Which statement about nitrite testing in UTIs is supported by the material?

Which statement about nitrite testing in UTIs is supported by the material?

• A. A negative nitrite test rules out UTI with certainty.
• B. Nitrite can be negative in some UTIs; culture may still be needed for confirmation.
• C. Nitrite testing is the most reliable indicator of UTI.
• D. Nitrite testing is not used in urinalysis.

Answer: (B)