Found this:
What is the difference between Antimicrobial and Antibiotic?
• Antimicrobials act against a wide variety of organisms while antibiotics act only against bacteria.
• Antimicrobials include antibacterial, antifungal, antiviral, anti helminthes and anti protozoa.
• Unlike in most of the antimicrobials, resistance is a problem with antibiotics.
• Adverse effects vary depending on the type of drug.
www.differencebetween.com/difference-between-antibiotic-and-vs-antimicrobial/