<prompt> What is the recommended period of isolation for shigellosis?Until 1 negative stool culture.Until 2 consecutive negative stool culturesUntil 3 consecutive negative stool culturesNone of the above  <response>: In cases of shigellosis and salmenollosis, the recommended period of isolation is until 3 consecutive negative stool cultures. Ref: Park 21st edition, page 110-111. 