anti-bacterialagents anti-infectiveagents antibiotica antiinfectieux bacteria bacterialphysiologicalphenomena bactéries biochemie drugeffects drugresistance effetsdesantibiotiquessurles effetsphysiologiques fungi host-parasiteinteractions host-parasiterelationship immunology immunopharmacology medischechemie micro-organismes microbial microbialmetabolism microorganisms moleculairebiologie métabolisme pharmacology physiologicaleffect physiology qv250 qv350f834b1989 qv350i431985 viruses