Weekly Animal-Borne Disease Reporting
The Boulder County Public Health Vector Control Program aims to prevent the spread of disease from vectors (animals) to humans.
Week 29: July 19 – 25, 2026
Rabies
- To date, 50 samples have been submitted for rabies testing. Three have tested positive. In Week 29, seven bats and one skunk were submitted for testing, 1 bat tested positive.
- Statewide, 29 animals have tested positive for rabies.
- In 2025, seven bats tested positive in Boulder County.
Mosquitoes
- Boulder County has reported our first WNV human case of 2026. The case is non-neuroinvasive. Two neurological cases of WNV have been reported this season in Colorado, one in Larimer County and one in Jefferson County.
- Culex mosquitoes (WNV vectors) and total mosquito counts (all species) remained below the five-year average.
- Seventeen sample pools were submitted for WNV/SLE testing. All tested negative.
Plague/Tularemia/Hantavirus
- No specimens were submitted for plague or hantavirus this week.
