fish diseases

..These results suggest that this positive association is related to a third common factor, i.e., their host's life cycle...

..These results reproduce phenomena observed in the field, indicating that the experimental infection system could be employed to study infection dynamics and host-parasite interactions under controlled conditions...

..This is the first record of monogeneans parasitic on the gills of B. cephalus...

..Pinocytic canals and points of phagocytosis were observed in the wall. The prevalence of the parasite varied according to host size, with the lowest prevalence occurring in hosts up to 10 cm long...

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..The possible adaptive significance of the migratory behaviour, site-specificity and its link with changes in parasite development are discussed...

..sp. differs from all known Heteroplectanum species in the shape and size of the squamodiscs, the arrangement of the sclerites in the squamodiscs, the extremely large ventral bar and the short, curved, non-spinous copulatory tube...

..The contrasting egg-laying patterns of H. heterocerca and B. seriolae suggest that each species makes use of a different infection strategy to infect the same host species, S. quinqueradiata...

..chrysophrii showed better reproductive capacity on a new host (sharpsnout bream). Both cases point to the possible enlargement of parasite host range...

..A comparison of the sequence of the ssu rDNA from P. pseudobranchicola with that of other myxozoans shows that it groups closely together with P. unicornis and P. asymmetrica. The closest relative to this group is P. minibicornis...

..Girdles should be routinely examined to estimate the actual intensity of infection and to maximize the likelihood of finding this species of digenean...

..The parasite was found throughout the period studied and its prevalence was unaffected by host size, season or water properties...

..This is supported by reviewing aquaculture development in countries endemic for foodborne trematodiasis over the past 10-50 years. Future and sustainable control of foodborne trematodiasis is discussed...

..pumilio, Procerovum sp., and O. viverrini metacercariae in Vietnamese fish. These results indicate that consumption of improperly prepared fish represents a significant risk of acquiring FZTs in this south Vietnam region...

..Ultrastructure of the clamps of both species described aid in understanding of the parasite habitat and survival...

..Atlantic salmon sampled at the same time from the farms were only affected by amoebic gill disease and isopods...

..okamotoi...

..However, significant differences in prevalence and abundance were found in relation to date of sampling for P. minor, and all parasites were aggregated in their distribution...

..Our findings represent the first known species of Urocleidoides from these fishes in Central America and demonstrate that they are morphologically linked to their South American congeners...

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..The new genus and species are distinctive within the Acanthocolpidae for the combination of the absence of enlarged spines around the oral sucker, a blind ending H-shaped intestine and a deeply lobed ovary...

..Before we can develop successful management strategies the knowledge gaps in understanding the disease cycle and the exact pathogenesis of PKD need to be closed...

..Histopathology was a very insensitive indicator of WD. The PCR test was highly specific and was used to differentiate spores of M. cerebralis from similar spores of other species...

..The capsulogenic cells in early sporoblast had large amounts of rough endoplasmic reticulum but had a few Golgi apparatus...

..These cues differ from those used in other fish parasites studied to date and underline the diversity of fish recognition strategies...

..Metacercariae were embedded in the caudal muscles of fish and heavy infections induced mortality. Metacercariae were infective at about 15 days of age...

..About 100 references are cited...

..We review the history and current status of the epidemic, and current strategies for elimination of the parasite from Norway. Finally, we consider opportunities for further spread of the parasite within and beyond Europe...

..seriolae and Z. seriolae and discusses the inclusion of basic parasitic life-cycle parameters into management strategies designed to maximise treatment efficacy and limit monogenean epizootics in sea-cage kingfish culture...

..platymetopon is the most abundant fish species and has the highest C. complanatum prevalence, which makes it the most likely path of transmission to the bird, the definitive hosts of C. complanatum...

..In this system, the site of encystment within the fish host both promotes and constrains the adoption of a facultative, truncated life-cycle by the parasite...

..Location-dependent occurrence of D. crucifer and D. difformis indicated that the exchange between fish groups from the eastern and western parts of the lake is limited...

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..These results indicate that only seventeen out of the 150 or so digenean families are reported in the deep sea...

..ijimai and A. conchicola. However, microridges in the trough of the folds in the neck region and numerous small pits on the upper part of the septa were found exclusively in A. ijimai, but uniciliated sensory papillae in A. conchicola...

..According to our research there are two species of trematoda of genus Aporocotyle: A. simplex and A. theragrae in the far eastern seas...

..Potential applications of the method in fish farming and parasitological studies are discussed...

..The possibility that uncharacteristically low water temperatures led to the outbreak is discussed...

..Morphometric differences between this parasite and other species of the genus Henneguya indicated, that the parasite observed in A. altiparanae is a new species. This is the first report of a myxosporeanparasitizing A. altiparanae...

..The spores differed from those of previously described species. Based on spore morphology, it is concluded that this species belongs to the family Myxobolidae, genus Henneguya, and that it constitutes a new species: H. astyanax n. sp...

..Myxobolus peculiaris n. sp. was very different when compared to other species of Myxobolus in its morphology and the biggest size of spore body. The authors present tables with comparative measurements of Brazilian myxozoan parasites...

..9 microm width, and an isofilar polar filament with 11 to 12 turns obliquely to the longitudinal axis; (smaller): 4.6 microm length, 2.8 microm width, and an isofilar polar filament with 4 to 5 turns, obliquely to the longitudinal axis...

..2 (3-5) microm wide, and the polar filament formed 6 coils slightly obliquely to the axis of the polar capsule. An intercapsular appendix was present. There was no mucous envelope or distinct iodinophilous vacuole...

..Although the Lule salmon seems more susceptible to infection compared to previous reports on the Neva salmon, the results support the notion that Baltic salmon strains are generally more resistant than East Atlantic salmon...

..Furthermore, replication occurred at 6-21 degrees C, suggesting a host range confined to cold-blooded animals...

..Although several other non-specific and cellular factors are likely to be involved in controlling parasite numbers, it cannot be excluded that antibodies could be involved in mediating the observed partial immunity...

..Morphological and molecular analyses of the myxozoan from splendid alfonso identified it as K. thyrsites, which has been described from many marine fishes. To our knowledge, this is the first record of K. thyrsites in splendid alfonso...

..minithyrsites n. sp. on its fish hosts are unknown, both K. thyrsites and K. amamiensis are associated with flesh quality problems in some cultured species and may be potential threats to an expanding aquaculture industry in Australia...

..lianoides n. sp.) was found in the gall bladder of Stichaeus grigorjewi. Ceratomyxa spp. have not been previously described from P. azonus or S. grigorjewi...

..salaris on the tail fins of the East Atlantic strains and rainbow trout were found during the course of infection, whereas the two Baltic salmon strains experienced a decreasing percentage of parasites in this microhabitat...

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..gotoi and relatively large testes. This is the first record of the genus Capsala from Arabian Gulf fishes and E. affinis is a new host record...

..For comparison, illustrations of the ventral bar and the male copulatory organ of all Mediterranean species of the "ignoratus" sub-group are provided. The question of the host specificity of L. ignoratus is discussed...

..The gill parasites from S. fuscescens are tentatively assigned to P. mamaevi pending new collections and restudy of microcotylid species from siganid fishes...

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..Polylabris angifer Hussey, 1986, 1-2 worms per fish from the gills. (2). Polylabris sp. only one worm from the gills. As far as it can be concluded. this is a new locality and new hosts of the four species of worms...

..Lamellodiscus gussevi Sanfilippo (1978) et Lamellodiscus abbreviatus Sanfilippo (1978) are considered as nomina nuda...