Metacercarial Infection of Wild Nile Tilapia (Oreochromis niloticus) from Brazil

Table 1

Measurements of metacercariae of four species of trematodes found in naturally infected specimens of Nile tilapia (Oreochromis niloticus) collected in Pampulha reservoir, Belo Horizonte, Minas Gerais, Brazil.

		Austrodiplostomum  compactum	Centrocestus  formosanus	Drepanocephalus sp.	Ribeiroia sp.
Cyst		—	220 ± 11 (191–239)	193 ± 7 (186–200)	432
		—	145 ± 10 (123–171)	125 ± 3 (121–128)	205
Free/excysted metacercaria		1,464 ± 70 (1,375–1,581)	—	—	623
		702 ± 59 (602–808)	—	—	201
Oral sucker		68 ± 7 (61–82)	—	—	85
		70 ± 6 (61–82)	—	—	83
Ventral sucker		NP	—	—	75
		NP	—	—	77
Tribocytic organ		345 ± 22 (300–375)	NP	NP	NP
		180 ± 17 (164–212)	NP	NP	NP

= length, = width, and NP = not present.