Final answer:
Lamivudine, Didanosine, and Nevirapine could not be used to treat bacterial infections. Dalfopristin and Zanamivir are options that could be used to treat bacterial infections.
Step-by-step explanation:
Out of the options provided, Lamivudine, Didanosine, and Nevirapine could not be used to treat a bacterial infection.
Lamivudine and Didanosine are antiviral medications used to treat HIV infection, not bacterial infections. They work by inhibiting the reverse transcriptase enzyme, preventing the replication of the HIV virus.
Nevirapine is also an antiviral medication used for the treatment of HIV infection. It works by blocking the reverse transcriptase enzyme, preventing the transcription of the viral RNA into DNA.
Dalfopristin and Zanamivir are the options that could be used to treat a bacterial infection. Dalfopristin is a streptogramin antibiotic, and Zanamivir is an antiviral medication specifically used to treat influenza virus infections.