Folia Parasitologica, vol. 29 (1982), issue 1

Studies by electron microscopy of the giant forms of some African and South American trypanosomes found other than within their mammalian host.

D S Ellis, D A Evans, S Stamford

Folia Parasitologica 29[1] 5-11 (1982)

Giant multinucleate cyst forms of 3 brucei group trypanosomes and 2 South American species were found in culture systems and within the insect host cells by electron microscopy; the African stocks within the tsetse mid-gut cells, an unidentified Brazilian trypanosome within the bug's gut cells and Trypanosoma rangeli within the muscle layers surrounding the bug's salivary gland. The various forms found were similar in that they contained varying numbers of large vacuoles, usually lined by subpellicular tubules into which appeared to bud the various organelles seen in normal trypanosomes and which were produced in considerable numbers within the body...

REVISION OF NEMATODES OF THE GENUS CAPILLARIA ZEDER, 1800 FROM EUROPEAN CAUDATE AMPHIBIANS

F MORAVEC, V V LOMAKIN

Folia Parasitologica 29[1] 13-23 (1982)

Parasitological investigation of children's sand boxes and dog faeces from public areas in old housing districts of Prague.

J Valkounová

Folia Parasitologica 29[1] 25-32 (1982)

Eggs and oocysts of 11 species of parasites were recorded in 21 of 50 sand boxes (200 samples) and in 66 (13.2%) of 500 dog faeces samples from parks and grassy areas in Prague. Toxocara canis was found in 12 sand boxes and in 4.2% of faeces samples and T. cati in one sand box and one sample of dog faeces.

MORPHOLOGICAL-STUDY OF PELODERA TERES SCHNEIDER, 1866 BY SCANNING ELECTRON-MICROSCOPY

S LUKES, J PROKOPIC, D HULINSKA

Folia Parasitologica 29[1] 33-36 (1982)

The ultrastructure of the reproductive system, and the oogenesis of two day-old, fertilized females of Trichinella spiralis and T. nativa.

D Hulínská, B Shaikenov

Folia Parasitologica 29[1] 39-44 (1982)

The authors observed no difference in the ultrastructural topography of the female reproductive system of T. nativa and T. spiralis, and in the oogenesis. There were both dense and lucid areas produced by invaginations of the oolemma in the cytoplasm of primary oocytes. The oolemma contained fibril-covered microvilli. Large granules differentiated in mature oocytes by an incorporation of smaller granules into transparent areas of the cytoplasm which became membrane-bound. The sheath covering oocytes originated from a dense fibrous substance surrounding the granules before oocytic fertilization. Oral sperms in the spermatheca of T. nativa could be distinguished...

Ultrastructure of the hatched and unhatched oncospheres of Taenia saginata.

J Schramlová, K Blazek

Folia Parasitologica 29[1] 45-50 (1982)

The ultrastructure of the oncospheres of Taenia saginata after treatment with artificial gastric juice is described. After the treatment with the gastric juice, the oncosphere remains in the embryophore. Finger-like processes are formed on the membrane separating the granular layer of embryophore from the oncospheral membrane and micropores arise in the outer unit membrane of the oncospheral membrane. After the treatment with the intestinal juice, the embryophore disintegrates. The oncospheral membrane is again without pores and it is shed off after induction of active movement of the oncosphere. The activity of penetration glands increases: in the...

The incidence and mode of scabies transmission in a district of Czechoslovakia (1961-1979).

P Palicka

Folia Parasitologica 29[1] 51-59 (1982)

An epidemiological analysis was carried out of more than 11 thousand cases of scabies reported in 1961-1979 in the district of Karviná, Czechoslovakia. The paper presents analyses of the incidence of scabies in different age groups of patients divided according to sex and occupation and the results of the epidemiological investigations in family foci. A special attention is paid to the problems of spread of infection in the human population, including the detection of the source and mode of transmission in patients with microscopically confirmed diagnosis. The results obtained serve as a basis for the proposed practical control measures.

PHEROMONE-REGULATED AGGREGATION IN LARVAE, NYMPHS AND ADULTS OF IXODES-RICINUS (L) (ACARINA, IXODIDAE)

Z HAJKOVA, M G LEAHY

Folia Parasitologica 29[1] 61-67 (1982)

Diurnal flying activity and nutrition ecology of hydrotaea armipes fall. (Diptera, Muscidae).

F Gregor, F Dusbábek

Folia Parasitologica 29[1] 69-78 (1982)

The activity of the fly Hydrotaea armipes Fall. alighting on the lachrymous eyes of calves was observed. The flies were active throughout the day at the temperature higher than 12 degrees C, their activity inside the stable being about directly proportional to their activity in the paddocks. The numbers of active females indoors reached 0.08-17.3% of the number of active females in the paddocks. The flight range of females from paddocks or buildings for the housing of calves was no more than 10-20 m. The authors presume that the alighting H. armipes females orientate themselves to a greater distance (more than 5 m) visually, while in the approaching...

The role of Hydrotaea armipes Fall. (Diptera, Muscidae) in the transmission of infectious bovine keratoconjunctivitis.

F Dusbábek, A Soukupová, F Gregor, J Krejcí

Folia Parasitologica 29[1] 79-83 (1982)

The tests to isolate the IBK causative agent Moraxella bovis from the flies Hydrotaea armipes Fall., captured while feeding on tears in the eye region of infected calves, have failed. Many successful isolations of Branhamella catarrhalis from the digestive tract of the flies and the smears taken from the eyes of the infected calves indicate that this agent is acquired by the flies while sucking tears from the eyes of the sick animals. A similar transmission is presumed by the authors with Moraxella bovis. In experiment this bacterium survives on the body surface of Hydrotaea armipes for 14 hours, in the digestive tract for 15 hours and even longer.

Possible role of birds and ticks in the dissemination of Bhanja virus.

Z Hubálek, V Cerný, P Rödl

Folia Parasitologica 29[1] 85-95 (1982)

Several wild birds (4 Fringilla coelebs, 1 Coccothraustes coccothraustes and 2 Erithacus rubecula) were inoculated subcutaneously with Bhanja virus (BHAV). No clinical symptoms of infection were observed in any of the birds; a low viremia was demonstrated only in C. coccothraustes (2 and 4 days p.i.), seroconversion in all birds. BHAV was not isolated from organs 32 days p.i. Consequently, the tested birds do not seem to serve as "amplifying hosts" of BHAV. The paper includes a survey of geographic distribution of Bhanja virus and a list of its vectors. A hypothesis on the indirect dissemination of BHAV by birds by means of infected ticks is discussed....

Hirstionyssus apodemi Zuevsky, 1970 and Eulaelaps oudemansi Turk, 1945 (Acarina, Parasitiformes) - first record in Czechoslovakia

M KOHN

Folia Parasitologica 29[1] 95-96 (1982)