Folia Parasitologica, vol. 45 (1998), issue 4

Sphingomyelin synthesis in helminths: a minireview

Ilia Bankov, Anna Timanova, John Barrett

Folia Parasitologica 45[4] 257-260 (1998)

Sphingolipids are a diverse and ubiquitous group of lipids. They are widely distributed in parasites and a number of novel forms have been described. Sphingolipid synthesis has been investigated in the malarial parasite, cestodes, digeneans and nematodes. Although there are differences in detail, the synthetic pathways involved are similar to those found in mammals.

Taxonomic problems, seasonality and histopathology of Henneguya creplini (Myxosporea) infection of the pikeperch Stizostedion lucioperca in Lake Balaton

Kálmán Molnár

Folia Parasitologica 45[4] 261-269 (1998)

Plasmodia of a Henneguya species measuring 70-900 µm and exhibiting season-dependent stages of development were detected throughout a three-year study on gill myxosporosis of Lake Balaton pikeperch (Stizostedion lucioperca (L.)). Sixty-five out of 160 fish (41%) examined in the period of study were infected by the parasite. Infection was the most prevalent (48%) among pikeperch specimens exceeding 40 cm in length. The highest prevalence of infection (58%) was recorded in 1995-1996 while the lowest (30%) in 1996-1997. The youngest plasmodia appeared in April, and started to develop within the capillaries of the secondary lamellae of the gill filaments....

The susceptibility of three-spined stickleback (Gasterosteus aculeatus), nine-spined stickleback (Pungitius pungitius) and flounder (Platichthys flesus) to experimental infections with the monogenean Gyrodactylus salaris

Arnulf Soleng, Tor A. Bakke

Folia Parasitologica 45[4] 270-274 (1998)

Three-spined stickleback (Gasterosteus aculeatus L.), nine-spined stickleback (Pungitius pungitius (L.)) and flounder (Platichthys flesus (L.)) are widespread teleosts, which all have behaviours involving migration between freshwater and brackish/sea water environments. Their importance in dispersal of the freshwater monogenean Gyrodactylus salaris Malmberg, 1957, which causes heavy losses of Atlantic salmon (Salmo salar L.) parr in infected Norwegian rivers, was tested indirectly by their susceptibility and resistance to the parasite in laboratory experiments. Gyrodactylus salaris attached to the three fish species, but no parasite reproduction was...

Five new species of Cichlidogyrus (Monogenea: Ancyrocephalidae) from Tilapia brevimanus, T. buttikoferi and T. cessiana from Guinea, Ivory Coast and Sierra Leone (West Africa)

Antoine Pariselle, Louis Euzet

Folia Parasitologica 45[4] 275-282 (1998)

Three species of cichlid fish, Tilapia brevimanus Boulenger, 1911, T. buttikoferi (Hubrecht, 1881), and T. cessiana Thys van den Audenaerde, 1968, from Guinea, Ivory Coast and Sierra Leone (West Africa) were examined for gill parasites for the first time. Six species of Monogenea were found of which one, Cichlidogyrus digitatus Dossou, 1982, had been previously described. Five new species, all belonging to the genus Cichlidogyrus Paperna, 1960, are described herein: C. albareti sp. n., C. hemi sp. n., C. nuniezi sp. n., C. bonhommei sp. n., and C. slembroucki sp.n.

Helminth parasites of the rare endemic catfish, Liobagrus reini, in Japan

Moravec, Nagasawa: Helminthsof Liobagrus František Moravec, Kazuya Nagasawa

Folia Parasitologica 45[4] 283-294 (1998)

Examinations of 29 specimens of the catfish Liobagrus reini Hilgendorf (Siluriformes: Amblycipitidae), a species endemic to Japan, collected from the Sho River, Toyama Prefecture, in central Honshu, revealed the presence of four species of helminth parasites: Plagioporus honshuensis sp. n. (Trematoda), Rhabdochona coronacauda Belouss, 1965, R. japonica Moravec, 1975 and Mexiconema liobagri sp. n. (all Nematoda). The new opecoelid trematode P. honshuensis is characterized mainly by the extent of vitelline follicles, the size ratio of the suckers (1 : 1.7-2.1), the situation of testes near the middle of the body and by the structure, size and shape of...

