Folia Parasitologica, vol. 39 (1992), issue 2

LIFE-CYCLE AND ULTRASTRUCTURE OF EIMERIA-STIGMOSA, THE INTRANUCLEAR COCCIDIAN OF THE GOOSE (ANSER-ANSER-DOMESTICUS)

PECKA Z

Folia Parasitologica 39[2] 105-114 (1992)

The oocyst morphology and endogenous development of Eimeria stigmosa Klimes 1963 in a domestic goose (Anser anser domesticus L.) was studied using light and electron microscopy. The oocyst wall consisted of two layers. The outer layer formed densely accumulated protrusions, whilst the inner layer was smooth and formed a collar structure around the micropyle. Meronts were observed in the posterior part of the jejunum, along the whole length of the ileum and in Meckel's diverticulum within 1-4 days post infection (DPI). Sexual generation was found in the caecum and colon 4-5 DPI. All endogenous stages were located intranuclearly in enterocytes, predominantly...

KARYOLOGICAL INVESTIGATIONS OF CARYOPHYLLAEUS-LATICEPS (PALLAS, 1781) (CESTODA, CARYOPHYLLIDEA)

PETKEVICIUTE R, KUPERMAN BI

Folia Parasitologica 39[2] 115-121 (1992)

Mitotic and meiotic chromosomes of Caryophyllaeus laticeps (Pallas) from Rybinsk reservoir were studied using air-drying techniques. it was established that the diploid set contains 20 metacentric chromosomes. The chromosomes are large - their mean absolute length ranges from 3.00 to 12.90-mu-m. The last pair of small homologues comprises only 3.4 % of the total length of the complement. One specimen of C. laticeps with 2n = 21 (trisomic after the last pair of chromosomes) and one triploid specimen with 3n = 31 is described. Data on the comparative karyology of caryophyltids are discussed.

COMPARATIVE MORPHOLOGY OF EGGS OF THE HAPLORCHIINAE (TREMATODA, HETEROPHYIDAE) AND SOME OTHER MEDICALLY IMPORTANT HETEROPHYID AND OPISTHORCHIID FLUKES

DITRICH O, GIBODA M, SCHOLZ T, BEER SA

Folia Parasitologica 39[2] 123-132 (1992)

The egg morphology of the following medically important small flukes from Southeast Asia and Far East were studied: Opisthorchis viverrini, Clonorchis sinensis (Opisthorchiidae), Haplorchis taichui, H.pumilio, H. yokogawai, Stellantchasmus falcatus and Metagonimus sp. (Heterophyidae). This study revealed a great intraspecific variability and interspecific similarity in size and shape of eggs. The eggs shape does not seem to be suitable for species identification. On the other band, biometrical analysis of egg size enabled us to divide eggs from the species studied into four distinct groups according to the Faust-Meleney index (FMI) characterizing egg...

OBSERVATIONS ON THE BIONOMY OF ALLOCREADIUM-ISOPORUM (LOOSS, 1894) (TREMATODA, ALLOCREADIIDAE)

MORAVEC F

Folia Parasitologica 39[2] 133-144 (1992)

From October 1985 until July 1987, the bionomy of the trematode Allocreadium isoporum (Looss, 1894) was studied in the Rokytna River (the Danube basin), Czechoslovakia. While clams of the genera Sphaerium Scopoli and Pisidium Pfeiffer apparently serve as its first intermediate hosts, mayfly larvae Ephemera danica Mull. were found (prevalence 8 %, intensity 1-5 metacercariae per mayfly) to be the only second intermediate host of A. isoponon in the locality. The most important definitive host is chub, Leuciscus cephalus (L.), in which the seasonal dynamics of A. isoporum occurrence and maturation was followed. The parasite exhibits here a distinct seasonal...

A SCANNING ELECTRON-MICROSCOPE STUDY OF RAILLIETASCARIS-VARANI (BAYLIS ET DAUBNEY, 1922) (NEMATODA, ASCARIDIOIDEA)

DE NC, DEY J

Folia Parasitologica 39[2] 145-151 (1992)

The Raillietascaris varani (Baylis et Daubney, 1922), parasitic in the Indian monitor lizard, Varanus monitor (L.), was studied by scanning electro microscopy (SEM). A surface topography of the worm, especially the head and male tail, were described, illustrated and discussed with regard to the available data on this species, and also other species of ascaridoid nematodes. The present study confirms the previous observations from Sprent (1985), and also provides some additional information concerning the microtopography of the worm which might be useful in comparative studies on the Ascaridoidea.

