New Delhi: Health authorities have stepped up airport screening, passenger monitoring and quarantine measures after suspected Ebola cases in Bengaluru and Gujarat, though no infections have been confirmed in India so far.A 28-year-old Ugandan woman, who was quarantined in Bengaluru on suspicion of Ebola infection, has tested negative for Ebola, a relief amid heightened concern over the latest outbreak in parts of Africa.Officials said airport health organization teams are directly contacting passengers arriving from affected countries.They are also isolating individuals with mild symptoms as a precaution.“Even if someone complains of a minor headache, we do not want to take any risk and are keeping such persons in isolation,” an official said, adding that the samples are being sent to the National Institute of Virology for testing.Officials said the test report of the 37-year-old man, who had reportedly traveled through the African continent and Bangladesh before reaching Mumbai and later Vadodara with two associates, would come soon.According to health officials, the man developed symptoms of fever, cold and cough and was admitted to a private hospital in Vadodara before being shifted to the isolation ward of the civil hospital after his travel history was revealed during screening.The patient, his two colleagues and a doctor who came in professional contact with him have been kept under observation as a precautionary measure, officials said.Officials stressed that there are no confirmed cases of Ebola in Gujarat or anywhere in India and appealed to people not to spread rumors or misinformation on social media. The Union Health Ministry said surveillance has been stepped up at airports and hospitals, with quarantine measures initiated wherever travelers from affected African regions report mild symptoms. Officials said India is on high alert and all screening, isolation and testing protocols are being done in line with WHO guidelines.