development of leucocytozoon caulleryi in chick embryos infected by biting of culicoides arakawae through shell membrane.chick embryos were infected with leucocytozoon caulleryi by biting of the midge, culicoides arakawae, through the shell membrane. schizonts of l. caulleryi were detected in the chorioallantoic membrane and most of the internal organs of embryos and of chicks after hatching. the development of schizonts was slower in embryos than in chickens. soluble antigens of l. caulleryi were demonstrated by the precipitation test in the allantoic fluid and blood from the embryos and chicks. no erythrocytic s ...197899671
culicoides arakawae (diptera: ceratopogonidae) efficiently blood-fed and infected with leucocytozoon caulleryi through a natural membrane.culicoides arakawae, the most common culicoides sp. on chicken farms in east asia, is an important blood-sucking insect and leucocytozoon caulleryi vector. how parasites, in an ingested blood bolus, enter the midgut of insects and deal with this complex and biochemically hostile environment is poorly understood. however, successful blood-feeding through a membrane in c. arakawae is beneficial for studying this phenomenon. therefore, a membrane-feeding method for c. arakawae was developed in. the ...200111511416
abundance and prevalence of culicoides (diptera: ceratopogonidae) on some philippine chicken total, 10,067 biting midges of the genus culicoides comprising 17 species were collected in a light trap survey of 50 chicken farms in the province of batangas, southern luzon, philippines, between 14 september and 5 december 1988. the species of greatest prevalence and abundance were culicoides effusus delfinado, culicoides peregrinus kieffer, and culicoides palpifer sen & das gupta. engorged females of c. effusus, c. peregrinus, c. palpifer, culicoides oxystoma kieffer, culicoides arakawae ...19948158628
role of chicken serum in inhibiting leucocytozoon caulleryi development in culicoides arakawae infected by membrane-feeding of infective blood meals.leucocytozoon caulleryi, the most important pathogen of leucocytozoonsis in several asian countries, is transmitted by culicoides arakawae. although the vector blood meal factors that influence the infectivity of l. caulleryi remain poorly understood, the factors in infected chicken serum remain vital. c. arakawae blood-fed through a membrane were used in this experiment to examine the influence of serum factors on l. caulleryi development. experimental results indicate that c. arakawae were suc ...200111570552
cryopreservation of leucocytozoon caulleryi sporozoites.leucocytozoon caulleryi sporozoites that had been stored at -196 degrees c or -80 degrees c for 6 or 12 months in eagle's minimum essential medium or medium 199 supplemented with 5% glycerol and 10% chicken serum showed infectivity to chickens. glycerol at a concentration of 10% and dimethyl sulfoxide at 10% and 5% were found to be ineffective cryoprotective agents for the low temperature preservation of sporozoites. sporozoites isolated from the intact females of culicoides arakawae, which had ...19883183995
culicoides arakawae (diptera: ceratopogonidae) population succession in relation to leucocytozoonosis prevalence on a chicken farm in taiwan.leucocytozoonosis caused by leucocytozoon caulleryi is a significant disease prevalent in open chicken houses of southern and eastern asia. l. caulleryi is transmitted by culicoides arakawae, a blood-sucking vector. leucocytozoonosis prevalence is influenced by vector population succession. thus this examination was performed on a farm to investigate vector population succession and leucocytozoonosis prevalence in experimental chicks and to obtain the ecology data for assessing the prevalence. t ...200011035229
fine structure of leucocytozoon caulleryi during microgametogenesis and fertilization.the fine structure of microgametogenesis and fertilization in leucocytozoon caulleryi was studied. when the peripheral blood of chickens containing mature gametocytes was withdrawn or ingested by culicoides arakawae , differentiation of the microgametocytes began immediately. the cytoplasm of host cell and the outer membrane of the microgametocyte disappeared. axoneme formation began in the cytoplasm and the condensed chromatin masses were observed at the periphery of the nucleus of microgametoc ...19846428080
observations on the taiwanese strain of leucocytozoon caulleryi (haemosporina) in chickens.the taiwanese strain of leucocytozoon caulleryi was isolated from an infected chicken in taipei, taiwan, and established in chickens and biting midges culicoides arakawae from japan. sporogony of the strain in c. arakawae was completed on day 3 after the infective blood meals at 25 degrees c. sporozoites isolated from the salivary glands of c. arakawae on days 3 or 4 after feeding caused infection in all the chickens inoculated. the strain showed high pathogenicity for chickens. mortality of chi ...19863090239
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