Trematodes of the Small Intestine
This is by far the largest group of trematodes found in the cat. Trematodes differ from other helminths in that they are often less discriminating in their requirements for a final host. For this reason, cats can harbor a large number of trematodes that they share with other animals that might eat the same intermediate hosts containing the arrested metacercarial stage. For example, if a trematode uses a fish as a second intermediate host, it might grow to adulthood in a cat, a dog, a piscivorous bird, an otter, or a raccoon. Thus, it is sometimes difficult to be certain whether the "true” final host is the cat or some other animal. Also, there are reports of worms being recovered on single or only a few occasions because cats are becoming infected when they accidentally ingest a metacercarial-containing meal meant for another host.
CYATHOCOTYLIDAE
Mesostephanusmilvi Yamaguti, 1939
Prohemistomum vivax (Sonsino, 1893) Azim, 1933
DIPLOSTOMATIDAE
Alariamarcianae (LaRue, 1917) Walton, 1949
Cynodiplostomumazimi (Gohar, 1933) Dubois, 1936
Fibricolaminor Dubois, 1936
Pharyngostomumcordatum (Diesing, 1850) Ciurea, 1922
ECHINOSTOMATIDAE
Echinochasminae
Echinochasmusperfoliatus (Ratz, 1908) Dietz, 1909
Echinochasmus breviviteilus Fahmy, Khalifa, Sakla, 1981
Echinochasmusliliputanus (Looss, 1896) Odhner, 1911
Episthmiumcaninum (Verma, 1935) Chatterji, 1954
Stephanoproradenticulatoides Isaichikoff, 1925
Echinostominae
Artyfechinostomumsufrartyfex (Schrank, 1788) Lühe, 1909
Isthmiophoramelis (Schrank, 1788) Lühe, 1909
Echinoparyphium Dietz, 1909
HETEROPHYIDAE
Apophallinae
Apophallus donicus (Skrjabin & Lindtrop, 1919) Cameron, 1936
Apophallusvenustus (Ransom, 1920) Cameron, 1936
Apophallusmuehlingi (Jägerskiöld, 1899) Lühe, 1909
Ascocotylinae
Ascocotyleascolonga (Witenberg, 1929) Travassos, 1930
Ascocotylelongicollis (Kuntz and Chandler, 1956) Soganderes-Bernal and Lumsden, 1963
Ascocotyleminuta Looss, 1899
Ascocotyleangrense Travassos, 1916
Ascocotylelonga Ransom, 1921
Ascocotyle pachycystis Schroeder and Leigh, 1965
Ascocotylearnoldoi (Travassos, 1928) Soganderes-Bernal and Lumsden, 1963
Centrocestinae
Centrocestuscaninus Leiper, 1913
Pygidiopsisgenata Looss, 1907
Pygidiopsissumma Onji and Nishio, 1916
Pygidiopsoidesspindalis Martin, 1951
Cryptocotylinae
Cryptocotylelingua (Creplin, 1825) Fischoeder, 1903
Cryptocotyleconcavum (Creplin, 1825) Lühe, 1899
Cryptocotylequinqueangularis (Skrjabin, 1923)
Euryheminthinae
Euryhelmissquamula (Rudolphi, 1819) Poche, 1926
Euryhelmismonorchis Ameel, 1938
Euryhelmispacifica Senger and Macy, 1952
Galactosominae
Galactosomum fregatae Prudhoe, 1949
Haplorchiinae
Haplorchispumilio (Looss, 1896) Looss, 1899
Haplorchisyokogawai (Katsuta, 1932) Chen, 1936
Haplorchistaichui (Nishigori, 1924) Witenberg, 1930
Haplorchissprenti Pearson, 1964
Haplorchisparataichui Pearson, 1964
Procerovumvarium Onji and Nishio, 1916
Procerovumcalderoni (Africa and Garcia, 1935) Price, 1940
Stellantchasmusfalcatus Onji and Nishio, 1916
Heterophyinae
Heterophyesheterophyes (Siebold, 1852) Stiles and Hassal, 1900
Heterophyesaequalis Looss, 1902
Heterophyopsis continua (Onji & Nishi, 1916) Tubangui & Africa, 1938
Metagoniminae
Metagonimusyokogawai (Katsurada, 1912) Katsurada, 1912
Metagonimustakahashii Suzuki, 1930
Dexiogonimusciureanus Witenberg, 1929
Stictodoriinae
Stictodorasawakinensis Looss, 1899
Stictodora thapari Witenberg, 1953 MICROPHALLIDAE
Microphalloidesvajrasthirae Waikagul, 1983.
PLAGIORCHIDAE
Plagiorchis massino Petrov & Tikhonov, 1927
NANOPHYETIDAE
Nanophyetus salmincola Chapin, 1928