Which of the following symptoms may be associated with West Nile virus?

The correct response highlights that West Nile virus can present a wide spectrum of symptoms that vary significantly in severity. This variability is crucial in identifying and understanding the illness, as it can lead to anything from mild flu-like symptoms to more severe neurological complications, including encephalitis or meningitis. Recognizing that the virus does not affect everyone the same way allows healthcare providers to respond appropriately, regardless of whether the patient's symptoms are mild, moderate, or severe.

While other symptoms listed in the options may occur, they do not capture the full range of manifestations associated with West Nile virus, which is characterized by its potential to affect patients differently. This understanding is vital in the field of public health and for nuisance wildlife control operators who may encounter related wildlife during their work.