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Author Archives: Anonymous

Low numbers of Salmonella in a stool sample can be increased…

Low numbers of Salmonella in a stool sample can be increased while maintaining other organisms in the sample at a constant level by inoculating the stool into:

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Which of the following can be mistaken for parasitic structu…

Which of the following can be mistaken for parasitic structures by inexperienced medical laboratory scientists?

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This egg morphology is characteristic of which of the follow…

This egg morphology is characteristic of which of the following organism? m61__xid7922610_2.jpg

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Of the following mechanisms, the mode of action of the amino…

Of the following mechanisms, the mode of action of the aminoglycosides is:

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A wound culture grows colorless colonies on MacConkey agar….

A wound culture grows colorless colonies on MacConkey agar. O-F glucose media were inoculated with the isolate. The results are: Open tube = green and Closed tube = green. The correct interpretation of the results is that the organism:

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A characteristic common to Chlamydia, Herpes simplex type 1,…

A characteristic common to Chlamydia, Herpes simplex type 1, Mycobacterium leprae, and Treponema pallidum, is that all of these organisms:

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A blood culture grows alpha hemolytic, gram positive cocci t…

A blood culture grows alpha hemolytic, gram positive cocci that are catalase negative. The patient has a previous history of rheumatic fever and has had recent dental surgery. The organisms are optochin resistant, negative for bile esculin and negative growth in 6.5% NaCl. Of the following choices, which is the most likely organism causing this patients bacteremia?

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A gram stain of a CSF from an infant brought to the emergenc…

A gram stain of a CSF from an infant brought to the emergency room with symptoms of meningitis revealed many PMN’s and pleomorphic gram-negative rods. The most likely organism to be causing the meningitis is:

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A sputum culture from a patient with cystic fibrosis grew th…

A sputum culture from a patient with cystic fibrosis grew the following gram-negative bacteria. According to the colony morphology, oxidase test and TSIA reaction, what is the most likely genus and species of this organism? m50__xid7922400_2.jpg

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A type of mouth closure where the stitch is placed behind th…

A type of mouth closure where the stitch is placed behind the lips, one part is passed through the inferior jaw at the median plane, while the other part extends through the nasal septum  is the

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