, but there is no sign that the public has been exposed.The bird flu virus was found as part of routine tests at live bird markets around the state by the California Department of Food and Agriculture. Market employees who had been in close contact with the birds were monitored and didn't report any symptoms after a 10-day period, said San Francisco Director of Health Dr. Grant Colfax in a report that appears on Tuesday's health commission agenda.
'It is possible that the H5N1 fragments detected in wastewater originated from birds or other animals due to San Francisco's unique combined sewer system that collects and treats both wastewater and stormwater in the same network of pipes,' according to the report from the health department. San Francisco is the only city in California thus far with a positive H5N1 detection.