Table 2.
Apoptotic index, cytotoxic, adhesion, invasion activities and production of lipase, lecithinase and proteinase by S. haemolyticus strains
| Strain no | Apoptotic indexa (%) | Cytotoxicity (%) | Adhesion indexd(×106) | Invasion indexe (%) | Exoenzyme | ||||
|---|---|---|---|---|---|---|---|---|---|
| 24 h | 48 h | Cell-contactb | Extracellularc | L | Le | P | |||
| MPU Sh4 | 59.8 | 89.8 | 66.7 | 72.8 | 6.9 | 12.6 | + | + | + |
| MPU Sh3 | 51.3 | 79.9 | 60.6 | 70.9 | 2.3 | 0.8 | − | − | − |
| MPU Sh9 | 48.7 | 76.9 | 63.6 | 81.5 | 13.5 | 16.9 | + | − | + |
| MPU Sh15 | 48.1 | 62.9 | 56.0 | 61.2 | 2.1 | 0.2 | − | + | − |
| MPU Sh27 | 47.2 | 69.1 | 54.9 | 39.6 | 8.6 | 0.6 | − | + | − |
| MPU Sh11 | 46.2 | 63.9 | 60.6 | 69.1 | 8.4 | 6.4 | + | − | + |
| MPU Sh13 | 43.1 | 58.4 | 53.0 | 62.1 | 15.3 | 0.8 | + | − | + |
| MPU Sh8 | 42.9 | 71.1 | 57.6 | 81.5 | 2.3 | 0 | + | + | − |
| MPU Sh20 | 42.8 | 76.2 | 31.8 | 33.5 | 13.1 | 9.7 | + | + | − |
| MPU Sh29 | 42.1 | 62.8 | 51.2 | 71.1 | 0.7 | 0 | − | − | − |
| MPU Sh10 | 41.9 | 73.4 | 65.1 | 69.1 | 7.3 | 0.03 | − | + | − |
| MPU Sh17 | 41.8 | 61.6 | 31.8 | 68.9 | 9.1 | 0 | − | + | − |
| MPU Sh12 | 41.7 | 71.3 | 57.6 | 79.6 | 1.3 | 0 | − | + | − |
| MPU Sh5 | 41.6 | 79.5 | 57.6 | 77.7 | 0.8 | 10.4 | + | − | + |
| MPU Sh25 | 41.2 | 69.8 | 22.7 | 73.2 | 9.6 | 0.01 | − | + | − |
| MPU Sh6 | 39.6 | 42.7 | 9.6 | 75.7 | 9.8 | 3.1 | − | + | − |
| MPU Sh19 | 38.7 | 69.3 | 13.6 | 14.8 | 14.6 | 0.01 | − | + | − |
| MPU Sh1 | 38.5 | 41.3 | 72.7 | 77.7 | 12.3 | 3.2 | − | + | − |
| MPU Sh7 | 36.8 | 39.7 | 37.9 | 38.6 | 10.2 | 0 | − | − | − |
| MPU Sh30 | 31.6 | 37.9 | 45.4 | 11.2 | 13.7 | 0 | − | − | − |
| MPU Sh16 | 31.2 | 34.9 | 43.9 | 35.0 | 8.9 | 1.4 | − | − | − |
| MPU Sh2 | 19.8 | 65.2 | 62.1 | 67.3 | 0.6 | 17.9 | + | − | + |
| MPU Sh22 | 14.5 | 28.9 | 36.4 | 24.7 | 1.1 | 0 | − | − | − |
| MPU Sh24 | 9.1 | 21.3 | 37.9 | 13.0 | 11.8 | 0.07 | − | + | − |
| MPU Sh14 | 6.7 | 21.3 | 45.5 | 25.7 | 13.6 | 0 | − | − | − |
| MPU Sh28 | 4.2 | 6.9 | 37.9 | 16.8 | 0.4 | 0 | − | − | − |
| MPU Sh21 | 3.1 | 4.8 | 19.7 | 26.7 | 8.3 | 0.01 | − | − | − |
| MPU Sh18 | 3.1 | 9.3 | 25.7 | 13.8 | 0.2 | 0.04 | − | − | − |
| MPU Sh23 | 1.9 | 3.9 | 25.8 | 42.8 | 0.9 | 0 | − | − | − |
| MPU Sh26 | 1.2 | 2.2 | 34.8 | 21.2 | 8.4 | 0 | − | − | − |
The data are the means from two separate experiments in triplicate
L lipase, Le lecithinase (phospholipase), P proteinase
aPercentage of apoptotic cells
b,cPercentage of cytotoxicity was determined by NR assay
dMean number of associated (CFU) bacteria/1 × 105 HEp-2 cells
ePercentage of the number of internalized bacteria compared to the number of those adhered