Abstract: AIM:To diagnose a patient with clinical symptoms of fever,cough and asthma.ME-
THODS:The sputum of the patient was subjected to microscopic examination,and the clini- cal
pictures of the patientwas analysed.RESULTS:The red blood- like substance in the spu- tum was
preliminarily defined as parasitic nematodes.Species identification indicated that they were a
pair of Mammomonogamus laryngeusadult worms in copulation. The patient had obvious signs and
symptoms of respiratory tract infection and eosinophilia of peripheral blood. Detection of the worms or eggs is the main base for diagnosis. CONCLUSION: It is the first record of human Mammomonogamus laryngeus infection in China.

Key words: Syngam osis, Mammomonogamus laryngeus, respiratory disease