PORT-AU-PRINCE (AFP) - Stunned doctors said a 16-year-old Haitian girl was in a stable condition Thursday after surviving for 15 days buried in the rubble of the countrys earthquake-apparently with nothing to eat or drink. Nature always surprises us, said Claude Fuilla, the head medic with a French civil defense team in Haiti which pulled young Darlene Etienne from a collapsed building in the capital Wednesday. Neighbors found Etienne and alerted int'l rescuers who dug her out. She was stable but suffering from advanced dehydration and is now being treated on the French naval vessel. I am incapable of explaining it medically, but she told me this morning that she didnt eat anything, didnt drink anything and was trapped in the initial earthquake on January 12, said Evelyne Lambert, the chief doctor on board the Siroco. The girl is doing well and has managed to sleep, the doctor said. She has problems due to her prolonged immobilisation, her legs are painful but she has managed to move them, Lambert added. The first rescuers to reach Etienne initially thought she may have had access to soft drinks, but found no bottles at the scene when they checked later, doctors said. There were potentially some trickles of water, said Fuilla, adding that this had not been confirmed. When you review the literature, a hydrological fast longer than 10 days is extremely unusual. Doctors feared that her heart might stop at any moment because she was in such a sever state of dehydration when she was found. To my knowledge, she is one of the most extreme cases of survival, added Colonel Michel Orcel, a medic and veteran of natural disasters who runs the French field hospital in Port-au-Prince that treated Etienne immediately after her rescue. Rescuers have saved around 135 people from the debris since the 7.0-magnitude quake laid waste to much of Port-au-Prince and surviving towns. The government says around 170,000 were killed, at least 200,000 injured and a million left homeless. Etiennes ability to survive was partly down to luck, but also showed the sheer adaptability of the human body in times of crisis, doctors said. Physically she was very thin, but that is not inevitably a drawback as there is not much water in fat, said Orcel. The key comes from the brain which gradually adapts to the situation. It reduces the blood pressure and the kidneys partially shut down, he said. While the average person should consume around 1,500 calories a day, Darlene was probably only eating around an average of 300, like many in one of the western hemispheres poorest nations. There is always a limit but the body is capable of reducing its needs for survival, said Orcel. Victims generally fall into a state of hibernation, which makes them intermittently lose consciousness and allows them to pull through, he added.