Folia Parasitologica, vol. 39 (1992), issue 1

EFFECTS OF TEMPERATURE ON THE INVIVO AND INVITRO MULTIPLICATION OF TRYPANOSOMA-DANILEWSKYI LAVERAN ET MESNIL

AKMN ISLAM, PTK WOO

Folia Parasitologica 39[1] 1-12 (1992)

Temperature directly affected the in vivo and in vitro multiplication of Trypanosoma danilewskyi Laveran et Mesnil. The parasitemia in experimentally infected goldfish (Carassius auratus L.) increased rapidly at 20-degrees-C and reached its peak in 3 to 5 weeks post-infection. The multiplication was slower at 10-degrees-C. The parasitemia declined after the peak at 20-degrees-C. Lowering of temperature of the infected goldfish from 20-degrees-C to 10-degrees-C slowed multiplication of the parasite. Similarly, raising of temperature of infected fish from 10-degrees-C to 20-degrees-C resulted in rapid multiplication of the parasite. These were confirmed...

THE LIFE-CYCLE OF EIMERIA-DANAILOVI FROM DUCKS

PECKA Z

Folia Parasitologica 39[1] 13-18 (1992)

The life cycle of Eimeria danailovi Grafner, Graubmann et Betke in experimentally infected ducks was studied by optical microscopy. The asexual generation developed in the posterior part of jejunum and in the whole ileum. The sexual stages occurred in jejunum and ileum, and, in addition, in cecum and colon. All endogenous stages were localized in the cytoplasm of epithelial cells in the apical and basal parts of villi. Two generations of meronts were found to develop, differing from one another in the number of merozoites. The meronts of the first generation were observed 2 days post infection (DPI) and contained 10-14 (on the average 11) merozoites....

FINE-STRUCTURE OF SPERMATOGENESIS IN MONOPISTHOCOTYLEAN MONOGENEANS (MACROGYRODACTYLUS-POLYPTERI - PSEUDODACTYLOGYRUS-BINI)

G SCHMAHL, M ELWASILA

Folia Parasitologica 39[1] 19-31 (1992)

The development of spermatozoa in the monopisthocotylean fish gill flukes, Macrogyrodactylus polypteri Malmberg and Pseudodactylogyrus bini Kikuchi was investigated by means of light and transmission electron microscopy. In M. polypteri spermatogonia give rise by successive mitoses to primary spermatocytes clearly characterized by the presence of synaptonemal complexes. In M. polypteri, spermatocytes are characterized by a fine, dense intranuclear inclusion connected by a small strand to the nuclear membrane, and by the appearance of several Golgi complexes. Both in M. polypteri and P. bini a syncytial mass of spermatids develops, which gives rise...

MEXICONEMA-CICHLASOMAE GEN-ET SP (NEMATODA, DANICONEMATIDAE) FROM CICHLASOMA-SPP (PISCES) FROM MEXICO

MORAVEC F, VIDAL V, MALDONADO GS

Folia Parasitologica 39[1] 33-40 (1992)

A new nematode genus and species, Mexiconema cichlasomae gen. et sp. n., is described from the abdominal cavity, viscera (mesenteries, swimbladder, liver, spleen, kidneys, intestinal lumen, serose cover of intestine) and rarely the skin below the scales of four species of cichlids, Cichlasoma urophthalmus (type host), C. helleri, C. motaguense and C. pearsei from the salt water coastal lagoon Celestun (N. Yucatan) (type locality) and several other freshwater, salt water and marine localities from Mexico. This dracunculoid nematode species represents a new genus of the recently established, hitherto monotypic family Daniconematidae. The new genus Mexiconema...

MORPHOLOGY OF THE UTERUS OF ASCARIS-LUMBRICOIDES IN THE REGION WHERE FERTILIZATION AND FORMATION OF EGGSHELL OCCUR

H LYSEK, J ONDRUS

Folia Parasitologica 39[1] 41-50 (1992)

Morphology of the female reproductive system of Ascaris lumbricoides L. was studied in the region starting with the junction between the oviduct and the uterus (O-U) up to the junction of both uterine branches into the vagina with regard to the process of fertilization and formation of egg-shells. In the O-U junction morphology differed in two following sections: a continuous simple squamous up to simple cuboidal epithelium, and simple cuboidal up to columnar epithelium with broad intercellular spaces leading into the lumen of the tubular reproductive organ filled with sperm. The area in the O-U junction zone was found where the wall of the organ was...

