Folia Parasitologica, vol. 44 (1997), issue 3

Lectins in snail-trematode immune interactions: a review

Horak P, vanderKnaap WPW

Folia Parasitologica 44[3] 161-172 (1997)

Lectins as carbohydrate recognition proteins other than enzymes or immunoglobulins play important roles in living systems, e.g., in cell-cell recognition. They are considered to be involved in snail trematode immune interactions, i.e., in a system where antibodies are lacking and lectins might at least partially substitute immunoglobulin functions. From the snail side, lectins can be located on haemocyte surfaces as receptors for foreignness and they can be found freely in plasma. The latter can function as agglutinins/opsonins helping in the recognition of parasites by haemocytes. They may also link immune cells and pathogens by recognition of surface...

Helminth ectoparasites of sillaginid fishes (Perciformes: Percoidei) have low species richness

Hayward CJ

Folia Parasitologica 44[3] 173-187 (1997)

Just nineteen species of ectoparasitic helminths were found in a survey of over 1,500 individuals of 26 species of sillaginid fishes in the Indo-west Pacific. A twentieth worm is known only from the literature; a twenty-first, also known only from the literature, is considered a doubtful record. Fifteen of the twenty worms are branchial monogeneans, one is a monogenean of the pharyngeal plates, one is an ectoparasitic digenean living under the scales, and three are leeches of the mouth cavity and fins. The most common monogeneans were diplectanids (Diplectanum spp. and Monoplectanum spp.) and microcotylids (Polylabris spp.), each with five recently...

Complement fixing antibody production in thymectomized Oncorhynchus mykiss, vaccinated against or infected with the pathogenic haemoflagellate Cryptobia salmositica

Feng SJ, Woo PTK

Folia Parasitologica 44[3] 188-194 (1997)

Short-term thymectomized (two months after thymectomy) adult rainbow trout, Oncorhynchus mykiss (Walbaum) infected with the flagellate Cryptobia salmositica Katz, 1951 responded well during primary infection with C. salmositica and recovered fish also showed secondary response (rapid production of complement fixing antibody after homologous challenge) five months after recovery. Complement fixing antibody was detected during primary and secondary responses and the titres of complement fixing antibody in thymectomized fish were significantly lower than those in infected intact fish. The parasitaemia in thymectomized infected fish was significantly lower...

Caryospora kalimantanensis sp n (Apicomplexa: Eimeriidae) from the mangrove snake Boiga dendrophila (Serpentes: Boiginae) from Kalimantan

Modry D, Koudela B

Folia Parasitologica 44[3] 195-198 (1997)

A new coccidian parasite of the genus Caryospora Leger is described from the colubrid snake Boiga dendrophila Boie, 1827 imported from Kalimantan. Oocysts of Caryospora kalimantanensis sp. n. are spherical, 18.7 (17.0-20.0) mu m in diameter, with a bilayered slightly pitted and brownish oocyst wall. A micropyle and oocyst residuum are absent. One globular polar granule is present in 45% of sporulated oocysts. Sporocysts are ovoidal to ellipsoidal, 14.5 (13.0-15.5) x 10.5 (10.0-11.0) mu m, with prominent Stieda and substieda bodies. Sporocyst residuum is present as small granules scattered among sporozoites. Sporozoites are elongate, lying lengthwise...

Host-finding behaviour of Cotylurus flabelliformis (Trematoda: Strigeidae) cercariae for snail hosts

Campbell RA

Folia Parasitologica 44[3] 199-204 (1997)

Cercariae of Cotylurus flabelliformis (Faust, 1917) were individually tested in 6 experiments for evidence of chemoattraction to snail hosts, host-specificity, and rate of dispersal. Five species of snails were tested: Lymnaea stagnalis appressa Say, 1821, Stagnicola elodes (Say, 1821), Physelia gyrina (Say, 1821), Planorbella trivolvis (Say, 1817), and Oxyloma retusum (Lea, 1834). The data substantiate that cercariae of C. flabelliformis have a chemo-positive attraction to undetermined diffusable substances from snails, show host-specificity, and do not attack the snail that produced them. Cercarial response time was significantly influenced by cercarial...

