What is the combined purpose of culture and sensitivity testing?

• A. Culture identifies the organism and sensitivity testing identifies the most effective antibiotic
• B. Culture measures fever response
• C. Sensitivity testing determines the infection source
• D. Culture identifies patient allergies

Answer: (A)

The main idea is that culture and sensitivity testing work together to guide antimicrobial therapy by identifying the organism causing the infection and by pinpointing which antibiotic will work best against it. Culturing a sample isolates and identifies the pathogen, while sensitivity (antibiotic susceptibility) testing shows which antibiotics are effective against that specific organism and at what concentrations. This combination lets clinicians tailor treatment to the exact pathogen, using the most appropriate drug and avoiding unnecessary broad-spectrum antibiotics. It also helps limit resistance and reduce side effects. Other statements don’t fit this purpose: fever response isn’t determined by culture, culture doesn’t reveal where the infection came from, and culture/sensitivity don’t identify patient allergies.