Head of the team:
Csaba Székely,
Ph.D., fisheries engineer, scientific adviser, honorary professor
Founder of the team:
Kálmán Molnár,
DSc, DVM, retired scientific adviser
Members of
the team:
Gábor Cech, Ph.D student.,
biologist, junior research fellow
Györgyi Pataki-Ostoros,
fisheries engineer, technician
Erzsébet Csobai, biologist, trainee
The research projects of the team cover the following special fields of fish pathology:
| 1 | General parasitological survey of fish species cultured in farm-ponds or living in natural waters. Papers have been published on the parasite fauna of fish species living in the rivers Danube and Tisza as well as in Lake Balaton. |
| 2 | Studies on the development of the members of phylum Myxosporea belonging to Metazoa and the pathomechanism of diseases caused by them. The members of the research team have described and studied numerous new parasites and reported the intrapiscine developmental cycle of some important parasite species. Especially important results have been obtained in detecting the developmental stages of Sphaerospora sp., such as e.g. the description of C- and K-protozoans. The members of the team have made important statements about the host, organ and tissue specificity of these parasites. Their main works are the experimental studies of the life cycle of myxosporeans. |
| 3 |
Study
of the occurrence, species specificity and host adaptation of
fish-parasitic
coccidia. Many of the Goussia and Eimeria species
known
from fish have been described by the team. The electron microscopic
demonstration
of the epicellular, i.e. intracellular but extracytoplasmal, type of
development
typical of some of the fish coccidia, as well as the first
demonstration
of the paratenic host role of oligochaetes can also be attributed to
the
team. The host specificity and development of fish coccidia has been
studied
in laboratory experiments.
|
| 4 | Studies on monogenean infections. Numerous new parasite species have been described from Hungary and from other countries; papers have been published on the histological study of gill damage caused by monogeneans. |
| 5 |
Studies
on fish-parasitic nematodes. Regarding this group of parasites,
studies
have been done on members of the genera Philometra, Skrjabillanus
and Anguillicola. With respect to Anguillicola,
epizootiological,
pathological and histopathological studies have been published in
connection
with the massive eel mortality that took place in Lake Balaton. For
diagnosis
of Anguillicola infection X-ray examination and computer
tomography
has been applied. In an EU-project the role of anguillicolosis in the
decline
of European eel population is studied.
|
| 6 |
During
parasitological surveys two parasites, Atractolytocestus
huronensis
(Cestoda) in common carp and Sinergasilus lieni (Copepoda) in
silvercarp
and bighead were detected in Hungary. These Far-East origine,
introduced
parasites have been first found in Central Europe. The pathological
importance
of the two parasites has also been studied histologically.
|
| 7 | Studies on the relationship of adverse environmental factors and diseases caused by fish parasites. In the framework of this topic, research is being conducted in two main directions: (1) studies on the relationship between the severity of pollution in natural waters and parasitic diseases; (2) investigations into the effects of oxygen deficiency and pesticides on the development of certain parasitic diseases, e.g. dactylogyrosis, sphaerosporosis. |
| 8 |
Elaboration
of new treatment procedures against fish parasites. The team
members
have developed effective medication procedures against — among other
diseases
— pseudodactylogyrosis causing losses in intensive eel farms,
displostomosis
of herbivorous fishes, myxosporean infections.
|
|
|
Publications in pdf
update: 2009.VIII.26.