What type of infection is NOT typically treated with Doxycycline?

Doxycycline is a tetracycline antibiotic that is effective against a range of bacterial infections, including those caused by certain gram-positive and gram-negative bacteria. It is commonly used to treat conditions such as acne vulgaris and specific sexually transmitted infections like gonorrhea, and it has activity against Acinetobacter infections as well.

Viral infections, on the other hand, are not treatable with antibiotics like doxycycline. Antibiotics target bacterial pathogens and are ineffective against viruses, which have different structures and replication mechanisms compared to bacteria. Therefore, viral infections are not a use case for doxycycline or any antibiotic treatment, making this the correct choice.

By understanding the actions and spectrum of doxycycline, one can better appreciate why it is not suitable for treating viral infections, as these require antiviral medications or supportive care instead.