Folia Parasitologica, vol. 34 (1987), issue 4

Effect of variation in temperature on development of Plasmodium berghei (NK 65 strain) in Anopheles stephensi.

M Rastogi, N L Pal, A B Sen

Folia Parasitologica 34[4] 289-297 (1987)

Effect of temperature on the sporogonic cycle of Plasmodium berghei (NK 65) has been studied in vector Anopheles stephensi. To determine the optimum temperature for development of parasite, fed mosquitoes were kept at 16 +/- 1 degree C, 19 +/- 1 degree C and 26 +/- 1 degree C temperature. The temperature 19 +/- 1 degree C was found to be optimum for normal development of parasite within the vector. Sporulated oocysts were observed on the 10th day post feed and salivary glands were loaded with thousands of sporozoites on day 14. Temperature 16 +/- 1 degree C, though did not exert any deleterious effect on the morphology of parasites it delayed the development...

Pathology and pathogenicity of Eimeria scabra (Henry, 1931) in experimentally infected pigs.

J Vítovec, B Koudela, J Sterba

Folia Parasitologica 34[4] 299 (1987)

Pathology and pathogenicity of the coccidium Eimeria scabra were studied in pigs experimentally infected at 1-2 months of age. Two phases were evident in the course of pathogenic process. In the first phase, 7-8 days after inoculation (DAI), caudal jejunum and ileum were affected by a severe catarrhal inflammation characterized by intensive infiltrate containing numerous neutrophils and eosinophils, vigorous activation of Peyer's patches, villous fusion and general atrophy of epithelium. In the second phase, 9 DAI, release of immature oocysts was associated with break-down of the epithelial barrier and development of pseudomembranes. Reparative and...

Experimental verification of the effect of the form (scaly or scaleless) of carp host (C. carpio L.) on the growth rate of micropopulations of Gyrodactylus katharineri Malmberg, 1964 (Monogenea).

M Gelnar

Folia Parasitologica 34[4] 305-309 (1987)

It was demonstrated that the growth rate of Gyrodactylus katharineri micropopulations parasitizing the fry of Cyprinus carpio L. was effected by water temperature and by the form of the fish host (scaly or scaleless). At lower water temperature (12 degrees C) the number of parasites increased in both host forms approximately at the same intensity. In warmer water (18 degrees C), the parasites reproduced intensively only on the scaly form of fish, whereas no parasites were found on the scaleless form some days after infection.

Regulation of Dermacentor variabilis by limited dispersion of larvae from the egg mass (Acari: Ixodidae).

W D McEnroe, H B Specht

Folia Parasitologica 34[4] 309-310 (1987)

Ultrastructure of a new type of sensory ending in Echinostoma revolutum cercaria (Trematoda: Echinostomatidae).

Z Zdárská, V Nasincová, J Sterba, J Valkounová

Folia Parasitologica 34[4] 311 (1987)

Two pairs of hitherto unknown multiciliate sensory endings have been demonstrated in free-swimming cercariae of Echinostoma revolutum using transmission and scanning electron microscopy. This type of receptor consists of a bundle of 36--40 short, conically projecting cilia ensheathed by a collar formed by a circular evagination of tegument in shape of a cup. The cilia projecting from the centre of a widened nerve fibre, filled with electron-lucid vesicles, possess a well developed basal body and do not contain a ciliary rootlet. The function of this receptor is discussed.

Interference with homologous immunity and faecal egg excretion in Schistosoma infections in mice concurrently infected with Trypanosoma brucei and Schistosoma mansoni.

B O Fagbemi

Folia Parasitologica 34[4] 317-322 (1987)

The effects of the blood protozoan, Trypanosoma brucei, was assessed on the homologous immunity to Schistosoma mansoni infection and the distribution of S. mansoni eggs in the tissues and faeces of dually infected mice. The trypanosome infection reduced the homologous protection induced by a primary S. mansoni infection against a challenge infection and the faecal excretion of eggs during the primary schistosome infection. The findings are discussed in relation to the immunosuppressive action of Trypanosoma infection.

Studies on the properties of malic enzyme and malate dehydrogenase from Taenia crassiceps (Zeder, 1800) cysticerci.

J Zenka, P Kopácek, N Vokurková

Folia Parasitologica 34[4] 323-328 (1987)

It has been studied what type (or types) of malic enzyme is present in the mitochondria of Taenia crassiceps cysticerci. Only NADP-dependent malic enzyme (EC was demonstrated. The method of isoelectric focusing was used for the detection of isoenzymes of malic enzyme and malate dehydrogenase in the cytoplasm and mitochondria of T. crassiceps cysticerci. The mitochondria contain 5 isoenzymes of malic enzyme and 5 isoenzymes of malate dehydrogenase. The cytoplasm contains 7 isoenzymes of malic enzyme (3 of them are identical with those from the mitochondria) and 7 isoenzymes of malate dehydrogenase (5 of them are identical with those from the...

