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A microbiologist examines culture plates with large nonpigmented gray colonies at 24 hours that are indole-negative, nonmotile, catalase-positive, and resistant to polymyxin B disks. The Gram stain shows this is a gram-negative coccobacillus. What is the most probable organism?
Cataract
A condition where the eye's lens becomes opaque, causing diminished eyesight.
Macular Degeneration
A medical condition which may result in blurred or no vision in the center of the visual field due to damage to the retina.
Optic Disk
The point in the eye where the optic nerve connects to the retina, also known as the blind spot.
Retina
A thin layer of tissue located on the inside back wall of the eye, containing cells that are sensitive to light and trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.
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