Delhi: The Central Zoo Authority sounded a red alert for all zoological parks in India and told them to collect testing samples of animals on a fortnightly basis, after a tiger at the Bronx Zoo of New York in USA was tested positive for the corona virus. In a letter to all states and Union Territories, Central Zoo Authority Member Secretary SP Yadav advised all zoos to remain “on highest alertness” and monitor animals round-the-clock using CCTVs for any abnormal behaviour or symptoms. The Central Zoo Authority said mammals, especially cats, ferrets and primates, need to be carefully monitored and fortnightly samples of suspected cases should be sent to designated animal health institutes for Covid-19 testing. “Sick animals should be isolated and quarantined,” it added. The samples can be sent to the National Institute of High Security Animal Disease in Bhopal, the National Research Centre on Equines in Haryana’s Hisar and the Indian Veterinary Research Institute in Bareilly, Uttar Pradesh, the letter said.