Sciadicleithrum meekii sp. n. (Monogenea: Ancyrocephalinae) from the gills of Cichlasoma meeki (Pisces: Cichlidae) from cenotes (= sinkholes) of the Yucatan Peninsula, Mexico

MendozaFranco EF, Scholz T, VidalMartinez VM

Folia Parasitologica 44[3] 205-208 (1997)

Sciadicleithrum meekii sp. n. is described from the gills of the cichlid fish Cichlasoma meeki (Brind) from cenotes (= sinkholes) of the Yucatan Peninsula, Mexico. The new species differs from congeners by having a dorsal hamuli with a prominent superficial root articulated with a straight shaft and curved point, and a vagina with a coiled tube comprised of one ring.

New observations on seuratoid nematodes parasitic in fishes of the Parana River, Brasil

Moravec F, Kohn A, Fernandes BMM

Folia Parasitologica 44[3] 209-223 (1997)

The present paper comprises a systematic survey of nematodes of the superfamily Seuratoidea collected from fishes of the Parana River, southern Brazil, in 1992-1995. The following species were recorded: Neoparaseuratum travassosi Moravec, Kohn et Fernandes, 1992, Spectatus sp., Seuratoidea gen. sp. larvae, Cucullanus brevispiculus Moravec, Kohn et Fernandes, 1993, C. pinnai pinnai Travassos, Artigas et Pereira, 1928, C. pinnai pterodorasi subsp, n., C. rhamphichthydis sp. n., C. zungaro Vaz et Pereira, 1934, and Dichelyne pimelodi sp. n. C. pinnai pterodorasi (type host Pterodoras granulosus) differs from C. p. pinnai in the shape of the oesophagus...

Acanthocephalans of the family Centrorhynchidae (Palaeacanthocephala) from Bulgaria

Dimitrova ZM, Georgiev BB, Genov T

Folia Parasitologica 44[3] 224-232 (1997)

Five species of acanthocephalans of the family Centrorhynchidae are recorded from birds in Bulgaria: Centrohynchus amphibius Das, 1950 from Buteo, buteo (L.) (new host record), C. globocaudatus (Zeder, 1800) Luhe, 1911 from Falco tinnunculus L. and F. vespertinus L. (new host record), Sphaerirostris picae (Rudolphi, 1819) Golvan. 1960 from Pica pica (L.) and Lanius excubitor L. (new host record), S. lancea (Westrumb, 1821) Golvan. 1960 from Vanellus vanellus (L.), and S. turdi (Yamaguti, 1939) Golvan, 1960 from Turdus merula L., Cinclus cinclus (L.) (new host record)and Sturnus vulgaris L. (new host record). New geographical record far Europe is this...

Occurrence of cystacanths of Polyacanthorhynchus kenyensis larvae (Acanthocephala) in four teleostean fishes from a tropical lake, Lake Naivasha, Kenya

Aloo PA, Dezfuli BS

Folia Parasitologica 44[3] 233-238 (1997)

From January 1992 to December 1993, a total of 2158 fish, namely Oreochromis leucostictus (Trewavas, 1983), Micropterus salmoides (Lacepede, 1802), Tilapia zillii (Gervais, 1848) and Barbus amphigrama (Boulenger, 1902) were sampled from thirteen stations on Lake Naivasha, Kenya, using a fleet of gill nets and examined for helminth parasites. The prevalence of infection due to cystacanths of an acanthocephalan, Polyacanthorhynchus kenyensis Schmidt et Canaris, 1967 among parasitized O. leucostictus ranged from 30.4 to 86.9%; among T. zillii from 4.1 to 77.7%; in M, salmoides from 20 to 50%; and in B, amphigrama from 5.8 to 100%. In 735 hosts belonging...

Two gynandromorphs of Ixodes (Ixodes) pacificus (Acari: Ixodidae) from California, USA

Keirans JE, Lane RS

Folia Parasitologica 44[3] 239-240 (1997)