Folia Parasitologica, vol. 45 (1998), issue 3

Ectoparasitic species of the genus Trichodina (Ciliophora: Peritrichida) parasitising British freshwater fish

William Hugo Gaze, Rodney Wootten

Folia Parasitologica 45[3] 177-190 (1998)

Seven species of the genus Trichodina Ehrenberg, 1838 were identified during a sampling programme of twenty freshwater fish species from approximately sixty sites in Scotland, England and Wales. Species found include: Trichodina acuta Lom, 1961 from Cyprinus carpio L., Carassius auratus L., Oncorhynchus mykiss (Walbaum), Salmo trutta L. and Phoxinus phoxinus L.; Trichodina domerguei Wallengren, 1897 from Gasterosteus aculeatus L.; Trichodina tenuidens Faure-Fremiet, 1944 from Gasterosteus aculeatus; Trichodina pediculus Ehrenberg, 1838 from Gasterosteus aculeatus; Trichodina modesta Lom, 1970 from Abramis brama L.; Trichodina nigra Lom, 1960 from Cyprinus...

Unikaryon montanum sp. n. (Protista: Microspora), a new pathogen of the spruce bark beetle, Ips typographus (Coleoptera: Scolytidae)

Jaroslav Weiser, Rudolf Wegensteiner, Zdeněk Žižka

Folia Parasitologica 45[3] 191-195 (1998)

Unikaryon montanum sp. n. infects the fat body, muscle, Malpighian tubules and ovaries of adult Ips typographus L. The development is haplokaryotic, with separate nuclei during the schizogony and sporogony. Sporonts have the cellular envelope with added layer of electron dense material. Two types of spores are formed: small broad-oval primary spores, 1.5 × 1.0 µm, with warty surface of spore wall, uninucleate, with isofilar polar filament in 5/6 coils and elongated-oval environmental spores, 0.8-1 × 2 µm, with warty spore wall attenuated at the anterior end, uninucleate, with spore polar filament in 8 coils. Both types have a dual polaroplast...

In vitro susceptibility studies of Malaysian Plasmodium falciparum isolates and clones against schizontocidal drugs

Hooi Hoon Ang, Kit Lam Chan, Joon Wah Mak

Folia Parasitologica 45[3] 196-198 (1998)

Five Malaysian isolates of the protozoan Plasmodium falciparum Welch were cultured in vitro following the method of Trager and Jensen (1976, 1977) and subsequently cloned using the limiting dilution method of Rosario (1981). Thirty clones were obtained and were later characterized against schizontocidal drugs, chloroquine, mefloquine and quinine, using the modified in vitro microtechnique. Results showed that these local isolates were heterogenous and most of the clones exhibited similar pattern of susceptibility as their parent isolate except for ST 168 clone and two ST 195 clones that were sensitive but two ST 165 clones, two ST 168 clones and five...

Life cycle of Ascocotyle (Phagicola) angeloi (Digenea: Heterophyidae) in the Neotropical Region

Margarita Ostrowski de Núñez

Folia Parasitologica 45[3] 199-204 (1998)

Stages of the life cycle of Ascocotyle (Phagicola) angeloi Travassos, 1928 were experimentally obtained, from cercariae from naturally infected Littoridina castellanosae (Gaillard) collected in artificial ponds in the Zoological Garden of Buenos Aires. Metacercariae were found encysted mainly in muscles and ovary, but also in other parts of the body of naturally and experimentally infected fish Jenynsia lineata (Jenyns) (Atheriniformes: Jenynsidae). Adults were obtained experimentally from chicks and mice. Ascocotyle (Phagicola) angeloi, redescribed in the present paper, is distinguished from other species of the subgenus by the two rows of oral spines,...

Observations on the seasonal occurrence of two species of transversotrematid Digenea parasitising the sparid fish Acanthopagrus australis in Moreton Bay, eastern Australia

Frank R. Roubal

Folia Parasitologica 45[3] 205-210 (1998)

Ectoparasitic Prototransversotrema steeri Angel infected Acanthopagrus australis (Günther) in western (W. Bay) and southern (S. Bay) Moreton Bay with greatest abundance in winter (June - August), and none in summer (December - February). This confirms previous observations on seasonality of P. steeri from a small estuary in New South Wales. Transversotrema licinum Manter, which is a new host and geographical record, infects A. australis in W. Bay but not S. Bay, with large abundances in summer and winter, lowest abundance in spring. Increased size of P. steeri in winter in S. Bay could be explained by increased size of fish sampled since fish length...

Spermatozoa and spermiogenesis in the monocotylid Heterocotyle capricornensis (Platyhelminthes, Monogenea, Monopisthocotylea), including observations of aberrant folding and fusing of spermatozoa in one individual

Nikki A. Watson, Leslie A. Chisholm

Folia Parasitologica 45[3] 211-220 (1998)

Spermatozoa of the monogenean Heterocotyle capricornensis Chisholm et Whittington, 1996 are long and filiform, comprising an elongate nucelus, probably a single elongate mitochondrion and two incorporated axonemes, one of which is shifted with respect to the other. The shift results in a region at each end of the sperm where only one axoneme is present, accompanied by the nucleus and mitochondrion at one end and the nucleus and/or mitochondrion at the other. By taking note of the direction of dynein arms on the axonemal doublet microtubules, each axoneme is identified and followed from beginning to end. No basal bodies remain in mature sperm but the...

