If the peptidoglycan layer is thin, it's classified as gram negative. A gram-positive bacillus doesn't have an outer cell wall beyond the peptidoglycan membrane. This makes it more absorbent.

The sophisticated QUANTOM™ cell counting algorithm is the first of ... formulated to permeate the membranes of both gram positive and gram negative bacteria with ease. This dye stains both ...

Ceftazidime-avibactam and ceftolozane-tazobactam were the most commonly prescribed antibiotics of all broad-spectrum agents approved in the past decade.

The searches combined terms for Gram-negative bacteria, appropriate or inappropriate initial antimicrobial therapy, nosocomial or hospital-acquired or healthcare-associated bacterial acquisition ...