In a phenomenon known as satelliting, tiny colonies of Haemophilus spp.may be seen growing on sheep blood agar very close to colonies of

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5% sheep blood agar contains hemin but not NAD. Several bacterial species, including Staphylococcus aureus, produce NAD as a metabolic by-product. Therefore, tiny colonies of Haemophilus spp. may be seen growing on sheep blood agar very close to colonies of bacteria that can produce V factor. This phenomenon is known as satelliting.

In a Phenomenon Known as Satelliting, Tiny Colonies of Haemophilus