Table 1.
Type-2 fimbriae subtypes on A. naeslundii genospecies 1 and 2 and A. odontolyticus with different binding properties.
| A. naeslundii | A. odontolyticus | ||
| gsp 1 | gsp 2 | ||
| 12104 | LY7 | PK984 | |
| Fimbriae typea | 2:1 | 2:2 | 2:3 |
| Sugar specificityb | |||
| Galβ | + (GL) | + (GP) | - |
| Sialic acid | - | - | + (GP) |
| Hemagglutinationc | |||
| Human | 1 | 0 | 4 |
| Human + sialidase | 3 | 4 | 1 |
aSubtypes of type-2 fimbriae, types-2:1 to 2:3, among Actinomyces species based on different hybridization patterns of strains with fimA-derived DNA probes and binding patterns to carbohydrates, red blood cells and bacterial partners [14].
b Saccharide specificity and receptor ligand (GL= glycolipid, GP = glycoprotein) for each fimbriae subtype or reference strain [20, 28].
c Hemagglutination (HA) patterns for each fimbriae subtype or reference strain. Score 0 marks no HA and score 4 strong HA. Similar HA results were obtained with goat and chicken erythrocytes (data not shown).