Folia Parasitologica, vol. 50 (2003), issue 1


Tomáš Scholz

Folia Parasitologica 50[1] 1-2 (2003) | 10.14411/fp.2003.001

Spermidine metabolism in parasitic protozoa - a comparison to the situation in prokaryotes, viruses, plants and fungi

Annette E. Kaiser, Andrea M. Gottwald, Carolin S. Wiersch, Walter A. Maier, Hanns M. Seitz

Folia Parasitologica 50[1] 3-18 (2003) | 10.14411/fp.2003.002

Targeting polyamines of parasitic protozoa in chemotherapy has attracted attention because polyamines might reveal novel drug targets for antiparasite therapies (Müller et al. 2001). The biological function of the triamine spermidine in parasitic protozoa has not been studied in great detail although the results obtained mainly imply three different functions, i.e., cell proliferation, cell differentiation, and biosynthesis of macromolecules. Sequence information from the malaria genome project databases and inhibitor studies provide evidence that the current status of spermidine research has to be extended since enzymes of spermidine metabolism are...

Long-lasting anticryptosporidial activity of nitazoxanide in an immunosuppressed rat model

Xunde Li, Philippe Brasseur, Patrice Agnamey, Denis Leméteil, Loïc Favennec, Jean-Jacques Ballet, Jean-François Rossignol

Folia Parasitologica 50[1] 19-22 (2003) | 10.14411/fp.2003.003

Cryptosporidium parvum, Tyzzer, 1912 is identified as a common cause of diarrhoea in immunocompetent individuals. In immunocompromised, especially HIV-infected subjects, cryptosporidiosis causes severe chronic diarrhoea. In this study, nitazoxanide (NTZ) was compared for curative activity with sinefungin (SNF) and paromomycin (PRM) in immunosuppressed rats, a screening model for anticryptosporidial agents. NTZ at either 50 mg/kg/day, 100 mg/kg/day or 200 mg/kg/day resulted in seven days in a dose-dependent inhibition of oocyst shedding similar to that obtained with SNF (10 mg/kg/day) and PRM (100 mg/kg/day). Further discontinuation of SNF or...

Description of Eimeria arabukosokokensis sp. n. (Apicomplexa: Eimeriidae) from Telescopus semiannulatus (Serpentes: Colubridae) with notes on eimerian coccidia from snakes of Eastern Kenya

Jan R. Šlapeta, David Modrý, James Ashe, Břetislav Koudela

Folia Parasitologica 50[1] 23-30 (2003) | 10.14411/fp.2003.004

Parasitological examination of faeces of 26 snakes kept in Bio-Ken Snake Farm, Watamu, Kenya revealed new species of Eimeria Schneider, 1875 in Telescopus semiannulatus Smith, 1849. Oocysts of Eimeria arabukosokokensis sp. n. are cylindrical 26.8 (25-29) × 15.1 (14-16) µm with smooth, bilayered oocyst wall and a single polar granule. The broadly ellipsoidal sporocysts average 9.3 (8.5-10) × 7.1 (6.5-7.5) µm and possess single-layered wall composed of two plates joined by longitudinal suture. Caryospora cf. regentensis Daszak et Ball, 2001 is reported from Dendroaspis angusticeps (Smith, 1849) and two additional...

Infection in the fins of the goldfish Carassius auratus caused by Myxobolus diversus (Myxosporea)

Kálmán Molnár, Csaba Székely

Folia Parasitologica 50[1] 31-36 (2003) | 10.14411/fp.2003.005

During health surveys of 7- to 9-week-old goldfish (Carassius auratus L.) fingerlings in a fish farm near Budapest, Hungary, myxosporean plasmodia were observed on the fins. Plasmodia were most frequently found at the intersegmental joints of the finrays. Spores of Myxobolus diversus Nie et Li, 1973 known from China, were detectable in the mature plasmodia located within the lumen, and less often on the surface, of the cartilaginous finrays. The external wall of the plasmodia was constituted by a capsule formed from a collagenous material identical with the cartilaginous substance of the finrays. Matured plasmodia were filled by spores...

