Folia Parasitologica, vol. 49 (2002), issue 2

Myxobolus species (Myxozoa), parasites of fishes in the Okavango River and Delta, Botswana, including descriptions of two new species

Cecilé C. Reed, Linda Basson, Liesl L. Van As

Folia Parasitologica 49[2] 81-88 (2002) | DOI: 10.14411/fp.2002.016

Fieldwork was conducted in 1998 and 1999 in the Okavango River and Delta and a total of 275 fishes representing 31 species were examined for the presence of myxosporean parasites. A total of seven myxosporeans of the genus Myxobolus Bütschli, 1882 were found infecting the fishes. Two new species namely Myxobolus etsatsaensis sp. n. from Barbus thamalakanensis Fowler, 1935 and M. paludinosus sp. n. from Barbus paludinosus Peters, 1852 are described. Myxobolus africanus Fomena, Bouix et Birgi, 1985, M. camerounensis Fomena, Marqués et Bouix, 1993, M. hydrocyni Kostoïngue et Toguebaye, 1994,...

A new form of raabeia-type actinosporean (Myxozoa) from the oligochaete Uncinais uncinata

Janet Koprivnikar, Sherwin S. Desser

Folia Parasitologica 49[2] 89-92 (2002) | DOI: 10.14411/fp.2002.017

In a study of the oligochaete fauna and their actinosporean parasites in three lakes in Algonquin Park, Canada, a novel form of raabeia-type actinosporean was observed in a single specimen of Uncinais uncinata (∅ersted) (Naididae). This form differs from those previously described in its small size, and by having caudal processes that gradually widen and terminate with a single prominent branch.

Haploporus mugilis sp. n. (Digenea: Haploporidae) from Valamugil engeli (Pisces: Mugilidae) in the Taiwan Straits, China

Liu Sheng-fa, Yang Ting-bao

Folia Parasitologica 49[2] 93-95 (2002) | DOI: 10.14411/fp.2002.018

Haploporus mugilis sp. n. (Digenea: Haploporidae) was obtained from the intestine of kandas, Valamugil engeli (Bleeker) (Mugilidae, Perciformes) in the Taiwan Straits, China. It most closely resembles Haploporus spinosus Machida, 1996 from the intestine of Crenimugil crenilabis in Japanese and adjacent waters in the intestinal bifurcation posterior to the acetabulum, in egg-size (0.039-0.044 × 0.019-0.022 in H. mugilis and 0.034-0.042 × 0.018-0.023 in H. spinosus) and in the hermaphroditic sac armed with spines. However, it differs from the latter in its hermaphroditic sac with two long and numerous small spines...

Morphological features of Prosorhynchus crucibulum and P. aculeatus (Digenea: Bucephalidae), intestinal parasites of Conger conger (Pisces: Congridae), elucidated by scanning electron microscopy

Maria João Santos, David I. Gibson

Folia Parasitologica 49[2] 96-102 (2002) | DOI: 10.14411/fp.2002.019

The external morphology of two bucephalid digenean parasites of Conger conger (Linnaeus) (Congridae, Anguilliformes) caught northwest of the Iberian Peninsula, Prosorhynchus crucibulum (Rudolphi, 1819) Odhner, 1905 and P. aculeatus Odhner, 1905, were studied using scanning electron microscopy (SEM). SEM techniques elucidated new external morphological details, mainly relating to the tegument and protruding organs, such as, in P. crucibulum, a papilla-like structure associated with the pharynx and, in P. aculeatus, the cirrus. The tegument bears scale-like spines, which in both species are arranged quincuncially. The...

Effect of pulp and paper mill effluent (BKME) on physiological parameters of roach (Rutilus rutilus) infected by the digenean Rhipidocotyle fennica

Zsigmond Jeney, E. Tellervo Valtonen, Galina Jeney, E. Ilmari Jokinen

Folia Parasitologica 49[2] 103-108 (2002) | DOI: 10.14411/fp.2002.020

Physiological parameters were measured after experimental infection of roach (Rutilus rutilus L.) with Rhipidocotyle fennica Gibson, Valtonen et Taskinen, 1992 (Digenea) cercariae. The fish were caught from two lakes: a eutrophic bleached kraft mill effluent (BKME)-contaminated lake and an oligotrophic unpolluted lake. The intensity of infection was followed up to 10 days post infection (p.i.) and physiological parameters indicating non-specific stress responses and the condition of fish were examined simultaneously. The mean abundance, the number of parasites per fish, of R. fennica was significantly higher in the fish from the...

Two new nematodes, Paraseuratoides ophisterni gen. et sp. n. (Quimperiidae) and Philometra ophisterni sp. n. (Philometridae), from the swamp-eel Ophisternon aenigmaticum in Mexico

František Moravec, Guillermo Salgado-Maldonado, Rogelio Aguilar-Aguilar

Folia Parasitologica 49[2] 109-117 (2002) | DOI: 10.14411/fp.2002.021

Two new nematodes, Paraseuratoides ophisterni gen. et sp. n. (Seuratoidea: Quimperiidae) and Philometra ophisterni sp. n. (Dracunculoidea: Philometridae) are described based on specimens recovered from the intestine and mesentery, respectively, of the swamp-eel Ophisternon aenigmaticum Rosen et Greenwood (Synbranchiformes: Synbranchidae) from a canal of the Papaloapan River in Tlacotalpan, State of Veracruz, Mexico. The genus Paraseuratoides is most similar to Paraseuratum Johnston et Mawson, 1940, differing from it mainly in the absence of a bulbous inflation on the anterior end of the oesophagus and in the structure...

