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Media such as MacConkey agar contain bile salts that make them selective for:   Gram-positive cocci  gram-negative bacilli Gram-positive bacilli  gram-negative cocci

A pustule drainage submitted for culture is plated onto primary media. After an18-hour incubation, the sheep blood agar plate reveals a predominance of beta-hemolytic, white, porcelain-like colonies. Gram stain shows gram-positive cocci that are catalase positive. The most appropriate test for additional identification of the isolate is:   bacitracin   bile solubility bile esculin   coagulase

Paired, acute, and convalescent blood samples are needed for diagnostic viral serology testing. The recommended intervals for collection are:                          Acute                   Convalescent            13-15 days                         50-60 days                 11-13 days             40-50 days                     7-9 days                 20-30 days                    5-7 days                10-20 days

The commonly used confirmatory test for HIV infection is the _____.   Enzyme immunosorbent assay Northern blot Lymulus amebiocyte lysate assay Western blot

Which one of the following microorganisms cannot be cultivated on artificial cell-free media?   Francisella tularensis                     Actinobacillus lignieresii Helicobacter pylori                         Mycobacterium leprae

The tech is working in microbiology and typically there is an automatic call list generated by the laboratory information system (LIS) for urgent microbiology alerts. The LIS is currently down for maintenance so the tech has to manually pull a list of urgent reports. Which of the following shoud the tech consider as an urgent result? 

Critical results from the microbiology department must be communicated to the physician immediately. All of the following results are considered critical EXCEPT? 

A suspected colony of Neisseria gonorrhoeae is tested with 1% tetramethyl-p-phenylenediamine dihydrochloride. This is commonly known as the:   catalase test oxidase test esculin hydrolysis test beta-lactamase test

  The __________ procedures are DNA-amplification testing methods that have become the new gold standard for the direct detection of Chlamydia trachomatis.  

Which one of the following microorganisms cannot be cultivated on artificial cell-free media?   Francisella tularensis                     Actinobacillus lignieresii Helicobacter pylori                         Mycobacterium leprae