Introduction:
Antibiotics are powerful medications that are used to treat bacterial infections. They work by either killing the bacteria or preventing their growth. However, it is important to note that antibiotics are not effective against viral infections.

Diseases:
Out of the given options, only typhoid can be cured using antibiotics. Let's look at the other diseases and why antibiotics are not effective against them:

1. AIDS:
AIDS (Acquired Immunodeficiency Syndrome) is a chronic and life-threatening condition caused by the HIV virus. HIV is a virus, and antibiotics are ineffective against viral infections. Antiretroviral therapy (ART) is the standard treatment for managing HIV infection, but it does not cure the disease. ART helps control the virus, improves the immune system, and prevents the progression of HIV to AIDS.

2. Dengue:
Dengue is a viral infection transmitted by mosquitoes. Antibiotics do not have any effect on the dengue virus as it is a viral infection. The treatment for dengue mainly focuses on managing the symptoms and providing supportive care. It includes rest, hydration, and pain relief medication.

3. Malaria:
Malaria is a parasitic infection caused by Plasmodium parasites. Antibiotics are not effective against parasites, so they cannot cure malaria. The treatment for malaria involves antimalarial medications that specifically target the parasite. The choice of medication depends on the species of Plasmodium causing the infection and the severity of the disease.

4. Typhoid:
Typhoid fever is a bacterial infection caused by the Salmonella typhi bacteria. Antibiotics such as fluoroquinolones or third-generation cephalosporins can effectively treat typhoid fever. These antibiotics kill the bacteria or inhibit their growth, allowing the body to recover from the infection.

Conclusion:
In summary, antibiotics are only effective against bacterial infections. They cannot cure viral infections like AIDS and dengue, or parasitic infections like malaria. Typhoid fever is the only disease among the given options that can be cured using antibiotics. It is important to correctly diagnose the type of infection and use the appropriate treatment to ensure effective management of the disease.