Antibiotics target bacterial infections only

Steps:

• Antibiotics kill or inhibit bacteria, not viruses, parasites, or nutritional deficiencies.
• Identify the cause of each disease: bacterial, viral, parasitic, or deficiency.
• Match cholera to bacterial cause.
• Confirm antibiotics are standard treatment for bacterial cholera.

Why A is correct:

• Cholera is caused by the bacterium Vibrio cholerae, which antibiotics like doxycycline directly target and eliminate.

Why the others are wrong:

• B. HIV is a viral infection; antibiotics do not affect viruses.
• C. Malaria is caused by Plasmodium parasites; antimalarials, not antibiotics, are used.
• D. Scurvy results from vitamin C deficiency; it requires dietary supplements, not antibiotics.

Final answer: A