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 31: July 26 – Aug. 2-8, 2026
Rabies
- To date, 56 samples have been submitted for rabies testing and five have tested positive. In week 31, one bat was submitted for testing, testing negative.
- Statewide, 36 animals have tested positive for rabies.
- In 2025, seven bats tested positive in Boulder County.
Mosquitoes
- WNV transmission risk remains low throughout the region.
- Culex mosquitoes (WNV vectors) and total mosquito counts (all species) remained below the five-year average.
- Eighteen sample pools were submitted for WNV/SLE testing. Two pools tested positive; one pool collected from Orange Orchard/Niwot and another from collected from NE Longmont.
Plague/Tularemia/Hantavirus
- No specimens were submitted for plague or hantavirus this week.
