CPT® Code 87484

The CPT® Code 87484 refers to a laboratory test specifically designed for the detection of the infectious agent Ehrlichia chaffeensis through the use of nucleic acid amplification techniques, which can involve either DNA or RNA. Ehrlichia chaffeensis is classified as a gram-negative rickettsial bacterium that is primarily transmitted to humans via tick bites. Infection with this bacterium can lead to human monocytic ehrlichiosis, a condition characterized by flu-like symptoms that may escalate to severe complications, including multisystem toxic-shock type disease, meningitis, or adult respiratory distress syndrome if left untreated. The detection of Ehrlichia chaffeensis is accomplished through advanced molecular techniques such as polymerase chain reaction (PCR), which allows for the amplification of specific DNA or RNA sequences associated with the pathogen. This process is crucial for identifying the presence of the bacterium in a patient's sample, as it can significantly impact clinical management and treatment decisions. The test utilizes methods like real-time polymerase chain reaction (qPCR) or reverse transcription polymerase chain reaction (RT-PCR) for RNA detection, ensuring high sensitivity and specificity in identifying the pathogen. By exponentially amplifying the target nucleic acid sequences, the test can provide rapid and accurate results, which are essential for timely intervention in affected patients.