Fine structure of Henneguya pilosa sp. n. (Myxozoa: Myxosporea), parasite of Serrasalmus altuvei (Characidae), in Brazil

Carlos Azevedo, Edílson Matos

Folia Parasitologica 50[1] 37-42 (2003) | 10.14411/fp.2003.006

Henneguya pilosa sp. n., a new species of myxosporean from the gill filaments of the white piranha, Serrasalmus altuvei Ramirez, 1965 (Characidae), a freshwater teleost fish collected in the Zoological Garden of the city of Teresina (Piauí), Brazil, is described from light and transmission electron microscope observations. This myxosporean produced small plasmodia (up to 0.2 mm in diameter), each one containing all life-cycle stages of the parasite, including numerous spores. The spores, laterally compressed, averaged 54.2 (52.3-56.0) µm in total length and consisted of two unequal valves adhering together along the suture line...

Pseudoallencotyla gen. n., a new genus for Allencotyla pricei (Kritsky, Noble et Moser, 1978) (Monogenea: Heteraxinidae), with a key to genera of Heteraxininae

Francisco E. Montero, F. Javier Aznar, Mercedes Fernández, Juan A. Raga

Folia Parasitologica 50[1] 43-47 (2003) | 10.14411/fp.2003.007

In this study, we clarify the taxonomic status of Allencotyla pricei based on a re-examination of paratypes and voucher specimens. Four important characters are added to previous descriptions: the vagina is ventral; the cirrus is absent; the eggs are fusiform and have two polar filaments (one about 3.5 times longer than the other); and, there are two flat sclerites at each side of the dorsal trident-shaped sclerite in the clamps. A comparison of A. pricei with species from all the genera of the Heteraxininae, including Allencotyla mcintoshi, indicates that A. pricei has several exclusive characters, i.e., a ventral vagina,...

B.E. Olson, M.E. Olson, P.M. Wallis (Eds.): Giardia. The Cosmopolitan Parasite.

Oleg Ditrich

Folia Parasitologica 50[1] 48 (2003) | 10.14411/fp.2003.008

CABI Publishing, New York, NY, USA and Wallingford, UK, 2002. ISBN 0-85199-62-4, hardback, 352 pp. Price: £ 65.00 (US$ 120.00).

Mormyrogyrodactylus gemini gen. et sp. n. (Monogenea: Gyrodactylidae), a new gyrodactylid from Marcusenius macrolepidotus (Mormyridae) from South Africa

Wilmien J. Luus-Powell, Sevid N. Mashego, Lotfi F. Khalil

Folia Parasitologica 50[1] 49-55 (2003) | 10.14411/fp.2003.009

Mormyrogyrodactylus gemini gen. et sp. n. (Gyrodactylidea: Gyrodactylidae), a viviparous monogenean is described from the skin and fins of Marcusenius macrolepidotus (Peters) from South Africa. This new genus is unique in having a large cup-shaped cirrus armed with one large needle-like spine and numerous small hair-like spinelets. A peduncular bar is present. The haptor is clearly demarcated from the body and situated on a small pedicle. The haptor has one pair of large anchors, a ventral bar complex, a small dorsal bar and 16 evenly spaced marginal hooks. The ventral bar complex consists of three parts: an inverted U-shaped piece with...

D.I. Gibson, A. Jones, R.A. Bray (Eds.): Keys to the Trematoda. Volume I.

Tomáš Scholz, Petr Horák

Folia Parasitologica 50[1] 56 (2003) | 10.14411/fp.2003.010

CABI Publishing, Wallingford, UK & The Natural History Museum, London, UK, 2002. ISBN 0-85199-547-0, hardback, 521 pp. Price GBP 95.00, USD 175.00.

