Table 2.

Summary of differential characteristics of the strainsa

CharacteristicOur data (% positive) for cluster:Data from references 5 and9Data from API 20 Strep chart (% positive)
1 ( n = 3 )2a ( n = 1 )2b ( n = 17 )S. InfantariusS. bovisbiotype II/1S. bovis biotype II/2S. gallolyticusTypical biotype IS. bovis biotype II/1S. bovis biotype II/2
Production of:
 Beta-glucosidase100 100 100b v/++++NDe NDND
 Beta-glucuronidase0 0 100 +4188
 Alpha-galactosidase100 0 100 ++v+718685
 Beta-galactosidase0 100 100 +141794
 Beta-mannosidase0 0 100b +vNDNDND
Acid from:
 Trehalose0 100 100 ++903099
 Raffinose100d 100d 100 v+v+909972
 Inulin0 0 0 ++636113
 Starchc fastfastslow+/v++1007340
 Glycogen33 100 0 +/−++906518
 Pullulans331000b v/−+NDNDND
 Melibiose0 0 20b v/−+NDNDND
 Mannitol0 0 0b +8600
  • a Our data, which were obtained by testing our strains on both the API 20 Strep and API 32 Strep systems, is shown in the first group of columns. It is contrasted with data in subsequent columns from references 5 and 9 combined and the API 20 Strep chart.

  • b Only 11 strains tested.

  • c With extended incubation (1 week), all strips became positive: fast, positive in 24 to 48 h; slow, positive in >48 h.

  • d Positive on API 20 Strep but negative on the rapid ID 32 Strep.

  • e ND, not in API 20 Strep database.