In the Raleigh-Cary metro area and surrounding Wake County suburbs, the primary concerns are:
West Nile Virus (WNV): This remains the most prevalent mosquito-borne disease in the region. Recent data indicates a general upward trend in cases across the Piedmont, with Wake County frequently reporting human infections. Transmission typically involves Culex mosquitoes, which thrive in urban and suburban catch basins and stagnant water.
La Crosse Encephalitis (LACV): While historically more common in Western North Carolina, cases have been documented in the central part of the state. It primarily affects children and is transmitted by the Eastern Treehole mosquito.
Eastern Equine Encephalitis (EEE): Although rarer in the Piedmont than the coastal plains, EEE is a serious concern due to its high mortality rate in both humans and horses.
North Carolina consistently reports some of the highest rates of tick-borne illness in the United States. In Wake County, the risks include:
Rocky Mountain Spotted Fever (RMSF): Transmitted by the American Dog Tick, this is highly endemic to the Wake County area. It is a serious bacterial illness that requires early medical intervention.
Lyme Disease: Once considered rare in the South, the Blacklegged Tick (Deer Tick) has expanded its range. Wake County now sees a steady number of Lyme cases annually as these ticks migrate through the Piedmont corridor.
Ehrlichiosis: Primarily spread by the Lone Star Tick, which is the most aggressive and common tick species found in North Carolina residential yards.
Alpha-gal Syndrome: A red-meat allergy triggered by the bite of a Lone Star Tick, which has seen increasing diagnoses in the Triangle region.
The Urban-Suburban Interface
As residential developments expand into previously wooded areas in towns like Apex, Holly Springs, and Wake Forest, humans and pets are brought into closer contact with the natural hosts of these diseases, such as white-tailed deer, white-footed mice, and birds.
Environmental Reservoirs
Pine Straw and Leaf Litter: A staple of Raleigh landscaping, pine straw provides the perfect insulated microclimate for ticks to survive dry spells.
Drainage and Construction: The clay-heavy soil of the Piedmont often leads to poor drainage. Construction in growing areas can create temporary pools of standing water, providing ideal breeding grounds for Mosquitos.
