Bacteroides fragilisBacteroides InfectionsEnterotoxinsBacteroidesDiarrheaMetalloendopeptidasesBacterial ToxinsFecesEnterotoxigenic Escherichia coliBacteria, AnaerobicPrevotella melaninogenicaFusobacteriumEscherichia coli InfectionsEscherichia coliClindamycinCefoxitinFimbriae ProteinsMicrobial Sensitivity TestsEscherichia coli VaccinesAbscessAnaerobiosisMetronidazoleAnti-Bacterial Agents