In a phenomenon known as satelliting, tiny colonies of Haemophilus spp. may be observed growing on sheep blood agar close to colonies of bacteria that can produce:

a. hemin.
b. NAD.
c. vitamin K.
d. cystine.


B
Five percent sheep blood agar contains hemin but not NAD. Several bacterial species, including S. aureus, produce NAD as a metabolic byproduct. Therefore, tiny colonies of Haemophilus spp. may be observed growing on sheep blood agar close to colonies of bacteria that can produce V factor. This phenomenon is known as satelliting.

Biology & Microbiology

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Match the second messenger on the left with the properties on the right.

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Biology & Microbiology

Syphilis was once treated by intentionally infecting the patient with the parasite that causes malaria, a disease characterized by repeated bouts of fever, shaking, and chills

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Biology & Microbiology

Which are endocrine organs? (Check all that apply.)  

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Biology & Microbiology