A gram-positive bacillus doesn't have an outer cell wall beyond the peptidoglycan membrane. This makes it more absorbent. Its peptidoglycan layer is much thicker than the peptidoglycan layer on gram-negative bacilli. Gram-positive bacilli are shaped like rods.
(cocci) a group of spherical bacteria that retains the violet stain following gram staining. Supplement. Gram staining is a useful method for the rapid identification of bacterial species, especially those that are causing disease.
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