Which test is used to diagnose Hendra virus?

The Hendra virus, which primarily affects horses and can spread to humans, requires specific diagnostic tests for accurate identification. Serological tests are essential because they detect antibodies that the immune system produces in response to the virus. This is crucial for identifying a past infection and assessing exposure, particularly in susceptible animal populations.

Remote testing may also be relevant as it encompasses diagnostic methods performed outside of a traditional laboratory setting, especially in cases where immediate assessment is necessary, such as field testing in areas where the virus is known to circulate.

While PCR (polymerase chain reaction) can be an important tool for detecting the viral RNA directly, which is particularly useful in acute cases, the tests listed in the option including serology and remote testing are necessary to provide a comprehensive diagnostic picture, especially in varying contexts such as suspected outbreaks or when direct viral detection is challenging. Thus, selecting B and C as key diagnostic tests accurately reflects the importance of both antibody detection and flexible testing methodologies in the context of Hendra virus diagnosis.