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It found evidence of “severe bilateral acute pulmonary edema” and “frothy pulmonary edema in trachea and mainstem bronchi.”

Reese underwent emergency surgery, but the damage continued even after the battery had been removed, burning a hole through her esophagus and trachea, her mother said.

The researchers discovered high levels of virus in the animals' nasal passages, trachea and lungs and moderate-to-low virus levels in other organs, consistent with H5N1 infections found in other mammals.

They are called noninvasive because they don’t require trachea surgery to open the airway, like ones used in hospitals.

The larynx functions like an antechamber to the windpipe, or trachea, with a flap of tissue called the epiglottis keeping food and drink from falling down the windpipe.