In the hillstation of Panchgani, the health authorities have launched a 'combing operation' in all the 16 top residential public schools to detect swine flu cases after 16 students tested positive Monday.

Satara district health chief Vijaysinh Mohite said after Monday's 16 positive cases in Panchgani's St. Peter's High School, a health team has begun combing operations to detect more such cases.

'Our health team is going around all the 16 residential public schools which house over 5,000 students, and we are checking them all for swine flu symptoms,' Mohite told IANS.

In Gurgaon, Haryana, a woman and a a teenage girl contracted the disease from a person who had the virus earlier.

In Kozhikode, Kerala, an 18-year-old girl, who travelled from Bahrain and reached the city July 26, was detected with the virus infection at the airport.

In Thiruvananthapuram, a one-year-old boy who had returned from London and reached the Kerala capital July 19, tested positive for the flu. On July 26, the infant showed flu-like symptoms and was admitted to the hospital.

In Amritsar, a 19 year-old boy, who had come from Malaysia and had reached Delhi on July 24, was detected with the flu. On reaching Delhi, the teenager had reached the Punjab city by train on July 25. The next day, he showed flu-like symptoms and was admitted to the hospital.