If an antibiotic covers "anaerobes", does this include facultative anaerobes, or does it mean obligate anaerobes?

[Ven0m]

For example, the carbapenems cover "anaerobes". I'm wondering if this refers to "obligate anaerobes" only, or just any bacteria that doesn't require oxygen (obligate anaerobes + facultative anaerobes).

Same goes for antibiotics that cover "aerobes"; are these just "obligate aerobes" or does it include facultative anaerobes too?

I am asking this question because I do not know how to apply this information (eg, if I see a facultative anaerobic bacteria, I won't know which drugs are okay for it).

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