Antibiotics are usually not given for an _______________ infection, as they may worsen the disease process.
(a) Escherichia coli
(b) Streptococcus
(c) Pseudomonas aeruginosa
(d) Salmonella typhii

Options

A. Escherichia coli
B. Streptococcus
C. Pseudomonas aeruginosa
D. Salmonella typhii

Answer

To solve the question, we need to determine which organism's infection antibiotics should not be given, as they may worsen the disease process. Let's analyze each option:

1. **Understanding Antibiotics**: Antibiotics are medications used to treat bacterial infections by inhibiting the growth or reproduction of bacteria. However, in some cases, administering antibiotics can have adverse effects.

2. **Analyzing the Options**:
- **(a) Escherichia coli (E. coli)**: Certain strains of E. coli, particularly those that produce toxins (like Enterohemorrhagic E. coli), can release more toxins when antibiotics are administered. This can lead to a severe condition known as hemolytic uremic syndrome (HUS), which can be life-threatening. Therefore, antibiotics are typically not recommended for infections caused by these strains.

- **(b) Streptococcus**: Antibiotics are commonly used to treat infections caused by Streptococcus, such as strep throat, as they effectively reduce symptoms and prevent complications.

- **(c) Pseudomonas aeruginosa**: This bacterium is often treated with antibiotics, especially in cases of serious infections, as it is known to cause severe illnesses.

- **(d) Salmonella typhii**: This bacterium causes typhoid fever, and antibiotics are often used to treat this infection, especially in severe cases.

3. **Conclusion**: Given the analysis, the correct answer is **(a) Escherichia coli**. Antibiotics are usually not given for an E. coli infection, particularly those that produce toxins, as they may worsen the disease process.

**Final Answer**: (a) Escherichia coli

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