Name one method used for field detection of biological agents.

Biosensors are a critical method used for the field detection of biological agents due to their ability to provide rapid and specific identification of pathogens. These devices leverage biological recognition elements, such as antibodies or nucleic acids, integrated with a transducer to convert the biological interactions into measurable signals.

In a field setting, where time is of the essence, biosensors can detect and characterize biological threats efficiently, often delivering results within minutes. This immediacy is crucial for initiating timely medical countermeasures and containment strategies in the event of a biological incident.

Other methods, such as culturing samples in a laboratory, while accurate, are not practical for immediate field detection due to the time required for growth and analysis. X-ray imaging is primarily used for anatomical visualization and does not have a direct application for biological agent detection. Blood tests, although useful for diagnosing infections after exposure, also require laboratory conditions and are not suitable for instant detection in the field.