Lethal effects of praziquantel and albendazole, on the cercariae of sp. (Dietz, 1909) in-vitro.

Echinochasmidae are considered one of the digenean intestinal parasites of carnivorous mammals and humans. Some larvicidal medications, such as praziquantel and albendazole, were employed to interrupt the life cycle of Echinochasmidae, which may cause harmful and serious effects on the domestic fish, ducks, and humans in our ecosystem. Cercariae of sp.

Comparative topography and ultrastructure of tegument in a polyopisthocotylean parasite (Metamicrocotyla cephalus) and a monopistho-cotylean parasite (Dactylogyrus extensus).

Comparative topography and ultrastructure was done for the tegument architecture between a polyopisthocotylean parasite (Metamicrocotyla cephalus) and a monopisthocotylean parasite (Dactylogyrus extensus) for the first time. The result showed that the tegument of M. cephalus is characterized by many foldings producing closely packed annular corrugations superimposed with a complex configuration of many robust papillae bearing microvillus-like projections, thin terminal web just underneath the apical plasma membrane, membranous projections from the basal plasma membrane inside the syncytium, one type of tegumental cell producing two tegumental secretory bodies inside the syncytium (electron-lucent bodies "ts1" and electron-dense bodies "ts2") and the syncytium is thick (l.

Mode of attachment of a polyopisthocotylean parasite, Metamicrocotyla cephalusto the gills of Mugil cephalus through the study of haptoral compartments.

The monogenean parasite, Metamicrocotyla cephalus uses the ventrally located haptor provided with two symmetrical rows of clamps in its attachment to the middle regions of the gill filaments of Mugil cephalus. Several factors are reported that protect the parasite from dislodgement by the breathing water current of the host. Firstly, the body of adult parasite produces 45 degrees with the longitudinal axis of the gill filament and its length is nearly equal to the free distal region of the filament located anterior to the site of attachment.