Cestóides Pseudophyllidea parasitos de congro-rosa, Genypterus brasiliensis Regan, 1903 comercializados no estado do Rio de Janeiro, Brasil

Diphyllobothriidae

“…The cases in Brazil have been mainly related to the consumption of raw, smoked or insufficiently cooked imported salmonids. However, the presence of Diphyllobothrium plerocercoids in marketed marine fish, such as the pink cusk-eel, Genipterus brasiliensis, has been reported (Knoff et al, 2008). Recently, A. pacificus has been identified in the South American fur seal, Arctophoca australis (syn.…”

Cestodes Diphyllobothriidea parasitizing blackfin goosefish, Lophius gastrophysus Miranda-Ribeiro, 1915

“…The larvae observed so far were similar to D. dendriticum, with a pseudo-segmented rugose body, with conspicuous developing genital apparatus in most of the specimen, that were 4.0-2.29 (1.30) cm long, 0.13-0.29 (0.17) cm wide, scolex 0.065-0.13 (0.10) cm long and 0.067-0.16 (0.12) cm wide, bothrial swelling 0.04-0.10 (0.16) cm long, microtriches 7.5-11.25 (10) µm long, different from the presently observed material shared closest characteristics with D. latum. Cases of human infection with diphyllobothriid cestodes of the Diphyllobothrium genus, mainly D. latum, have been reported in Brazil, with the statement that the transmission of diphyllobothriasis has occurred after the ingestion of raw, poorly cocked or smoked fish meat (Knoff et al, 2008;Mezzari and Wiebbelling, 2008). It reinforces the importance of the study of larval cestodes in Brazilian fishe, since in the present investigation, the plerocercoid larva was found alive in the host, thus permitting to observe the movement and extroversion of the scolex within the bothrial region, that became evident and pointed, Figure 1.3 a-d, making it very similar to the plerocercoid of D. latum that is shown in Andersen et al (1987).…”

“…Recently, Knoff et al (2008), observed larval Diphyllobothrium cestodes in the cusk-eel, Genypterus brasiliensis Regan, 1903. The larvae observed so far were similar to D. dendriticum, with a pseudo-segmented rugose body, with conspicuous developing genital apparatus in most of the specimen, that were 4.0-2.29 (1.30) cm long, 0.13-0.29 (0.17) cm wide, scolex 0.065-0.13 (0.10) cm long and 0.067-0.16 (0.12) cm wide, bothrial swelling 0.04-0.10 (0.16) cm long, microtriches 7.5-11.25 (10) µm long, different from the presently observed material shared closest characteristics with D. latum.…”

“…The classification of marine Diphyllobothrium species is somewhat confusing and the descriptions of Diphyllobothrium species of plerocercoids, whenever available, are incomplete (Andersen et al, 1987) and thus, require detailed morphological and morphometric studies of these larval forms. Diphyllobothrium latum (Linnaeus, 1758), D. dendriticum (Nitzsch, 1824) and D. pacificum (Nybelin, 1931) are the species referred in South America, causing diphyllobothriasis (Knoff et al, 2008) and their plerocercoid larvae, when compared, to show morphological differences other than the maximum total length. Other relevant aspects may be taken into consideration, such as the morphological aspect of the tegument surface, the length of the microtrichies, the format of the scolex, the degree of its invagination, the histological arrangement of the muscular bundles, and even the infection site (Dick and Poole, 1985).…”

“…larvae parasitizing specimens of L. gastrophysus in Brazil can be harmful whenever fishe are inadequately ingested by consumers. Prevention methods related to human diphyllobothriasis already considered by Knoff et al (2008) are priority and must be reported not only to the customers but also to fishermen and merchants. …”