Toxicity of cadmium and zinc to the cercarial activity of Diplostomum spathaceum (Trematoda: Diplostomidae)

Neil J. Morley, Mark Crane, John W. Lewis

Folia Parasitologica 50[1] 57-60 (2003) | 10.14411/fp.2003.011

The toxicity of cadmium and zinc at concentrations ranging from 0.1 to 100 µg/l was investigated against the activity of Diplostomum spathaceum (Rudolphi, 1819) cercariae. Over a 24 h exposure period a significant reduction in cercarial activity occurred in solutions of cadmium, zinc, and a mixture of cadmium and zinc at all concentrations. Reduced cercarial activity also occurred in all toxicant solutions compared with controls after only 6 h exposure indicating that cercariae were vulnerable during the period of maximum cercarial infectivity (0-5 h). The mechanisms of metal toxicity and their importance to parasite transmission are discussed.

Review of the Rhopalothylacidae Guiart, 1935 (Cestoda: Trypanorhyncha), with a description of the adult of Pintneriella musculicola Yamaguti, 1934 and a redescription of P. gymnorhynchoides (Guiart, 1935) comb. n.

Ian Beveridge, Ronald A. Campbell

Folia Parasitologica 50[1] 61-71 (2003) | 10.14411/fp.2003.012

The family Rhopalothylacidae (Cestoda: Trypanorhyncha) is reviewed. The type species, Rhopalothylax gymnorhynchoides Guiart, 1935, is redescribed from the type specimens and belongs within the genus Pintneriella Yamaguti, 1934, previously described only from the plerocercus. Rhopalothylax therefore becomes a junior synonym of Pintneriella. The adult of Pintneriella musculicola Yamaguti, 1934 is described for the first time, from the shark Carcharias taurus Rafinesque from Australia. Pintneriella is characterised by two bothridia, a typical heteroacanthous armature, a unique, bipartite external seminal...

Component population study of Acanthocephalus tumescens (Acanthocephala) in fishes from Lake Moreno, Argentina

Carlos A. Rauque, Gustavo P. Viozzi, Liliana G. Semenas

Folia Parasitologica 50[1] 72-78 (2003) | 10.14411/fp.2003.013

Seasonal samples of all fish species from Lake Moreno were taken in order to determine the presence of paratenia, to evaluate the status of the hosts and to characterise the transmission of Acanthocephalus tumescens (von Linstow, 1896) at the component population level. Prevalence, mean abundance, mean intensity, numbers of gravid females, relative abundance of the different fish species, relative output of eggs and relative flow rates for each host species were computed. Acanthocephalus tumescens showed low host specificity, successfully parasitizing six out of eight fish species present in the lake. No paratenic infection was registered....

Effect of fast protein liquid chromatography fractionated salivary gland extracts from different ixodid tick species on interleukin-8 binding to its cell receptors

Paulína Kocáková, Monika Sláviková, Valéria Hajnická, Mirko Slovák, Juraj Gašperík, Iveta Vančová, Norbert Fuchsberger, Patricia A. Nuttall

Folia Parasitologica 50[1] 79-84 (2003) | 10.14411/fp.2003.014

Interleukin-8 plays a critical role in inflammatory processes. Hence generation of molecules with anti-IL-8 activity is likely to be important for successful feeding and for survival of the ticks. Anti-IL-8 activity was studied in saliva of three ixodid tick species - Dermacentor reticulatus (Fabricius, 1794), Rhipicephalus appendiculatus Neumann, 1901, and Amblyomma variegatum (Fabricius, 1794). The greatest activity was shown in saliva prepared from D. reticulatus. The activity was attributed to tick salivary gland molecules that bind to IL-8, preventing binding of the chemokine to its specific receptor, rather than to...

Observations on Babesiosoma mariae (Apicomplexa: Dactylosomatidae) from the Okavango Delta, Botswana

Nico J. Smit, Jo G. Van As, Angela J. Davies

Folia Parasitologica 50[1] 85-86 (2003) | 10.14411/fp.2003.015