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Questions and Answers
What is the definition of antibiotics?
What is the definition of antibiotics?
- Chemical substances that only kill gram-negative rods
- Chemical substances that are resistant to hydrolysis by β-lactamases
- Chemical substances that kill or inhibit the growth of microorganisms (correct)
- Chemical substances that are only active against fungi
What is the origin of the word 'antibiotic'?
What is the origin of the word 'antibiotic'?
- It was coined by Alexander Fleming in 1928
- It originated from the Greek words anti and bios
- It came from the word antibiosis, coined by Louis Pasteur’s pupil Paul Vuillemin (correct)
- It was derived from the term 'antipseudomonal'
Which microorganisms are antistaphylococcal penicillins (e.g., nafcillin) active against?
Which microorganisms are antistaphylococcal penicillins (e.g., nafcillin) active against?
- Anaerobic bacteria and gram-negative cocci
- Staphylococci and streptococci (correct)
- Gram-positive rods and gram-negative rods
- Staphylococci and enterococci
What is the primary characteristic of extended-spectrum penicillins (e.g., ampicillin and the antipseudomonal penicillins)?
What is the primary characteristic of extended-spectrum penicillins (e.g., ampicillin and the antipseudomonal penicillins)?
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What is the literal meaning of the Greek words 'anti' and 'bios' which form the term 'antibiotic'?
What is the literal meaning of the Greek words 'anti' and 'bios' which form the term 'antibiotic'?
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