BRUGIA-MALAYI IN MASTOMYS-NATALENSIS - EFFICACY OF MEBENDAZOLE IN COMBINATION WITH FREUND COMPLETE ADJUVANT

PK MURTHY, K TYAGI, RK CHATTERJEE

Folia Parasitologica 39[1] 51-59 (1992)

The chemotherapeutic efficacy of mebendazole given in combination with Freund's complete adjuvant (FCA) against Brugia malayi in multimammate rat was evaluated. Animals treated with mebendazole, orally at 200 mg/kg x 5 consecutive days along with FCA given subcutaneously (s.c.) on day -10, day 0 and day + 15 of the drug treatment killed 48.51 % of the adult worms. This drug given alone at the same regimen and by the same route showed only 18.7 % mortality rate on adults. Mebendazole given intraperitoneally along with FCA given s.c., however, was four times more efficacious as filaricide than mebendazole alone. Nevertheless, the animals receiving FCA...

ON THE MECHANISM OF PENETRATION OF OVICIDAL FUNGI THROUGH EGGSHELLS OF PARASITIC NEMATODES - DECOMPOSITION OF CHITINOUS AND ASCAROSIDE LAYERS

J KUNERT

Folia Parasitologica 39[1] 61-66 (1992)

The decomposition of egg-shells of Ascaris lumbricoides L. was studied microscopically using topochemical methods in a set of 32 strains of soil ovicidal fungi. It was found that even fungi displaying minimal chitinolytic activity in tests on purified chitin in vitro are able to dissolve chitin of egg-shells during the attack on live eggs. Fungi without any chitinolytic activity penetrate probably only the mechanically damaged eggs. None of the studied fungi was capable of degrading enzymatically the glycolipid (ascaroside) layer of the egg-shell which remained after digestion of all other components of the egg.

EWINGANA (DOREYANA) BAEKELANDAE, SP-N, A PARASITE OF MOLOSSID BATS IN SPAIN (ACARI, MYOBIIDAE)

A ESTRADA-PENA, J DE-LA-CRUZ

Folia Parasitologica 39[1] 67-73 (1992)

Ewingana (Doreyana) baekelandae sp. n. (Acari: Myobiidae) is described on the basis of several adults and immatures collected on Tadarida (T.) teniotis from the province of Teruel, Spain. The species is a Palearctic representative of the evolutive line nanula Fain and digitata Fain. Differences within these species are observed in the female genito-anal area and in the shape and size of leg I, both in adults and in immatures.

PROBABILITY DESCRIPTION OF REGULATION ON THE LEVEL OF POPULATION AND INDIVIDUAL IN THE HOST-PARASITE SYSTEM USING ESTRUS-OVIS (DIPTERA, OESTRIDAE) AS AN EXAMPLE

A G BART, J MINAR

Folia Parasitologica 39[1] 75-83 (1992)

A scheme of a mixture of normal laws of weight distribution in Oestrus ovis L. larvae of various stages was used for the determination of their mortality and for the evaluation of basic distribution parameters. No mortality was observed in 2nd- and 3rd-stage larvae. The distribution of the number of 1st-stage larvae corresponds to the negative binomial law. The weight distribution correlates with the quantitative distribution of the 1st-stage larvae. The present studies are based on the results obtained during the investigations of ovine oestrosis in Stavropol Territory of the RSFSR and the Kalmyk ASSR performed by K. A. Breev and his coworkers in 1976-77.

SOME CHARACTERISTICS OF SARCOCYSTIS SPP FOUND IN THE MUSCLES OF SHEEP

SCHMIDTOVA D

Folia Parasitologica 39[1] 83-84 (1992)

PROBABILITY-MODELS OF THE RATE OF INFECTION WITH TICK-BORNE ENCEPHALITIS-VIRUS IN IXODES-PERSULCATUS TICKS

E I KORENBERG, M HORAKOVA, J V KOVALEVSKY, Z HUBALEK, A S KARAVANOV

Folia Parasitologica 39[1] 85-92 (1992)

A total of 3,254 adults of Ixodes persulcatus tick were collected in a taiga forest habitat situated in the Amgun river basin (Khabarovsk region, the Far East, USSR) and examined individually for the presence and amount of tick-borne encephalitis virus. The over-all proportion of infected ticks was 6.6 % and it varied between 3.4 % and 9.4 % in the years 1982 to 1985. The amount of virus per tick was approximated by the gamma distribution determining a probability that the number of plaque-forming units (PFU) per tick is not greater than a selected value. The frequency distribution of infected ticks followed a model of the negative binomial distribution,...

APONOMMA-ORLOVI SP-N - A NEW SPECIES OF IXODID TICKS (ACARINA, IXODIDAE) FROM VIETNAM

G V KOLONIN

Folia Parasitologica 39[1] 93-94 (1992)