Objective To ascertain the causation of a pregnant woman with undefined pneumonia reported from the People´ s Hospital of Tongling city in Anhui province on November 2005. Methods Epidemiological and clinical information of the case was collected from the keypersons close to the case and referring to the medical record. A medical observation was carried out on the close contacts of the case and sick or dead poultry. Tracheal aspirates being collected were tested by both RT-PCR and real-time PCR to detect vi...

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