Folia Parasitologica, vol. 38 (1991), issue 2

THE CHEMOTHERAPY OF MONOGENEANS WHICH PARASITIZE FISH - A REVIEW

G SCHMAHL

Folia Parasitologica 38[2] 97-106 (1991)

Monogeneans which parasitize fish are still treated by bathing the fish in solutions of simple chemicals or staining dyes. In the early 1960s an insecticide, trichlorphon, replaced to a large extent the formerly used simple chemicals. Its success was greater specificity against monogeneans and other ectoparasites, and to its great tolerance by the fish. The fact that the number of important monogenean species (i.e. Pseudodactylogyrus anguillae, P. bini, Gyrodactylus salaris) which cannot be treated sufficiently with simple chemicals or even trichlorphon is increasing, led to the need for systemically acting, novel chemotherapeutics. In laboratory and...

DIFFERENTIATION OF SPECIES OF EIMERIA FROM THE FOWL USING A COMPUTERIZED IMAGE-ANALYSIS SYSTEM

J KUCERA, M REZNICKY

Folia Parasitologica 38[2] 107-113 (1991)

Oocysts of Eimeria species from the fowl have been identified using a computerized image-analysis system (Leitz T.A.S. Plus Image-Analyser). The system enabled semiautomatic measurement of oocyst dimensions with subsequent species diagnosis based on graphic statistical evaluation of size and shape of measured parasites. E. mitis, E. acervulina, E. brunetti, E. maxima, E. tenella and complex of E. necatrix and E. praecox were distinguishable both in pure cultures and in mixtures. It was not possible to distinguish E. praecox from E. necatrix using this system.

PREDATION OF TICKS OF THE RHIPICEPHALUS-SANGUINEUS (LATREILLE, 1806) GROUP AND BOOPHILUS-MICROPLUS (CANESTRINI, 1888) (ACARI, IXODIDAE) BY NOTHURA TEMMINCK, 1815 (AVES, TINAMIDAE) IN SALTA, ARGENTINA

AA GUGLIELMONE, SG MOSA

Folia Parasitologica 38[2] 114 (1991)

MORPHOLOGY AND DEVELOPMENT OF NOSEMA-SERBICA WEISER, 1963 (MICROSPORA, NOSEMATIDAE), PARASITE OF THE GYPSY-MOTH LYMANTRIA-DISPAR (LEPIDOPTERA, LYMANTRIIDAE)

D PILARSKA, J VAVRA

Folia Parasitologica 38[2] 115-121 (1991)

Morphological data completing the description of Nosema serbica Weiser, 1963 are presented. The parasite has binucleate, tetranucleate and octonucleate diplokaryotic meronts, binucleate and tetranucleate diplokaryotic sporonts and binucleate sporoblasts and spores. Living spores are oval, measuring 5.24 x 2.4-mu-m. Polar tube is isofilar with 8-9 coils. It is confirmed that the parasite is transovarially transmitted and causes significant mortality of its host. It infects almost all tissues and organs of gypsy moth caterpillars with the exception of salivary glands, midgut epithelium and hypodermis, causing an inflammatory reaction in its host manifested...

EXPERIMENTAL-VERIFICATION OF THE EFFECT OF CONSTANT AND CHANGING WATER TEMPERATURE ON THE MICROPOPULATION GROWTH IN GYRODACTYLUS-GOBIENSIS GLASER, 1974 (MONOGENEA) PARASITIZING GUDGEON (GOBIO-GOBIO L)

M GELNAR

Folia Parasitologica 38[2] 123-131 (1991)

It has been verified under laboratory conditions that constant and changing water temperature markedly affects the micropopulation growth in Gyrodactylus gobiensis parasitic on the body surface of gudgeons (Gobio gobio L.). At a water temperature of 12-degrees-C, the number of gyrodactylids gradually increased up to the mean value-of 63 specimens per host, which was reached on days 27-28 after experimental infection. At a constant temperature of 18-degrees-C, the parasites completely disappeared from the bodies of infected fishes on days 15-20 p.i. A similar effect was produced by gradually increasing temperature from 12 to 18-degrees-C, while the...

ON THE DISSEMINATION OF 2 FAR-EAST MONOGENEAN PARASITES (DACTYLOGYRUS-ACHMEROVI GUSSEV, 1955 AND GYRODACTYLUS-KHERULENSIS ERGENS, 1974, OF CARP (CYPRINUS-CARPIO L) IN CZECHOSLOVAKIA

M GELNAR, E LUX

Folia Parasitologica 38[2] 131-132 (1991)

EARLY DEVELOPMENT OF KHAWIA-SINENSIS HSU, 1935 (CESTODA, CARYOPHYLLIDEA), A CARP PARASITE

T SCHOLZ

Folia Parasitologica 38[2] 133-142 (1991)

The development of the tapeworm Khawia sinensis parasitizing carp (Cyprinus carpio L.) has been studied from the release of cestode eggs into water to the formation of infective procercoids in the intermediate host under laboratory conditions. The rate of embryonal development is greatly influenced by the water temperature. While at 5-degrees-C the development of oncospheres was not recorded, at 10-12-degrees-C, 15-degrees-C, 20-22-degrees-C, and 23-24-degrees-C oncospheres were fully formed after 57, 42, 21 and 16 days, respectively. Infectivity of oncospheres was confirmed by successful experimental infection of the intermediate hosts: Tubifex tubifex...

