cell wall structure of gram-negative bacteria for example helicobacter.

antibiotic antibiotics bacilli bacteria bacterial bacteriology biology care cell cellular cytoplasm difference differentiation germ gram health healthcare helicobacter illustration infection infectious mechanism medical medicine membrane microbe microbial microbiology negative pathogen penicillin peptidoglycan plasma plasmid porins positive protein pulori replication resistance resistant science stain staphylococcus structure teichoic treatment vector wall