Discipline: Veterinary Medicine
Domesticated mallard ducks (Anal platyrhynchos platyrhynchos Linnaeus, 1758) from four provinces in Luzon including Metro Manila were examined for trematode parasites at irregular intervals throughout the years but majority from the provinces of Rizal and Camarines Sur. Twelve species were recovered and identified representing five families as follows: Prostogonimus pseudopellucidus, P. putschoskowsski, P. cuneatus (Prosthogonimidae); Stellanthchasmus falcatus (Heterophyidaye); Notocotylus intestinalis and Notocotylus attenuatus (Notocotylidae); Pseudechinostomum indicum Echinostoma revolutum, Echinoparyphium recurvatum, (Echinostomatidae): Psilochasmus longicirrratus Paraphystomum carbonis and Psilorchis thapari (Psilostomadae). Stellantchasmus falcatus, is recorded for the first time in a bird, extending the host range of this trematode of public health importance locally. Prosthogonimus putschkowsskii, Pseudechinostomum indicum, Paryphistomum carbonis, Psilorchis thapari and Notocotylus attenuatus are reported for the first time in the Philippines constituting new locality record for the species. Likewise the genera, Pseudechistomum, Paryphistomum and Psilorchis are recorded for the first time in the country.