Dependency of resistance of mice immunized against Taenia crassiceps on the dose of soluble antigen.

S Lukes

Folia Parasitologica 34[4] 329-333 (1987)

Mice immunized with a single dose (1.25-40 micrograms/mouse) of soluble antigen from Taenia crassiceps cysticerci developed a 62.9-85.0% resistance. Maximum effect was achieved in the groups immunized with 40 micrograms and 20 micrograms of antigen. The dose of 5 micrograms induced the lowest number of successful infections (28.6%), but the mean number of surviving larvae was higher than in the above groups.

Daniconema anguillae gen. et sp. n., a new nematode of a new family Daniconematidae fam. n. parasitic in European eels.

F Moravec, M Koie

Folia Parasitologica 34[4] 335 (1987)

A new nematode genus and species, Daniconema anguillae gen. et sp. n., is described from the serosa of the swimbladder and from the intestine of eels (Anguilla anguilla (L.] from Denmark (Lake Esrum, northern Zealand); a new family Daniconematidae fam. n. is established to accommodate it. The hitherto monotypic family Daniconematidae shows affinities with the Skrjabillanidae; in contrast to the latter, the new family is characterized by the absence of a buccal capsule, by the presence of anus in the female, and by different structure of the male tail (shape of the tail, absence of bursa-like caudal alae, number and distribution of papillae, presence...

Effect of vitamins on Trichinella pseudospiralis Garkavi, 1972 infection in mice.

V Figallová, J Prokopic

Folia Parasitologica 34[4] 341-346 (1987)

The effects of vitamins A, B complex, E, and ADE on the eosinophilia, body weight, number of obtained larvae and distribution of larvae of Trichinella pseudospiralis were examined in mice. The increased eosinophilia started to appear in the majority of infected mice from day 7 p.i., the maximum being around day 21 p.i. The highest values of eosinophilia were observed in the mice after application of vitamin B complex. In spite of considerable individual differences, the greatest decrease in body weight occurred in mice receiving vitamins E and B complex. The greatest numbers of larvae were obtained from mice receiving vitamins E and B complex, which...



Folia Parasitologica 34[4] 347-355 (1987)

Dispersal in patchy environments: effect on the prevalence of small mammal ectoparasites.

L Lundqvist, A Edler

Folia Parasitologica 34[4] 357-367 (1987)

Part-time ectoparasites on small mammals disperse via the habitat, while full-time parasites spread throughout the host population by direct contacts between host animals. It is therefore supposed that the effect of the natural environment is different for the two groups. This was studied as differences between observed and expected prevalence, the percentage of the infested host population, during different environmental conditions. Two possible mechanisms of such an effect were analysed, i.e. a) host selection and its change with host frequency and b) parasite migration and reproduction rates as reflected by the frequency distribution patterns on...

Fluorescence-microscopic visualization of chitin structures in egg shells of Ascaris lumbricoides.

D Sromová, M Hejtmánek

Folia Parasitologica 34[4] 367 (1987)

Encounter the poultry red mite resistance to acaricides in Czechoslovak poultry-farming.

P Zeman

Folia Parasitologica 34[4] 369-373 (1987)

Poultry red mite susceptibility to permethrin, deltamethrin, tetramethrin, trichlorfon, fenitrothion, carbaryl and DDT, respectively, was screened within the territory of Bohemia by a method of diagnostic doses. The survey indicated widely spread resistance to DDT; in a few cases ineffectivity of permethrin, tetramethrin and trichlorfon, respectively, was also documented.

Brain thelohanellosis due to Thelohanellus oculileucisci (Myxozoa: Myxosporea) in Gobio gobio.

J Lom, M Pavlásková, I Dyková

Folia Parasitologica 34[4] 375 (1987)

The first case of a Thelohanellus infection in the brain of gudgeons (Gobio gobio) is described. The infection was found on three localities in southern Bohemia, Czechoslovakia. The spores measured 13.2-14.4 x 6.3-7.1 micron. The reasons are discussed for which the species was identified as T. oculileucisci Trojan, 1909.

Natural cryptosporidiosis in a piglet suffering from pseudomembranous typhlitis.

J Vítovec, B Koudela

Folia Parasitologica 34[4] 378 (1987)



Folia Parasitologica 34[4] 379 (1987)