| Microorganism |
MIC50
(μg/ml) |
MIC90
(μg/ml) |
Range
(μg/ml) |
Antimicrobial |
Reference |
| Lactobacillus helveticus |
64 |
64 |
16 － 64 |
Ciprofloxacin (Cipro, Ciproxin, Ciprobay)  |
1380 |
| Lactobacillus helveticus |
256 |
512 |
32 － 1024 |
Tetracycline (Sumycin, Achromycin V, Steclin) |
1380 |
| Lactobacillus helveticus (ciprofloxacin-resistant + tetracycline-resistant) |
- |
- |
16 － 64 |
Ciprofloxacin (Cipro, Ciproxin, Ciprobay) |
1380 |
| Lactobacillus helveticus (ciprofloxacin-resistant + tetracycline-resistant) |
- |
- |
32 － 1024 |
Tetracycline (Sumycin, Achromycin V, Steclin) |
1380 |
| Lactobacillus helveticus (Etest) |
- |
- |
≤0.12 － 0.25 |
Ampicillin (Omnipen) |
1036 |
| Lactobacillus helveticus (Etest) |
- |
- |
≤0.12 － 0.25 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
1036 |
| Lactobacillus helveticus (Etest) |
- |
- |
≤0.12 － 1 |
Tetracycline (Sumycin, Achromycin V, Steclin) |
1036 |
| Lactobacillus helveticus (Etest) |
- |
- |
≤0.12 － 4 |
Clindamycin (Cleocin) |
1036 |
| Lactobacillus helveticus (Etest) |
- |
- |
0.25 － 16 |
Streptomycin |
1036 |
| Lactobacillus helveticus (Etest) |
- |
- |
0.5 － 8 |
Gentamicin (Gentamycin, Garamycin) |
1036 |
| Lactobacillus helveticus (LH 09 + Greece) |
- |
- |
500 － ? |
Propolis (Ethanol extract) |
1149 |
| Lactobacillus helveticus (PR4) |
- |
- |
90 － ? |
Caprino del Piemonte (Water-soluble extract) |
636 |
| Lactobacillus helveticus (PR4) |
- |
- |
110 － ? |
Pecorino Romano (Water-soluble extract) |
636 |
| Lactobacillus helveticus (PR4) |
- |
- |
160 － ? |
Canestrato Pugliese (Water-soluble extract) |
636 |
| Lactobacillus helveticus (PR4) |
- |
- |
250 － ? |
Crescenza (Water-soluble extract) |
636 |