Which disinfectant is the most effective? and why? Which disinfectant(s) is (are) bactericidal? and why?

Principles Of Pharmacology Med Assist
6th Edition
ISBN:9781337512442
Author:RICE
Publisher:RICE
Chapter15: Antibiotic Agents
Section: Chapter Questions
Problem 20RQ
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Which disinfectant is the most effective? and why?
Which disinfectant(s) is (are) bactericidal? and why?
**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.
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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