An infant in the newborn nursery becomes ill with meningitis. Culture  of the CSF yields small catalase negative, beta-hemolytic colonies on sheep blood agar. The Gram stained organism showed gram-positive cocci. Other tests performed were:                                     Bacitracin disc                     neg                                     Hippurate hydrolysis            pos                                     6.5% NaCl                             neg                                     Bile esculin hydrolysis          neg                                     CAMP test                             pos Which of the following is the most likely identification? 

When processing transaction data for a national retailer, Computer A utilizes an algorithm that processes \(n\) records in ( \(2540n \lg n\) ) time, whereas Computer B employs an algorithm that completes the task in ( \(2n^{2.5}\) ) time. Given that both systems possess identical hardware equipments, briefly explain, without performing explicit calculations, which computer will complete the execution first.

A beta-hemolytic, gram-positive bacillus that is catalase positive, exhibits tumbling motility, and is clinically associated with septic abortion and meningitis is:

The factor(s) that contribute to an organism’s ability to cause disease, include:

A 2-year-old child experienced an upper respiratory infection 2 weeks prior to hospital admission. The patient was seen in the emergency room 3 days prior to admission with a high fever. Physical exam revealed an exudative pharyngitis and bilaterally enlarged lymph nodes. The child’s condition worsened and he eventually developed into respiratory distress. Of the following choices, the disease that is most likely causing these symptoms is:

A cerebral spinal fluid (CSF) from a neonate grows gram-positive cocci that are beta-hemolytic and catalase negative. The group of tests that would be most helpful in identifying the organism are:

All of the following media are selective and differential media. Which of the choices would be the best to isolate Staphylococcus aureus?

Coagulase is a test that will differentiate which of the following two organisms:

Hyaluronidase, an enzyme produced by more than 90% of Staphylococcus aureus strains, is also referred to as:

Each of the following are indicative of Neisseria gonorrhoeae infection.  One of these scenarios will require additional testing to rule out Gonorrhoeae.  Which one requires additional testing?