phase of a bacterial culture. Using the formula given, calculate the generation time (in hours) of the bacteria between hour 2 and hour 4. Round your answer to 2 decimal places. GT = ((t2-t1)*log(2)) / (log(OD2) – log(OD1)) Hour O.D.600 1 0.12 2 0.25 3 0.31 4 0.45 5 0.53  

Water quality is often gauged through the presence of coliform bacteria. Which of the following accurately describes key characteristics of coliforms?

Q.25  A nurse manager is implementing a quality improvement (QI) project aimed at reducing the incidence of catheter-associated urinary tract infections (CAUTIs) on the medical unit. The manager understands that a successful QI program must incorporate several key principles. Which of the following nurse actions best demonstrates the principle of focusing on teamwork in this QI initiative? 

Q.21 What is the most important time window to administer tPA for an ischemic stroke?

You grew a known bacterial species on DNase agar. After incubating for 48 hours, you find many bacterial colonies growing on the DNase agar. Additionally, the agar remained green, the same as it was before incubation.  The known bacteria produces DNase enzyme(s). True or false?

Updated clinical guidelines for the diagnosis and management of otitis include all of the following except: