Investigation of Dengue Virus Case in Northern Virginia

The Virginia Department of Health is currently looking into a confirmed case of dengue virus in a resident of Northern Virginia. This particular case stands out as it marks the first locally acquired instance of dengue in the state.

According to the VDH, they are collaborating with health departments from Fairfax and Loudoun counties to investigate this case. The individual did not travel outside Virginia prior to showing symptoms, which raises some concerns about local transmission. Reportedly, the patient had been in close contact with another Virginia resident who had been diagnosed with dengue virus after traveling internationally.

Dengue virus is transmitted through bites from infected Aedes mosquitoes. Health officials suspect that the local resident was infected by a mosquito that had previously bitten the internationally diagnosed patient, which seems to have resulted in this unusual local case.

Despite this incident, the VDH maintains that the risk of acquiring the virus locally remains low and they are keeping a vigilant eye on any further cases that may arise.

Symptoms of dengue can range widely. While some people might not show symptoms or only have mild ones, approximately one in every twenty will experience severe dengue, which can be quite serious. Symptoms to watch for include:

• Severe abdominal pain or tenderness
• Persistent vomiting (three or more times in one hour, or four times in six hours)
• Fluid accumulation, e.g., in the chest or abdomen
• Mucosal bleeding
• Altered mental state
• Liver enlargement
• Consistent increase in hematocrit (in at least two consecutive measurements taken six hours apart)

In light of this situation, healthcare providers are encouraged to take certain precautions:

• Inform patients about methods to prevent mosquito bites, which could reduce the risk of not just dengue but other mosquito-borne diseases like West Nile Virus.
• Aedes mosquitoes, the primary carriers of dengue, can breed in containers with just a small amount of standing water. Patients should be advised to remove any such water-holding containers around their homes.
• Always take a travel history from patients who present with acute fever. This can help identify the risk of dengue, especially in those who have not traveled.
• Even without a travel history, consider dengue in patients displaying acute febrile illness with common symptoms like muscle or joint pain, and eye pain.
• If you suspect dengue in someone without a travel history or other risk factors, contact your local health department immediately.
• Ensure diagnostic testing for suspected dengue cases is carried out.

For more detailed information, resources can be found on the Virginia Department of Health’s website.