Nybelinia queenslandensis sp. n. (Cestoda: Trypanorhyncha) parasitic in Carcharhinus melanopterus, from Australia, with observations on the fine structure of the scolex including the rhyncheal system

Malcolm K. Jones, Ian Beveridge

Folia Parasitologica 45[4] 295-311 (1998)

A new species of Nybelinia Poche, 1926, N. queenslandensis sp. n. (Cestoda: Trypanorhyncha) is described from sharks, Carcharhinus melanopterus (Quoy et Gaimard, 1824) from the coast of northeastern Queensland, Australia. Morphological features of the 46 known species of Nybelinia Poche, 1926 are tabulated and the new species is differentiated from all known taxa that are adequately described on the basis of having a homeomorphous armature, metabasal hooks 20-25 µm long, tentacles 0.07-0.09 mm in diameter, short bulbs (0.38-0.45 mm) and craspedote segments with the testes encircling the female genital complex. The fine structure of the scolex...

Histochemical characteristics of Gyrodactylus derjavini parasitizing the fins of rainbow trout (Oncorhynchus mykiss)

Kurt Buchmann

Folia Parasitologica 45[4] 312-318 (1998)

Histochemical studies of enzyme activities and structural elements in Gyrodactylus derjavini Mikailov, 1975 parasitizing fins of Oncorhynchus mykiss Walbaum were conducted. Marked activities of non-specific esterase, acid phosphatase, alkaline phosphatase and amino-peptidase were found in the intestinal caeca of the parasite. A strong activity of acetylcholinesterase was seen in the nervous system. Extraintestinal non-specific and eserine-sulphate resistant esterase was localized in the distal part of the hamulus sheath. Activities of peroxidase and glucuronidase were not detected. In the embryo, developing hamuli were enclosed in a sheath rich in...

Borrelia-infection rates in tick and insect vectors accompanying human risk of acquiring Lyme borreliosis in a highly endemic region in Central Europe

Petr Zeman

Folia Parasitologica 45[4] 319-325 (1998)

The methods of spatial statistics were applied to assess the geographical pattern of risk of Lyme borreliosis in Central Bohemia, the Czech Republic, based on retrospective data on disease contractions. The statistical risk was then compared at 15 selected localities with the infection challenge presented by ticks and insects carrying borreliae. Over 5,000 Ixodes ricinus (L.) ticks and 390 haematophagous dipterans were screened by direct immunofluorescence method, and the spatial and seasonal variance of infection rates were studied. Infected ticks were found at each locality throughout the warm season; in nymphs, sample infection rates ranged from...

Carp coccidiosis: Longevity and transmission of Goussia carpelli (Apicomplexa: Coccidia) in the pond environment

Dieter Steinhagen, Katharina Hespe

Folia Parasitologica 45[4] 326-328 (1998)

Hysterothylacium nipponense nom. n. (Nematoda: Anisakidae) for H. japonicum Moravec et Nagasawa, 1998 preoccupied by Hysterothylacium japonicum Rajyalakshmi, 1996

František Moravec, Kazuya Nagasawa

Folia Parasitologica 45[4] 328 (1998)

In vitro growth on different cell lines of four microsporidial species infecting humans

Alessandra Ludovisi, Patrizia Rossi, Agnese Mochi Onori, Edoardo Pozio

Folia Parasitologica 45[4] 329-331 (1998)

Echinococcus multilocularis (Cestoda: Taeniidae) in the Czech Republic: The first detection of metacestodes in a naturally infected rodent

Karel Martínek, Libuše Kolářová, Jaroslav Červený, Michal Andreas

Folia Parasitologica 45[4] 332-333 (1998)