Atypical bacteria are bacteria that do not color with gram-staining but rather remain colorless, they are neither Gram-positive nor Gram-negative (they’re atypical! 😛). These include Chlamydiaceae, Legionella, and Mycoplasma; though Rickettsiaceae are also often considered atypical bacteria.
The CYP450 enzymes are essential for the production of numerous agents including cholesterol and steroids. Additionally, these enzymes are necessary for the detoxification of foreign chemicals and the metabolism of drugs.
Drugs that are CYP450 inhibitors block the metabolic activity of one or more of the CYP450 enzymes. The extent to which an inhibitor affects the metabolism of a drug depends upon factors such as the dose and the ability of the inhibitor to bind to the enzyme.
Antibiotics can be bacteriostatic (static=unmoving) meaning that the agent prevents the growth of bacteria or bactericidal (rhymes with suicidal) meaning that it kills bacteria.
Keep in mind that bacteriostatic and bactericidal categorizations in clinical practice are not absolute and can vary depending on the dose and what is being treated.