The two districts had not reported coronavirus positivecases since April 5.
Seven samples from DK, sent on Tuesday for tests at thenew virology lab set up at Wenlock hospital here, turned outnegative.
Currently eight patients are under treatment in DKdistrict.
Four have been discharged from hospital after recovery,while 15 others are under observation.
In Udupi district also, all the samples of suspectedcases sent to the laboratory were found to be negative aftertests on Wednesday. MVGVS VS