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.

All patients with suspected Gram-negative endocarditis should undergo transesophageal echocardiography (TEE) to confirm the diagnosis and assess for cardiac complications such as intracardiac ...

We report here the observation of a periplasmic space in the Gram-positive Streptococcus pneumoniae by cryo-electron microscopy of vitreous sections ... Fenel from the IBS for performing the negative ...

Department of Biology, Faculty of Sciences, University of Guilan, 4199613776 Rasht, Iran ...