Another mosquito-borne virus has been confirmed to infect humans, after a report published in June from the peer-reviewed medical journal Clinical Infectious Diseases. Keystone has been known to infect animals since its discovery in Tampa-Bay area in 1964 but has never before been seen in a human case.
Keystone is a California-serogroup orthobunyavirus that causes rash, mild fever, and encephalitis that is spread from mosquitos, cousin to the Zika Virus.
Keystone antibodies have been suggested to exist in 20% of the population in the Tampa Bay area of Florida, and one of the report’s research author J Glenn Morris, JR suggests that the pathogen has existed in humans without diagnosis for decades.