TABLE 1.

General characteristics of anaerobic bacteria used in this studya

StrainSourceDrug resistanceGene(s) presentReference or strain designation
Butyrivibrio fibrisolvens
    1.230bBovine rumen; RRITcrtet(W), tet(O)19
    1.210Bovine rumen; RRITcrtet(O)19
    2221Type strain of B. fibrisolvensTcsATCC 19171
    2221RSpontaneous Rifr mutant of 2221Tcs19
Selenomonas ruminantium FB322bBovine rumen; RRITcrtet(W)7
Mitsuokella multiacidus P208-58Pig feces; JapanTcrtet(W)13
Clostridium sp. strain K10Human feces; RRITcrtet(W), tet(32)20
Bifidobacterium longum F5bHuman feces; RRITcrtet(W)20
Roseburia sp. strain A2-183bHuman feces; RRITcrtet(W)3
  • a Abbreviations: RRI, Rowett Research Institute, Aberdeen, United Kingdom; Rifr, rifampicin-resistant mutant of type strain 2221; Tcs, tetracycline sensitive.

  • b Strains in which the 340 bp immediately upstream of tet(W) are identical.