A positive Simmons citrate test is seen as a:

Mycobacteria stained by the Ziehl-Neelsen or Kinyoun methods with methylene blue counterstain are seen microscopically as:

Which of the following is the best technique to identify Dientamoeba fragilis (a parasite) in stool?

“Clue cells” are seen on a smear of vaginal discharge obtained from an 18-year old female ER patient. This finding, along with a fishy odor (amine) after the addition of 10% KOH, suggests bacterial vaginosis caused by which organism?

An anaerobic medium, LKV blood agar, is for this purpose:

Patients receiving lipid-supplemented parenteral nutrition are at risk for developing fungemia caused by which organism?

What concentration of sodium hydroxide (NaOH) is used to prepare a working decontamination solution for the processing of not normally sterile specimens for mycobacteria?

The salt tolerance test (6.5%) salt broth is used to presumptively identify:

The microbiologist receives a sputum specimen that upon preliminary Gram staining review of direct smear, contains numerous squamous epithelial cells and an excessive amount of contaminating normal flora. Based on the microbiologist’s knowledge, the microbiologist rejects the specimen and requests a new sample. The physician insists that the microbiologist culture the sample as received. The microbiologist should:

The most likely identification of a bile-resistant, kanamycin-resistant, colistin-resistant, and vancomycin-resistant anaerobic gram-negative bacilli is: