A 15-year-old American tourist has tested positive for swine flu after reporting sick in Mumbai,becoming effectively the citys third case and the states fifth,the other two having tested positive from Pune. She arrived in Mumbai on June 24,stayed for a day with a family she knew and was then admitted to Kasturba Hospitals swine flu ward early the next morning. She had complained of fever and cough and her tests returned positive from the National Institute of Virology in Pune on Friday, said Dr U Gawande,deputy director,state health services. The state is monitoring her primary contacts - the family she lived with and her co-passengers on board American Airlines. Nine members of the family she lived with have been screened and are put on lower doses of Tamiflu. Her co-passengers two rows ahead and behind her seat are yet to be traced, Dr Gawande added. Two more have been admitted for suspected swine flu. One is a man,aged 29,who returned from London and had contact with one of Punes two positive cases. He is admitted with a sore throat to Punes Naidu Hospital. The other suspected case is an 11-year-old Indian who had been to Lhasa and Florida for four days,returned on Thursday and was admitted to Kasturba Hospital early on Friday with fever and cough. Throat swabs of both have been sent to NIV, said Dr Gawande.