Development of Spinitectus inermis (Nematoda: Cystidicolidae), a parasite of eel, Anguilla anguilla, in Europe

Aurélia Saraiva, František Moravec, Anabela Pereira, Cristina Cruz

Folia Parasitologica 49[2] 118-126 (2002) | DOI: 10.14411/fp.2002.022

The development of the nematode Spinitectus inermis (Zeder, 1800), a parasite of the stomach of eels, Anguilla anguilla (L.) in Europe, was experimentally studied. Mayfly nymphs Caenis macrura, Ecdyonurus dispar, Heptagenia sulphurea, Potamanthus luteus and Seratella ignita from Portugal and the Czech Republic were found to serve as experimental intermediate hosts. After ingestion of the nematode eggs by the mayfly nymphs, the toothed first-stage larvae were released and penetrated into the body cavity of the intermediate host. There they moulted twice (on day 4 and 6 post infection [p.i.] at water temperatures...

Post-cyclic transmission in Acanthocephalus tumescens (Acanthocephala: Echinorhynchidae)

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

Folia Parasitologica 49[2] 127-130 (2002) | DOI: 10.14411/fp.2002.023

The aim of this study was to investigate the post-cyclic transmission of Acanthocephalus tumescens (von Linstow, 1896) from Galaxias maculatus Jenyns to Oncorhynchus mykiss (Walbaum). Wild G. maculatus naturally infected with A. tumescens were fed to cultured rainbow trout, which were sacrificed at the second, third and fourth weeks post infection. Normally attached male and female acanthocephalans were recovered alive from the intestine of rainbow trout. Parasites survive at least four weeks post infection, growing and attaining full sexual maturity. Prevalence and mean intensity generally decreased after infection....

Description of the previously unknown male of Caligus mortis Kensley, 1970 (Copepoda: Caligidae), parasite of intertidal fish from South Africa

Nico J. Grobler, Jo G. Van As, Piet A.S. Olivier

Folia Parasitologica 49[2] 131-136 (2002) | DOI: 10.14411/fp.2002.024

Caligus mortis Kensley, 1970 was originally described from females collected from intertidal pools along the coast of Namibia. During surveys at Jeffreys Bay and De Hoop Nature Reserve in South Africa, both females and males of C. mortis were collected from intertidal pool fish hosts. Based on this material a full description of the male is given, and a comparison with the female reveals the sexual dimorphic characteristics.

Gnathia pantherina sp. n. (Crustacea: Isopoda: Gnathiidae), a temporary ectoparasite of some elasmobranch species from southern Africa

Nico J. Smit, Linda Basson

Folia Parasitologica 49[2] 137-151 (2002) | DOI: 10.14411/fp.2002.025

Haematophagous larvae of a gnathiid isopod were collected from the gills, nares and buccal cavity of a single leopard catshark Poroderma pantherinum (Smith, 1838) at Jeffreys Bay and five puffadder shysharks Haploblepharus edwardsii (Voight, 1832) and one blackspotted electric ray Torpedo fuscomaculata Peters, 1855, at the De Hoop Nature Reserve on the South African south coast. Larvae were kept in fresh seawater until their moult into adult stages. The morphology of the adult males did not conform to that of any known species and they are therefore described as Gnathia pantherina sp. n. The descriptions of the adult male,...

R. Muller: Worms and Human Disease.

Tomáš Scholz, Oleg Ditrich

Folia Parasitologica 49[2] 152 (2002) | DOI: 10.14411/fp.2002.026

Second Edition. CABI Publishing, Wallingford, Oxon, UK, 2002. ISBN 0 85199 516-0, paperback, 300 pp. Price £35.00 (US$60.00).

Tick salivary gland extract-activated transmission of Borrelia afzelii spirochaetes

Jitka Pechová, Gabriela Štěpánová, Lubomír Kovář, Jan Kopecký

Folia Parasitologica 49[2] 153-159 (2002) | DOI: 10.14411/fp.2002.027

Saliva-activated transmission of Borrelia afzelii Canica, Nato, du Merle, Mazie, Baranton et Postic, 1993 was demonstrated using salivary gland extract (SGE) from Ixodes ricinus (L., 1758) ticks and C3H mice. Injection of Borrelia spirochaetes together with SGE increased the level of bacteraemia and accelerated the appearance of bacteria in the urinary bladder, compared with the injection of spirochaetes alone. More I. ricinus nymphs became infected when feeding on mice inoculated with B. afzelii plus SGE. Analysis of cytokines produced by cells of draining lymph nodes from SGE-treated mice showed a suppression of...

Spirorchid and serpulid polychaetes are candidates as invertebrate hosts for Myxozoa

Marianne Køie

Folia Parasitologica 49[2] 160-162 (2002) | DOI: 10.14411/fp.2002.028

House fly (Musca domestica) as a transport vector of Cryptosporidium parvum

Antonio Clavel, Olga Doiz, Santiago Morales, Marzo Varea, Cristina Seral, F. Javier Castillo, Jesús Fleta, Carmen Rubio, Rafael Gómez-Lus

Folia Parasitologica 49[2] 163-164 (2002) | DOI: 10.14411/fp.2002.029

Ultrastructure of pigmented photoreceptor of adult Crepidostomum metoecus (Trematoda: Digenea: Bunoderidae)

Zdeňka Žďárská, Jana Nebesářová

Folia Parasitologica 49[2] 165-166 (2002) | DOI: 10.14411/fp.2002.030

Obseravtions on the occurrence and maturation of Spinitectus inermis (Nematoda: Cystidicolidae) in the Sousa River, Portugal

Aurélia Saraiva, Anabela Pereira, Cristina Cruz

Folia Parasitologica 49[2] 167-168 (2002) | DOI: 10.14411/fp.2002.031