Chapter15: Antibiotic Agents
Section: Chapter Questions
Problem 20RQ
Related questions
Question
Which disinfectant is the most effective? and why?
Which disinfectant(s) is (are) bactericidal? and why?
Transcribed Image Text:**Bacterial Growth Analysis Post Disinfectant Exposure**
This data table is used to examine the efficacy of four disinfectants against *Salmonella Choleraesuis* based on a use-dilution test. The symbols in the table represent bacterial growth (G) and no growth (NG) following exposure.
### Table: Bacterial Growth after Exposure to Disinfectants
| Dilution | Disinfectant A | Disinfectant B | Disinfectant C | Disinfectant D |
|----------|----------------|----------------|----------------|----------------|
| 1:2 | NG | G | NG | NG |
| 1:4 | NG | G | NG | G |
| 1:8 | NG | G | G | G |
| 1:16 | G | G | G | G |
**Explanation:**
- **Dilution Ratios:** The table examines effectiveness across various dilution ratios: 1:2, 1:4, 1:8, and 1:16.
- **Disinfectant Efficacy:**
- **Disinfectant A** shows no growth up to a 1:8 dilution, indicating strong efficacy at higher concentrations.
- **Disinfectant B** results in bacterial growth at all dilutions, suggesting a lack of effectiveness.
- **Disinfectant C** prevents growth up to a 1:4 dilution, losing efficacy at 1:8.
- **Disinfectant D** is ineffective beyond a 1:2 dilution, similar to Disinfectant B.
This table helps in assessing which disinfectant maintains its bacterial growth inhibition capability at various concentrations.
Expert Solution
Answer-1
Disinfectant A is most effective as there is no growth of salmonella choleraesuis at dilution 1:2 ,1:4 or 1:8.
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