UC Davis disputes that they requested on the 19th this patient was at another hospital already came to UCD already in a ventilator on 19th they wanted to test then. Clearly they show the buck being passed back and forth till the 23rd.
https://www.google.com/amp/s/www.wired.com/story/community-spread-coronavirus/amp
The UC Davis memo explains the delay in testing by noting that neither Sacramento County nor the city of Davis’ public health agency performs the test. The hospital had to request the CDC do it. “Since the patient did not fit the existing diagnostic criteria for Covid-19, a test was not immediately administered,” the memo says. On Sunday the CDC did the test, and UC Davis put the patient on more stringent airborne and contact infection control precautions. “Today the CDC confirmed the patient’s test was positive.”
The UC Davis memo is very vague and really doesn’t contradict what the CDC said at the press briefing. The CDC was very specific today saying that they responded to the request and tested the patient on the same day.