Mammomonogamusauris (Faust & Tang, 1934) Ryzhikov, 1948

ETYMOLOGY:Mammo (=mammal) and monogamus (for the finding of the worms in pairs of males and females); plus auris for ear.

SYNONYMS:Syngamusauris Faust & Tang, 1934

HISTORY: These worms were recovered from the middle ear of 11 of 48 cats during 1932 and the spring and fall of 1933. There have been no reports of this worm being recovered since the report of Faust and Tang in 1934.

GEOGRAPHIC LOCATION: Foochow, Fukien Province, China.

LOCATION IN HOST: Middle ear of the cat. All other species of Mammonogamus appear to be located within the trachea and larynx; thus, the location within the middle ear is surprizing.

PARASITE IDENTIFICATION: The males are orange red, 3.3 to 8.1 mm long, with delicate, subequal spicules. The females are blood red, 14 to 30 mm long; the vulva is 43% to 46% gbbeghind the anterior of the worm.. The adults are found consistently with the bursa of the male surrounding the vulva of the female; giving the worms a “Y-shaped” appearance. The eggs are 48 µm by 88 µm, with a thick, transparent sculptured shell that is in the 4 to 8 celled morula stage when laid.

LIFE CYCLE: Very little is known about the biology of these parasites. The eggs apparently pass down the eustachian tubes into the pharynx, are swallowed, and pass out in the feces.

CLINICAL PRESENTATION AND PATHOGENESIS: These parasites were not found attached to the wall of the middle ear; however, the mucosa was hemorrhagic. The typanic membranse of the cats were not injured.

TREATMENT: Not known.






Buckley JJC. 1934. On Syngamusierei sp. nov. from domestic cats with some observations on its life-cycle. J Helminthol 12:89-98.

Faust ECF, Tang Cc. 1934. A new species of Syngamus (S. auris) from the middle ear of the cat in Foochow, China. Parasitology 26:455-459.

Ryzhikov KM. 1948. Phylogenetic relationships of nematodes of the family Syngamidae and an attempt to reconstruct their systematics. Dokl Acad Nauk SSSR 62:733-736./






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