الفهرس 
MATERIALS AND METHODS
Lecithochirium aegyptiacus n. sp.Only 14 pages are availabe for public view
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Abstract
Parasitic infestation is greatly found in marine and freshwater
fishes of Egypt. During the present study, a total of 1000 marine
and freshwater fish belonging to 12 families; Cichlidae,
Synodontidae, Mullidae, Moronidae, Sparidae, Mugillidae,
Soleidae, Carangidae, Centropomidae, Serranidae, Lutjanidae and
Clupeidae have been examined for internal helminthes. The hosts
were collected from three areas at Egypt; Manzala lake at
Damietta, Mariout lake at Alexandria and Brullus lake at Kafr El-
Sheikh province during the period from 2011 to 2014.
A total of fourteen species of endoparasites were identified
and described using light microscope. Those species are: eight
digenean trematodes; Lecithochirium fusiforme Lühe, 1901,
Lecithochirium aegyptiacus n. sp., Tubulovesicula nagatayi n. sp.,
Pseudopecoelus mullatus n. sp., Azygia hwangtsiyui Tsin, 1933,
Hemiurus sardinai n. sp., Elytrophallus manteri n. sp. and
Elytrophalloides oatesi Szidat, 1955. Two nematodes; Hedruris
lutjanenses n. sp. and Philonema oncorhynchi Kuitunen-Ekbaum,
1933. Four acanthocephalans; Serrasentis yamaguti n. sp.,
Gorgorhynchus alexandrinus n. sp., Longicollum mugelli n. sp.
and Rhadinorhynchus sp. Lühe, 1911. Three species of the above
mentioned were described using Scanning Electron Microscope;
Hedruris lutjanenses n. sp., Philonema oncorhynchi Kuitunen-
Ekbaum, 1933 and Gorgorhynchus alexandrinus n. sp. Some
new hosts and geographical records were established in the
present study.
The endoparasitic community had an overall prevalence
(34.2%) and mean intensity of 2.94. A comparison between the
infection by helminthes in the three studied areas was estimated
and discussed. Mariout lake had the highest infection rate by helminthes (38.4%) followed by Manzala (34.5%) and the lowest
infection rate was recorded in Brullus lake (27.2 %).
The helminthic community in the present study was dominated
by trematodes (56.14%) followed by acanthocephalans (25.14%)
and the lowest incidence was recorded for nematodes (24.56%).
The effects of modifying factors such as season, weight and sex
of the hosts on the abundance of parasites were also illustrated
and discussed in the present survey using statistical studies. The
seasonal incidence of the total parasite species showed maximum
prevalence during summer (46.8%) while the lowest infection rate
was recorded during fall season (25.5%). Males had the higher
infection rate (55%) than females (45%).
The histopathological and histochemical impacts due to the
infection by the nematode Philonema oncorhynchi Kuitunen-
Ekbaum, 1933 and acanthocephalan Longicollum mugelli n. sp.
on some organs of Lates niloticus and Mugil cephalus fish were
studied. Also, the haematological effects in the infected previous
fish species were illustrated and compared with noninfected hosts.