In fish from Phnom Penh Municipality, 2 species of metacercariae
(O. viverrini and H. yokogawai) were found. The metacercariae
of O. viverrini were collected from 37 (50.0%) of 74
fish (11 of 27 species), and the average number of metacercariae
per fish was 18.6. Among the 11 fish species positive for O.
viverrini metacercariae, Barbonymus schwanefeldi was the most
heavily infected, with the average intensity of infection per fish
of 74.6 metacercariae (Table 1). The metacercariae of H. yokogawai
were detected from 23 (57.5%) of 40 fish (5 of 27 species),
and the average number of metacercariae per fish was 21.0 (Table
2).
In fish from Pursat Province, 5 species of metacercariae (O.
viverrini, H. yokogawai, Haplorchis pumilio, Centrocestus formosanus,
and Procerovum sp.) were detected (Table 3). Total 3 O. viverrinimetacercariae were found in 2 fish species (Henicorhynchus
lineatus and Puntioplites falcifer). Total 51 H. yokogawai
metacercariae were detected in 8 (80%) of 10 P. falcifer examined.
A total of 476 H. pumilio metacercariae were collected
from 9 (90%) of 10 H. lineatus and 1 (50%) of 2 Pristolepis fasciata.
Only 1 C. formosanus metacercaria was detected in 1 (10%)
of 10 H. lineatus. Total 63 Procerovum sp. metacercariae were detected
in all 9 (100%) Anabas testudineus examined