Folia Parasitologica, vol. 44 (1997), issue 4

Margolisiella kabatai gen et sp n (Apicomplexa: Eimeriidae), a parasite of native littleneck clams, Protothaca staminea, from British Columbia, Canada, with a taxonomic revision of the coccidian parasites of bivalves (Mollusca: Bivalvia)

Desser SS, Bower SM

Folia Parasitologica 44[4] 241-247 (1997)

Two of 98 native littleneck clams, Protothaca staminea Conrad, from Cooper's Cove, Sooke Basin were infected with an eimeriorin coccidian parasite. Merogonic, gamontogonic and sporogonic development were observed in renal tubular epithelial cells. Sporulation of the oocysts occurred within the host. Mature oocysts were spherical mean 41 mu m (range 30-44), and contained about 32 subspherical sporocysts (9 x 10 mu m), each of which contained 4 sporozoites. Spherical 19 mu m (18-20), cyst-like structures and smaller multinucleate bodies, some of which resembled sporocysts, were also seen.A review of the coccidian parasites of bivalves led to the erection...

Bovine leukemia virus-induced clinical signs and morphological changes of encephalitozoonosis in rabbits

Levkut M, Lesnik F, Balent P, Zajac V, Korim P, Slavikova K

Folia Parasitologica 44[4] 249-254 (1997)

Fourteen three-month-old rabbits spontaneously-infected with the microsporidium Encephalitozoon cuniculi Levaditi, Nicolau et Schoen, 1923 were inoculated intravenously with lymphocytes (Ly) from seropositive bovine leukemia virus infected cattle (Ly/BLV) or with fetal lamb kidney cells infected with bovine fetal leukemia (FLK/BLV). Thirteen rabbits were seropositive to BLV at least for a period of three months. Six rabbits died of pulmonary lesions. Chronic inflammatory lesions of encephalitozoonosis were found in six rabbits killed between 454 and 548 days of the observation period. Five animals bore subcutaneous granulomas. Immunohistochemically,...

Helminth parasites of Epinephelus morio (Pisces: Serranidae) of the Yucatan Peninsula, southeastern Mexico

Moravec F, VidalMartinez VM, VargasVazquez J, VivasRodriguez C, GonzalezSolis D, MendozaFranco E, SimaAlvarez R, GuemezRicalde J

Folia Parasitologica 44[4] 255-266 (1997)

The present paper comprises a systematic survey of helminths from 202 red groupers, Epinephelus morio (Valenciennes) (Pisces: Serranidae), the most important commercial marine fish in the region, collected from ten localities off the Yucatan Peninsula in the Gulf of Mexico during 1994-1996; two more helminth species were recorded from E. morio earlier. Thirty species of helminths were found: Monogenea 1, Cestoda 3, Trematoda 17, Nematoda 8, Acanthocephala 1. Of them, 15 species were adults, whereas 15 species were larval stages parasitizing piscivorous elasmobranch and teleostean fishes, birds and marine mammals as adults. A new didymozoid trematode,...

Long-term and seasonal changes in composition and richness of intestinal helminth communities in eels Anguilla anguilla of an isolated English river

Kennedy CR

Folia Parasitologica 44[4] 267-273 (1997)

The need for more long-term studies on helminth communities was addressed by examining changes in composition and diversity of the intestinal helminth component and infracommunities in eels of a small isolated river over 12 years. Examination of samples over one summer season indicated that single samples were representative of community richness in that year. In 1985 the community was species poor(1 species only) and with zero diversity, but by 1996 it comprised six species and all parameters at both levels indicated that it was the richest community yet reported from eels. This overall increase in diversity was not regular or uniform from year to...

Pseudorhabdosynochus yucatanensis sp. n. (Monogenea: Diplectanidae) from the gills of the red grouper Epinephelus morio (Pisces: Serranidae) of the Yucatan Peninsula, Mexico

VidalMartinez VM, AguirreMacedo L, MendozaFranco EF

Folia Parasitologica 44[4] 274-278 (1997)

Pseudorhabdosynochus yucatanensis sp. n. (Diplectanidae) is described from the gills of the red grouper, Epinephelus morio (Valenciennes, 1824) (Serranidae), from the coast of the Yucatan Peninsula, Mexico. This new species is characterized by having both the ventral and the dorsal squamodiscs composed of 10-12 rows of rods, with 0-1 innermost tow forming a closed circle, Furthermore, the vagina of P. yucatanensis has a non-sclerotized ampulla with a fine, sclerotized duct leading to a sclerotized seminal receptacle. Prevalence (percentage of infected fish) and abundance (mean number of worms per examined fish) were estimated for P. yucatanensis from...

Notopronocephalus peekayi gen. et sp. n. (Digenea: Pronocephalidae) from Australian freshwater turtles

Cribb TH, Pichelin SP

Folia Parasitologica 44[4] 279-282 (1997)

Notopronocephalus peekayi gen, et sp, n. is described from the intestine of Elseya latisternum Gray, 1867, E. dentata (Gray, 1863) and Emydura signata Ahl, 1932 from rivers in Queensland. The new genus is distinguished by the absence of ventral glands, simple (neither diverticulate nor sinuous) caeca terminating at the anterior margin of the testes, excretory arms not uniting in forebody, single ovary, two opposite testes close to the posterior end of the body, intracaecal genital pore, vitelline follicles anterior to the testes, cirrus-sac orientated obliquely and not divided into two portions, and the uterus intracaecal. This is the first pronocephalid...

