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Which of the following statements are true related to exam/quiz expectations? (select all that apply)

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

Dark-field microscopy can be used to determine infection with:   Fusobacterium nucleatum   Nocardia asteroides Treponema pallidum   Clostridium difficile

The organism believed to be a cause of human peptic ulcer disease as well as the most frequent cause of gastritis is _____.   Salmonella typhimuridum              Yersinia enterocolitica Campylobacter jejuni                   Helicobacter pylori

The diagnosis of syphilis may be suspected, confirmed, or both, by all of the following tests except:   dark-field examination of exudates cultivation of highly enriched media fluorescent antibody test rapid plasma reagin test

The organism that is the usual cause of severe obstructive epiglottitis, septicemia, and meningitis in young children is:   Haemophilus influenzae                Neisseria meningitidis Listeria monocytogenes              Streptococcus pneumoniae

On xylose-lysine-desoxycholate (XLD) agar, Salmonella typhi appears as :   Red colonies with black centers Yellow colonies with black centers Green colonies with black centers Blue colonies with red centers

Which of the following items must be achieved in order to pass the course and progress to N450 practicum?

A 19-year old male college student went to the campus health clinic complaining of painful urination. Upon physical examination, a whitish discharge from the urethra was collected and sent to the laboratory for gram stain. Based on the following, what is the most probable cause of his dysuria?      

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