
Hypervirulent Klebsiella pneumoniae has virulence genes relevant to capsule overproduction, which could lead to the finding of thick transparent area ("halo") in Gram stain. In sputum Gram stain, observation of a large Gram-negative rod with a thick capsule may not only indicate that it is K. pneumoniae but also that it is a highly virulent strain.
Klebsiella pneumoniae, Medicine (General), R5-920, Clinical Images, capsule, Gram stain, halo, hypervirulent
Klebsiella pneumoniae, Medicine (General), R5-920, Clinical Images, capsule, Gram stain, halo, hypervirulent
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