Effects of colchicine on the number of T2 vesicles in the tegument of Fasciola hepatica

Stoitsova S, Gorchilova L

Folia Parasitologica 44[4] 283-288 (1997)

The role of microtubules in the secretory processes in the tegument of adult trematode Fasciola hepatica L. is studied by estimating the effects of colchicine, a substance known to disrupt microtubules, on the number of T2 vesicles. Tissue slices of the worm are incubated in Hedon-Fleig medium with or without 5 x 10(-4)M colchicine. The dynamics of the colchicine-provoked secretory block is examined by morphometry on samples processed for electron microscopy. T2 vesicles are estimated as a total number or separately within three levels (apical, sub-apical and central) of the distal tegument. The secretory block is demonstrated as reduction in the total...

Proteocephalus joanae sp n (Eucestoda: Proteocephalidea), a parasite of Xenodon neuwiedi (Serpentes: Colubridae) from South America

deChambrier A, Paulino RC

Folia Parasitologica 44[4] 289-296 (1997)

A new species of Proteocephalus, P. joanae sp. n., is described from the intestine of the colubrid snake, Xenodon neuwiedi (Gunther, 1863) (Serpentes: Xenodontinae), from Brazil. The new species differs from all other members of Proteocephalus by possessing a swollen elongated posterior part of the scolex herein considered as a metascolex. Furthermore, it is the only member of New World Proteocephalus possessing a voluminous glandular apical organ larger than suckers. P. joanae is also characterized by very elongated gravid proglottides. This is the first member of the Proteocephalidea occurring in Xenodon. Even though the species differs significantly...

Some factors which influence the in vitro maintenance of Anisakis simplex (Nematoda)

Iglesias L, Valero A, Adroher FJ

Folia Parasitologica 44[4] 297-301 (1997)

Several culture media as well as some factors that may affect the in vitro development of the nematode Anisakis simplex Rudolphi, 1809 have been studied. After testing six media and four temperatures, the conditions for the in vitro culture selected were as follows: RPMI-1640 + 20% (v/v) heat-inactived fetal bovine serum or Meyer's M3 (without agar) media, at 37 degrees C, under 5% CO2 in air atmosphere, and renewal of the medium twice a week. The average survival rates of the larvae were significantly increased when the pH of the culture medium was increased (from 4.0 to 7.2) or decreased (from 7.2 to 4.0) after L-3 to L-4 moulting. The length of...

Fate of infective larvae of Brugia malayi in the peritoneal cavity of Mastomys natalensis and Meriones unguiculatus

Murthy PK, Murthy PR, Tyagi K, Chatterjee RK

Folia Parasitologica 44[4] 302-304 (1997)

The fate of intraperitoneally inoculated infective third-stage larvae (L-3) of the nematode Brugia malayi Lichtenstein and the status of the peritoneal macrophage function were investigated in the susceptible rodent hosts Mastomys natalensis Roberts and Meriones unguiculatus Milne-Edwards (jird). Jirds and M, natalensis were inoculated intraperitoneally with 125 and 250 L-3 and the worm burden and peritoneal macrophage function in the two species were compared at different days post-inoculation (DPI), None of the infected M, natalensis had adult worms in the peritoneal cavity; very few degenerating L-3 surrounded by peritoneal cells were recovered...

A new species of Nothobomolochus (Copepoda: Bomolochidae) parasitic on Engraulis anchoita (Pisces: Engraulidae) from Argentina

Timi JT, Sardella NH

Folia Parasitologica 44[4] 305-308 (1997)

Nothobomolochus cresseyi sp, n. (Copepoda: Bomolochidae), a parasite from gills of the engraulid fish Engraulis anchoita Hubbs et Marini (Pisces: Engraulidae) from the coast of Argentina, is described and illustrated. The new species can be distinguished from other species of Nothobomolochus Vervoort, 1962 by the following combination of characters: three modified setae on the base of the antennule similar in length to the plumose setae, the nature of the armature of the third segment of the fourth endopod and the length and width of the thoracic somites 2 to 4 decreasing gradually. The new species represents the First record of this genus for Argentina.

Transmission cycles of Borrelia burgdorferi sensu lato involving Ixodes ricinus and/or I-hexagonus ticks and the European hedgehog, Erinaceus europaeus, in suburban and urban areas in Switzerland

Gern L, Rouvinez E, Toutoungi LN, Godfroid E

Folia Parasitologica 44[4] 309-314 (1997)

European hedgehog, Erinaceus europaeus Linnaeus, 1758, is a common host of Ixodes ricinus L, and I. hexagonus Leach, vectors of the Lyme disease spirochaete, Borrelia burgdorferi sensu lato. TO investigate whether hedgehogs are reservoirs for B. burgdorferi, hedgehogs were captured in a suburban area suitable for both tick species and in an urban area where I, ricinus is absent. The infection status of the hedgehogs was determined by xenodiagnosis using I. ricinus and I. hexagonus larvae. I. hexagonus and/or I. ricinus were found on;ll hedgehogs (n = 8) from the suburban area. In contrast, only I. hexagonus was infesting animals (n = 5) from the urban...

Observations on the early development of Truttaedacnitis clitellarius (Nematoda: Cucullanidae)

Choudhury A, Dick TA

Folia Parasitologica 44[4] 315-316 (1997)