CPT® Code 87275

The CPT® Code 87275 refers to a laboratory test specifically designed for the detection of the influenza B virus antigen using an immunofluorescent technique. This procedure is crucial in identifying the presence of the influenza B virus in respiratory samples, which can include nasopharyngeal swabs, aspirates, or washings, as well as endotracheal aspirates. Influenza is a highly contagious virus characterized by its single-stranded RNA structure, leading to acute upper respiratory infections. Common symptoms associated with influenza include fever, chills, muscle and body aches, headaches, fatigue, cough, sore throat, and nasal congestion. These symptoms typically persist for a duration of 3 to 7 days, although the cough may continue for two weeks or longer. The immunofluorescent technique employed in this test involves the use of specific antibodies that are conjugated to fluorescent dyes. When a respiratory sample is processed, antibodies targeting the influenza B virus are combined with the sample. If the influenza B virus is present, these antibodies will bind to the viral antigens found in the nucleoprotein of the virus, resulting in a bright green fluorescence when viewed under an epifluorescence microscope. Conversely, if the influenza A virus is present, antibodies specific to that strain will bind to its antigens, producing a yellow gold fluorescence. This test is particularly useful for diagnosing acute influenza illness in symptomatic patients. However, it is important to note that a negative result from this test should be confirmed through more sensitive methods, such as viral culture or reverse transcription-polymerase chain reaction (RT-PCR), to ensure accurate diagnosis and treatment.