acid-fast adenosine diphosphate adenosine triphosphate anaerobic digestion anaerobic organism animal bacillus bacteria bacterial cell structure bacterial disease bacterial outer membrane biofilm cell capsule cell envelope cell membrane cell wall cellular respiration coccobacillus coccus diaminopimelic acid diplococcus energy exotoxin facultative anaerobic organism fat fungus glucose glycocalyx glycolysis gram-negative bacteria gram-positive bacteria gut flora human flora lactic acid lipophilic bacteria lipopolysaccharide lipoteichoic acid lysogenic cycle microaerophile microbiology monosaccharide mycobacterium tuberculosis n-acetylglucosamine n-acetylmuramic acid nanaerobe nocardia obligate anaerobe organism oxidative phosphorylation oxidative stress pathogenic bacteria peptidoglycan periplasmic space pilus pseudomonas aeruginosa skin flora slime layer sugar teichoic acid vaginal flora water yeast