Research Article
Formulation and Evaluation of Antibacterial Creams and Gels Containing Metal Ions for Topical Application
Table 6
Antimicrobial activity during the stability study.
| Product | Type of storage container | Testing period
| Zone of inhibition (mm) (mean ± SD) | Temperature | 4°C | 25°C |
| C1 | Plastic jar | Day 1 | 22.7 ± 0.4 | 23.9 ± 0.2 |
| Week 3 | 23.4 ± 0.6 | 22.4 ± 0.7 |
| Week 6 | 23.1 ± 0.4 | 22.2 ± 0.5 |
| Week 9 | 22.8 ± 0.5 | 21.4 ± 0.1 |
| Week 12 | 22.1 ± 0.3 | 21.7 ± 0.4 | Glass jar | Day 1 | 23.6 ± 0.1 | 24.1 ± 0.8 | Week 3 | 21.9 ± 0.2 | 21.9 ± 0.2 | Week 6 | 22.1 ± 0.2 | 21.7 ± 0.5 | Week 9 | 22.1 ± 0.5 | 21.6 ± 0.3 | Week 12 | 21.9 ± 0.2 | 21.2 ± 0.2 |
| G1 | Plastic jar | Day 1 | 25.3 ± 0.3 | 24.8 ± 0.4 |
| Week 3 | 25.5 ± 0.4 | 25.0 ± 0.2 |
| Week 6 | 24.2 ± 0.3 | 24.2 ± 0.6 |
| Week 9 | 25.5 ± 0.4 | 25.6 ± 0.5 |
| Week 12 | 24.3 ± 0.6 | 25.1 ± 0.1 | Glass jar
| Day 1 | 25.3 ± 0.3 | 24.7 ± 0.7 | Week 3 | 25.6 ± 0.3 | 25.1 ± 0.2 | Week 6 | 24.1 ± 0.3 | 24.2 ± 0.2 | Week 9 | 25.2 ± 0.3 | 25.7 ± 0.2 | Week 12 | 24.4 ± 0.2 | 24.7 ± 0.4 |
| Control (gentamicin) | 22.4 ± 0.8 |
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