The 25-year-old Krishna, who was named in the Indian squad for the England tour as a stand-by on Friday, is the fourth KKR player to have contracted the dreaded virus.
The opening batsman, currently in Ahmedabad, will be flown to Chennai where he will undergo treatment.
Dhoni is the second Indian cricketer after CSK teammate Ravindra Jadeja to keep a horse as pet.
The Australian pacer said that the T20 World Cup should be held in India only if it is not going to be a drain on the country's resources in its fight against the COVID-19 pandemic.
"The moment we heard that, when players are testing positive, inside the bubble, then everyone starts asking questions. The alarm bells definitely started going off for all of us," said the Rajasthan Royals all-rounder.
Hussey and Balaji were among the prominent non-playing staff to test positive when the IPL was "indefinitely suspended" on Tuesday, following multiple COVID-19 cases inside the bio-bubble.
The former India captain told his teammates in a virtual meeting that foreign players and support staff should be given preference to travel first as the tournament was taking place in India.
Khandwawala said the ACU will now direct state cricket associations to be more careful while employing staff on temporary basis.
The two individuals have been booked for cheating and breaching COVID-19 norms.
Cummins, a key part of the Kolkata Knight Riders team, said the previous edition held in the UAE was incredibly "well-run" and the organisers pushed it "little step further" by organising it at home this year.