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Showing 1 to 20 of 22 for “"Cercariae"”.
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The penetration protease of the cercariae of Schistosoma mansoni
… with a study of the proteases released by the cercariae of Schistosoma mansoni while penetrating mammalian skin. The proteases present in secretions collected from the preacetabular glands of cercariae were shown to be active against ¹²⁵I-labelled fibrin but not against undenatured ³H-collagen. …
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Survey of marine cercariae from the coasts of Marin and Sonoma Counties, California
… aimed at: first, to continue a survey of the cercariae of the area begun by Fisk (194) and second, to establish a basis for future life history studies.
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Some Aspects of Carbohydrate Metabolism in the Cercariae of SCHISTOSOMA MANSONI Sambon, 1907
… of significant amounts of lactic acid by the cercariae was not observed.</p> <p>Respiration was measured on a Warburg constant volume respirometer. The amount of oxygen used by a single cercaria in 4 hours is determined as 29.0 x 10 <sup>-4</sup> μl ± 3.4 x 10<sup>-4</sup> μl. The amount of …
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Behavioral Analysis of a Digenetic Trematode Cercaria (Microphallus Turgidus) in Relation to The Microhabitat of Grass Shrimp (Palaemonetes Spp.)
… so, I established a behavioral ethogram for the cercariae of M. turgidus and compared the behavior of these parasites to the known host behavior. I tested the phototactic, geotactic, and chemical responses of the parasite. When M. turgidus cercariae are placed in a half covered Petri dish I …
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Studies on the life-cycle of the digenetic trematode Rhipidocotyle campanula (Dujardin, 1845) (Gasterostomata : bucephalidae) with particular reference to the larval stages
… 'hosts from the reproductive, system. Both cercariae and glochidia are released simultaneously in mussels where the reproductive system is partly invaded by sporocyst tubules. The development of the cercariae in the sporocyst tubules has been studied briefly fusing histological and …
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Ritmos biológicos na emergência de Cercárias de Shistosoma mansoni Sambon, 1907 (Platyhelminthes: Digenea) em infecções mono e plurimiracidianas de Biomphalaria glabrata (Say, 1818) (Mollusca: Gastropoda)
… the daily rhythm of emergence of S. mansoni cercariae in mono - and plurimiracidial infections of B. glabrata. For this purpose the emergence at daytime and nighttime and its peaks were compared through a chronobiological methodology. For the tests,19 and 37 specimens of B.glabrata (Belo …
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Studies on life-cycles of digenetic trematodes
… with larval trematodes. Thirty species of cercariae have been found. Of these two are described as 'Monostome', three 'Gymnocephalous', one 'Pleurolophocercous', eleven 'Furcocercous', one 'Microcercous', one 'Cystocercous', five 'Echinostome', and six Xiphidiocercaria'. These specimens …
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Studies on Bucephalid cercaria including a new species from the Dillon Beach area
… gut of marine and fresh-water fishes. The metacercariae are found encysted beneath the skin or in the nervous system of other fishes serving as second intermediate hosts. Sporocysts and cercariae have been recovered from a variety of lamellibranchs.</p><p>A generalized life cycle of the …
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Marine Cercariae from Cerithidea Pliculosa Menke from Dauphin Isalnd, Alabama; Life Cycles of Heterophyid and Opisthorchiid Digenea from Cerithidea Swainson from the Eastern Gulf of Mexico
Horn snails of the genus Cerithidea Swainson (1840) are represented in North America by four species. They are: Cerithidea costata (da Costa, 1778), found in South Florida and in the West Indies; Cerithidea californica (Haldeman, 1840), from Bolinas Bay, California to the Gulf of California; …
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The Distribution and Biology of the Invasive Eyefluke of Waterfowl (Philophthalmus gralli) in Texas
… shedding either of two invasive heterophyid cercariae, and those not shedding any cercariae. Each of the three groups was further subdivided into treatment and control subgroups, and snails in each treatment subgroup were exposed to 5-10 P. gralli miracidia. After incubating for 120 d, the …
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Studies on the biology of Plagiorchis elegans (Rudolphi, 1802), (Trematoda: Digenea) in its mammalian and molluscan hosts
… which develop several hundred thousand xiphidiocercariae. Upon release cercariae are negatively phototropic and negatively geotropic, with-light-and temperature affecting the rate of cercarial emmission. Cercariae encyst-in aquatic arthropods (Chironomus sp.,Asellus aquaticus and Gammarus pulex) …
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Quantifying Metagonimoides oregonensis infection distribution and effects among stream salamander hosts
… factors. My final study examined the effect of cercariae exposure (n=0, 20, 60) on locomotor performance of D. quadramaculatus, Eurycea wilderae and Hyla versicolor. I did not see any effect on locomotor performance for any of the species.
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Population Biology of Daubaylia potomaca (Nematoda:Rhabditida) in Mallard Lake, North Carolina
… including both Echinostoma sp. miracidia and cercariae, and thus aids in preventing trematode infection in the snail host. Therefore, the protective actions of C. l. limnaei against Echinostoma sp. indirectly increases the mean intensity of D. potomaca by allowing the nematode more space to …
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Concurrent Infection of TRYPANOSOMA MUSCULI Kendell, 1906, and SCHISTOSOMA MANSONI Sambon, 1907 in Mice
… on the penetration of <em>S. mansoni</em> cercariae.</p>
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