HELMINTH EGGS IN THE SLUDGE FROM 3 SEWAGE-TREATMENT PLANTS IN CZECHOSLOVAKIA

HORAK P

Folia Parasitologica 39[2] 153-157 (1992)

Developmental stages of 8 species of parasitic helminths were found during examination of sludge from 3 sewage treatment plants in Central Bohemia, Czechoslovakia. The eggs were comprised from Ascaris sp., Toxocara sp., Toxascaris leonina, Parascaris equorum, Enterobius vermicularis, Trichuris sp., Capillaria sp. and Hymenolepis spp. The quantity of these organisms in 100 g of dried sludge ranged between 24-105 eggs of Ascaris sp., 12-47 eggs of Toxocara sp., 0-8 eggs of Toxascaris leonina, 0-1 egg of Parascaris equorum, 2-33 eggs of Trichuris sp., 0-12 eggs of Capillaria sp., 0-46 eggs of Enterobius vermicularis and 0-49 eggs of Hymenolepis spp. Some...

ARTHROPODS IN A HOSPITAL AND THEIR POTENTIAL SIGNIFICANCE IN THE EPIDEMIOLOGY OF HOSPITAL INFECTIONS

DANIEL M, SRAMOVA H, ABSOLONOVA V, DEDICOVA D, LHOTOVA H, MASKOVA L, PETRAS P

Folia Parasitologica 39[2] 159-170 (1992)

Synanthropic and other arthropods were collected and examined for microbes in the summer seasons of 1988 and 1990. The collection was performed in a Praque hospital with departments situated in separate buildings, each surrounded by a park. In 1988, the most attention was given to flies (35 species collected) found outside between the buildings. In 1990, all arthropods found inside the buildings (particularly in the departments of dermatology and urology) were studied. A total of 30 taxons were identified. The microbes found on the bodies of arthropods were isolated in both seasons. In 1990, the hospital environment and biological material from patients...

HOST SUBSTITUTION BY IXODES-PERSULCATUS (ACARI, IXODIDAE) LARVAE IN THE YEARS OF DEEP DEPRESSION IN THE ABUNDANCE OF SMALL MAMMALS

USPENSKY I, RUBINA M

Folia Parasitologica 39[2] 171-176 (1992)

A phenomenon of host substitution by the taiga tick (Ixodes persulcatus) larvae was observed by the authors in the western part of the Soviet Far East. In the montain forests where the highest abundance of L persulcatus was found, larvae usually fed on small mammals (primarily on Clethrionomys rufocanus, C rutilus and Apodemus speciosus). Numerous larvae were found, however, on the mountain hare (Lepus timidus) in the years of deep depression in the abundance of small mammals. The host substitution is considered as one of the mechanisms stabilizing the abundance of I. persulcatus adults.

TOXOPLASMIC ANTIBODIES IN SERA OF HIV-INFECTED PERSONS

SYKORA J, ZASTERA M, STANKOVA M

Folia Parasitologica 39[2] 177-180 (1992)

The sera of 67 HIV-infected persons without clinical signs of Toxoplasma gondii infection and sera of 777 immunocompetent persons from three distinct regions of Czechoslovakia were examined for the presence of toxoplasmic antibodies using the complement-fixation test (CFT). Additionally Toxoplasma positive HIV+ individuals were re-examined for the presence of IgG and IgM toxoplasmic antibodies by ELISA methods. Results show that overall prevalence of toxoplasmic antibodies is not significantly greater in HIV-positive subjects (29.8 %) than in the general population (26.1 %). Similarities between these two tested groups were also documented by a close...

STEINERNEMA-KRAUSSEI (STEINER, 1923) (NEMATODA, RHABDITIDA) - REDISCOVERY OF ITS TYPE LOCALITY IN GERMANY

MRACEK Z, WEISER J, BURES M, KAHOUNOVA L

Folia Parasitologica 39[2] 181-182 (1992)