Summary This annual report summarizes operations, disease surveillance, and health education activities conducted by MVCP in 2017. The report provides an overview of vector control activities and analyzes the level and distribution of MVCP services throughout the county.Zika Short-Term GrantImproving Data CollectionAdvancement in Aedes SurveillanceOutreachMonitoring Inaccessible AreasThe majority of San Bernardino Countys 20,105 square miles is rural and inaccessible but still requires mosquito surveillance and, in some instances, abatement. SBCMVCP utilizes off road vehicles to identify, inspect, and treat areas that are inaccessible by truck. The Santa Ana River is a key example as it runs through huge population centers under the jurisdiction of the SBCMVCP. Within the borders of San Bernardino County, the Santa Ana River winds approximately 15 miles from the Seven Oaks Dam in the City of Highland to the City of Grand Terrace. When the river bed is exposed, standing water accumulates and creates an environment for mosquitoes to thrive. To mitigate this issue, SBCMVCP staff have been trained and certified in the safety and operation of ATVs for mosquito surveillance and abatement in these remote locations. In 2017, a hidden water source measuring approximately one hundred square feet was discovered in the Santa Ana Riverbed between Waterman Avenue and South E Street. The Culex mosquito, known for carrying West Nile Virus, was found breeding at this site. The SBCMVCP staff used ATVs to access the water source to apply a mix of oil and Vectomax granules to kill off any mosquito larvae.