Schistosoma monsoni (Puerto Rican strain) cercariae were exposed to 10, 20, 50, 100, 200, 300, 400 and 500 krad gamma radiation from “Co gamma source. From 10-100 krad irradiation no differences could be found in the behaviour of the cercariae when compared to the controls. From 200-500 krad there was an increase in mortality as well as in the number of cercariae that shed their tails. The Con A binding studies also performed on cercariae radiated with up to 100 krad indicate a direct relationship between the number of cercariae that bind Con A and radiation dose. All live cercarial heads collected after radiation also bound Con A. It thus seems possible that irradiation may act as a stimulus for cercariae to transform to schistosomulae.
Sciadicleithrum meekii sp. n. is described from the gills of the cichlid fish Cichlasoma meeki (Brind) from cenotes (= sinkholes) of the Yucatan Peninsula, Mcxico.The new species differs from congeners by having a dorsal hamuli with a prominent superficial root articulated with a straight shaft and curved point, and a vagina with a coiled tube comprised of one ring.
The morphology of the scoleces of 11 Proteocephalus species, parasites of freshwater fish in the Palaearctic Region, was compared using light and scanning electron microscopy. The following taxa were evaluated: Proteocephalus ambiguus (Dujardin, 1845); P. cernuae (Gmelin, 1790); P. exiguus La Rue, 1911; P. filicollis (Rudolphi, 1802); P. macrocephalus (Creplin, 1825); P. osculatus (Goeze, 1782); P. percae (Müller, 1780); P. pollunicola Gresson, 1952; P. sagitlus (Grimm, 1872); P. thymalli (Annenkova-Chlopina, 1923); and P. torulosus (Batsch, 1786). Some features as overall shape of the scolex, its size, shape and size of an apical sucker were found to be fairly stable and species-specific. The taxa more easily distinguishable from congeners on the basis of their scolex morphology were P. cernuae, P. macrocephalus, P. osculatus, P. percae and P. torulosus. The taxonomic importance of the scolex is discussed.
This paper summarizes the discussion of ethnology in Slovenia between ‘narodopisje’ and anthropology from the point of view of its theoretical and methodological issues. At the same time it delineates some characteristics of ethnology and folklore studies in Slovenia in the 20th century, whereby the discussion on the wider social implications is omitted. Considerations put forward here are limited to those disciplinary issues which are the fruit of self-reflexive and critical insights in ethnology, which enable to highlight the origins, the formation and changes of research patterns from predominant philological and cultural-historical roots of ‘narodopisje’ to anthropologically oriented contemporary research. Some general observations, a retrospective view of the status of theory and methodology, the tradition of ‘narodopisje’, the ‘farewell to folk life’, the new methodological horizons, the predicament of the ‘two-headed ethnology’ and recent anthropologization are considered. and Článek shrnuje debaty o etnologii ve Slovinsku, její vývoj od „národopisu“ {narodopisje) k antropologii, se zvláštním zřetelem k teoretickým a metodologickým problémům. Nastiňuje některé charakteristiky etnologie a folkloristiky ve Slovinsku ve 20. století, vyhýbá se ale diskusi o širších sociálních souvislostech. Omezuje se pouze na ty problémy disciplíny, které jsou produktem sebereflexe a kritického přístupu k etnologii, což umožňuje zdůraznit její počátky, formování a změny stylu výzkum, od převážně filologických a kulturně-historických kořenů „národopisu“ k antropologický orientovanému výzkumu v současnosti. Připojeny jsouněkteré obecné postřehy, a také retrospektivní pohled na status teorie a metodologie, úvahy o tradici „národopisu“, „rozloučení s lidovým životem“, o nových metodologických horizontech, dilematu „dvouhlavé etnologie" a aktuální antropologizaci.
Relatively few effective compounds are available for treating microsporidiosis in humans. In this study, several compounds were assayed for activity against Encephalitozoon intestinalis (Cali, Kotier et Orenstein, 1993) and Vittaforina corneae Shadduck, Meccoli, Davis ct Font, 1990 in vitro. Of the benzimidazoles tested, albendazole was most effective and the MIC50 values were 8.0 ng/ml and 55.0 ng/ml for E. intestinalis and V. corneae, respectively. Fumagillin and its analogue, TNP-470 were nearly equally effective against both E. intestinalis and V. comeae. The MIC50 values of fumagillin were 0.52 ng/ml and 0.81 ng/ml, and the MIC5() values of TNP-470 were 0.35 ng/ml and 0.38 ng/ml for E. intestinalis and V. comeae, respectively. In addition, 12 of 44 purines and pteridines with putative tubulin binding activity that were synthesized at Southern Research Institute (SRI), inhibited microsporidia) replication by more than 50% at concentrations that were not toxic to the host cells. Several chitin synthesis/assembly inhibitors inhibited growth of the microsporidia in vitro but were toxic for the host cells making it difficult to interpret the results. One exception was Iufcnuron, which caused no significant toxicity to the host cells and expressed approximate MICS0 values of 2.95 pg/ml and 6.3 pg/ml against E. intestinalis and V. comeae, respectively. These results warrant further studies on albendazole, fumagillin, TNP-470, lufenuron, and the selected SRI purines and pteridines for developing therapeutic strategies for microsporidiosis.