Question 57

Blood culture is the test performed to identify bacteremia.

Blood culture is the standard test used to detect the presence of bacteria in the bloodstream, which is essential for diagnosing bacteremia.

A) Glucose tolerance test

The glucose tolerance test is primarily used to assess how well the body processes glucose and is not relevant for identifying bacteremia. It measures blood sugar levels after the ingestion of glucose but does not provide information about bacterial infections.

B) Peripheral blood smear

A peripheral blood smear is a test that examines the shape and number of blood cells under a microscope. While it can provide information about various blood disorders and infections, it is not specifically designed to identify bacteremia as it does not culture bacteria from the blood.

C) Blood culture

Blood culture is the definitive test for identifying bacteremia. This process involves taking a sample of blood and placing it in a culture medium to allow any bacteria present to grow, which can then be identified. This test is critical in diagnosing infections that have spread into the bloodstream.

D) Lactic acid

Lactic acid levels are measured to assess tissue hypoxia and metabolic conditions, but they are not specific for bacteremia. Elevated lactic acid can indicate various issues, including sepsis, but it does not confirm the presence of bacteria in the bloodstream.

Conclusion

Blood culture is the only option that directly tests for the presence of bacteria in the bloodstream, making it the definitive method for diagnosing bacteremia. The other options, while useful in various clinical contexts, do not provide the necessary information to confirm or rule out bacteremia. Thus, C is the correct answer.