THE LIFE-CYCLE OF ECHINOSTOMA-BOLSCHEWENSE (KOTOVA, 1939) (TREMATODA, ECHINOSTOMATIDAE)

V NASINCOVA

Folia Parasitologica 38[2] 143-154 (1991)

The life cycle of E. bolschewense, the species with 37 collar spines and closely related to E. revolutum, was experimentally studied. The following developmental stages are described: mother and daughter rediae, cercaria, metacercaria, and adult. The freshwater prosobranchiate snail Viviparus contectus was found to be the first intermediate host in nature. Under experimental conditions, the miracidia developed in V. contectus. They did not, however, penetrate into Bithynia tentaculata or into any of the pulmonate snails tested. The cercariae encysted in various Prosobranchia and Pulmonata. Adult worms were commonly obtained from hamsters (Mesocricetus...

SYSTEMATIC STATUS OF THOMINX-PLATYRRHINORUM BARUS, 1961 (NEMATODA, CAPILLARIIDAE)

F MORAVEC, V BARUS

Folia Parasitologica 38[2] 155-162 (1991)

A reexamination of the type specimens of Thominx platyrrhinorum Barus, 1961, described from the small intestine of the monkey Cebus capucinus from a zoo in Czechoslovakia, has revealed that it belongs to the genus Aonchotheca Lopez-Neyra, 1947. The minute refractile formations on the surface of the proximal part of the spicular sheath, originally described as spines in this species, are also present in Aonchotheca annulosa parasitizing murid rodents. Since there are no substantial morphological or biometrical differences between these two species, as indicated by the description of A. annulosa specimens originating from Apodemus sp. from Czechoslovakia,...

OBSERVATIONS ON SOME NEMATODES PARASITIC IN FRESH-WATER FISHES IN LAOS

F MORAVEC, T SCHOLZ

Folia Parasitologica 38[2] 163-178 (1991)

In 1989, samples of some freshwater fishes collected in Vientiane Province (R. Mekong basin) in Laos were examined for helminths. This material comprised 11 species of parasitic nematodes (7 adults and 4 larvae), including 3 species new to science: Canallanus (Camallanus) hampalae sp. n. from Hampala macrolepidota, Procamallanus (Punctocamallanus) punctatus sp. n. from Mystus rhegma and Mystus sp., and Rhabdochona (Globochona) equispiculata sp. n. from Hampala macrolepidota and H. dispar. Zeylanema Yeh, 1960 is considered a subgenus of the genus Camallanus, Dentocamallanus subgen. n. (type species C. (D.) sweeti (Moorthy, 1937)) is proposed for the...

ULTRASTRUCTURE OF THE DIGESTIVE-TRACT OF ECHINOSTOMA-REVOLUTUM CERCARIA

Z ZDARSKA

Folia Parasitologica 38[2] 179-181 (1991)

The digestive tract of a fully formed free-swimming cercaria of Echinostoma revolutum (Froelich, 1802) Dietz, 1909 was studied by electron microscopy. The oral sucker and pharynx are covered by a tegument. The oesophagus and the caeca are not luminized. They are packed with giant epithelial cells with electron-dense granules of irregular shape, rough endoplasmic reticulum and its cisterns, and Golgi apparatus. The tegument of the oral sucker cavity contains numerous uniciliate receptors.

DESCRIPTION OF SPINICAUDA-DUGESII SP-N (NEMATODA, HETERAKIDAE) OF PODARCIS-DUGESII (REPTILIA, LACERTIDAE) FROM MADEIRA ISLAND

N SANCHES-GUMIEL, LMZ RAMOS, CC FERNANDEZ, PMG SANTIAGO

Folia Parasitologica 38[2] 183-186 (1991)

Spinicauda dugesii sp. n. (Heterakoidea, Heterakidae), parasite of the gut of the lizard Podarcis dugesii Milne-Edwards, 1829 (Reptilia, Lacertidae) from Madeira Island is described. Males of the new species are characterized by their narrow lateral alae, and curved and very chitinized spicules of the same length: females by their thick-shelled, almost round and embryonated eggs. At the external wall of the host's gut, parasitic cysts of this nematode with immature stages inside were also observed.

INVIVO RESPONSE OF MULTIRESISTANT PLASMODIUM-FALCIPARUM INFECTIONS TO MEFLOQUINE AND ITS COMBINATION WITH SULFADOXINE PYRIMETHAMINE IN CAMBODIA

MB DENIS, RL KOUZNETSOV, M GIBODA

Folia Parasitologica 38[2] 187-188 (1991)

FINDING OF THE COCCIDIUM EIMERIA-FERRISI LEVINE ET IVENS, 1965 (EIMERIIDAE, APICOMPLEXA) IN FERAL HOUSE MICE (MUS-MUSCULUS) IN SOUTH BOHEMIA

B KOUDELA, Z CERNA

Folia Parasitologica 38[2] 189-190 (1991)