Pseudorhabdosynochus capurroi sp. n. (Monogenea: Diplectanidae) from the gills of Mycteroperca bonaci (Pisces: Serranidae) of the Yucatan Peninsula, Mexico

Victor M. Vidal-Martínez, Edgar F. Mendoza-Franco

Folia Parasitologica 45[3] 221-224 (1998)

A new monogenean species, Pseudorhabdosynochus capurroi sp. n., is described from the gills of the black grouper, Mycteroperca bonaci (Poey) (Serranidae), from the Yucatan Peninsula, Mexico. The new species can be differentiated from all other known species of Pseudorhabdosynochus Yamaguti, 1958 by being the largest one recorded until now (1162-1535 µm body length). Moreover, the vagina of P. capurroi has a small funnel-shaped opening with a non sclerotized vesicle from which a fine sclerotized duct leads proximally to a sclerotized seminal receptacle, and the testis is bilobate. The squamodiscs have 14 to 16 rows of rods, of which 3 to 5 rows...

Echinobothrium megacanthum sp. n. (Cestoda: Diphyllidea) from the eagle ray Myliobatis goodei (Chondrichthyes: Rajoidei) from the Patagonian shelf of Argentina

Verónica A. Ivanov, Ronald A. Campbell

Folia Parasitologica 45[3] 225-229 (1998)

A new species of Echinobothrium is described from the spiral intestine of the eagle ray Myliobatis goodei Garman, 1885 from the San Matías Gulf, Argentina. Echinobothrium megacanthum sp. n. is distinguished from all others by the following combination of characters: 27 large hooks per apical group, a continuous row of 12 hooklets on each lateral surface of the rostellum, 38-43 spines per row on the cephalic peduncle and 13-15 testes per segment. The new species is most similar to E. euzeti Campbell et Carvajal, 1980, E. mathiasi Euzet, 1951 and E. raschii Campbell et Andrade, 1997. Echinobothrium megacanthum can be differentiated from E. euzeti by...

Description of a new species of Maritrema (Digenea: Microphallidae) from Larus dominicanus (Aves: Laridae) in Buenos Aires coast, Argentina

Florencia Cremonte, Sergio Roberto Martorelli

Folia Parasitologica 45[3] 230-232 (1998)

Maritrema orensensis sp. n. (Digenea: Microphallidae) from Balneario Orense, Buenos Aires province, Argentina, is described. Adults of M. orensensis were collected from the intestine of the kelp gull Larus dominicanus Lichtenstein, 1823 (Aves: Laridae) and differ from adults of other related species, principally, in the shorter intestinal caeca and the incomplete ring of vitelline follicles.

Redescription of Rhabdochona anguillae (Nematoda: Rhabdochonidae), a parasite of eel, Anguilla anguilla, in Europe

Aurélia M. Saraiva, František Moravec

Folia Parasitologica 45[3] 233-238 (1998)

The nematode Rhabdochona anguillae Spaul, 1927, a specific intestinal parasite of the European eel, Anguilla anguilla (L.), is redescribed and illustrated from specimens collected from eels of the Sousa River, northern Portugal (prevalence 20%, intensity 2-13). The species is characterized by the presence of 14 anterior teeth in the prostom, small non-bifurcate deirids, absence of lateral preanal papillae, by the length (0.460-0.660 and 0.130-0.150 mm) and the shape of spicules, fairly large (0.041-0.054 × 0.025-0.030 mm) mature eggs without filaments, and by the bluntly pointed to rounded tip of the tail. Its morphological features are discussed in...

Antigens of the sheep scab mite Psoroptes ovis

Kamburapola Gamarallage Indrananda Jayawardena, Agi Heller-Haupt, Ralpha Martin Woodland, Mavelikara Godavarma Raja Varma

Folia Parasitologica 45[3] 239-244 (1998)

Sheep scab caused by the mite Psoroptes ovis (Hering) is a highly contagious disease of sheep. As a first step in developing a mite-derived vaccine for controlling the disease, the soluble antigens in mite extracts which induce an immune response in sheep were identified by electrophoretic and immunoblotting techniques. At least 22 proteins were present in P. ovis extracts as revealed by Coomassie Blue staining. Mite-infested sheep serum recognised six antigenic bands in the extracts with approximate relative molecular weights ranging from 12 to 183 kDa. A deeply staining band at 31.2 kDa and another at 41.8 kDa are of particular diagnostic value....

Interaction of virulent and attenuated tick-borne encephalitis virus strains in ticks and a tick cell line

Jan Kopecký, Ilona Staňková

Folia Parasitologica 45[3] 245-250 (1998)

An interference between a thermosensitive (ts) mutant and the wild-type (wt) of tick-borne encephalitis (TBE) virus in Ixodes ricinus L. and Rhipicephalus appendiculatus (Neumann) ticks is reported. I. ricinus females were dually infected by a parenteral inoculation of ts and wt strains at 10-day interval. Interference was demonstrated by the lowered ability of wt virus to replicate in ticks previously infected by ts virus. The wt virus was demonstrated in only 30% of the ticks; the average virus titre was lowered by 2.1 log10 compared with the control group, which was infected with the wt virus only. The oral infection of R. appendiculatus...

First record of Maritrema pyrenaica (Digenea: Microphallidae) in Spain (Western Pyrenees) in its intermediate hosts

Juan C. Casanova, Mercedes Villa, Isabel Montoliu

Folia Parasitologica 45[3] 251-252 (1998)

Seasonal dynamics of Plehniella coelomica (Trematoda: Sanguinicolidae) in two catfish, Pimelodus albicans and P-maculatus (Pisces : Siluriformes), from La Plata River, Argentina

M.F. Avendaño de Mac Intosh, Margarita Ostrowski de Núñez

Folia Parasitologica 45[3] 253-255 (1998)