Because cell wall-damaged bacteria, antibiotic-treated bacteria, or dead bacteria may appear falsely gram-negative, what are "critical cocharacteristics"?

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When bacteria die, their Gram-staining characteristics are different than a living organism.For example, when Streptococcus pneumoniae dies, it can appear to be gram-negative, lancet-shaped diplococci.Normally S.pneumoniae is a gram-positive, lancet-shaped diplococci.One cannot always rely on color, but the size and shape of bacteria will always be the same.

Because Cell Wall-Damaged Bacteria, Antibiotic-Treated Bacteria, or Dead Bacteria May