Tropenmedizin und Parasitologie最新文献_第8页

Chronic exposure of the eggs and adults of Biomphalaria glabrata (Say) to the molluscicide, nicotinanilide. 长时间暴露于杀软体剂烟酰胺的光藻卵和成虫。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

J Duncan, N Brown

引用次数: 0

Onchocerciasis in Ecuador. I. Prevalence and distribution in the province of Esmeraldas. 厄瓜多尔的盘尾丝虫病。1 .在埃斯梅拉达斯省的流行和分布。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

R H Guderian, J Molea, D Swanson, R Proaño, R Carrillo, W L Swanson

{"title":"Onchocerciasis in Ecuador. I. Prevalence and distribution in the province of Esmeraldas.","authors":"R H Guderian, J Molea, D Swanson, R Proaño, R Carrillo, W L Swanson","doi":"","DOIUrl":"","url":null,"abstract":"In the province of Esmeraldas in Ecuador, 11 endemic foci of onchocerciasis were identified. The major focus, located on Rio Cayapas, consisted of 65 contiguous positive communities with an average infection rate of 51.1%. A distance-dependent characteristic of the onchocerciasis infection suggested that the transmission was centered principally in the areas near the head-waters of the river. This area, inhabited primarily by the indigenous tribe, Chachi, with an infection rate of 85%, was considered an area of hyperendemicity. Towards the river's mouth, where the majority of the inhabitants were Blacks, the rate of infection was 7%. The endemic focus located on Rio Santiago, populated entirely by Blacks and consisting of 17 contiguous positive communities, had an average infection rate of 18.8%. Again, the highest rate of infection, 33%, occurred in the upper reaches of the river. Resulting from the transient and migratory activity of some microfilariae-positive persons, 9 other isolated foci were found dispersed throughout the province. The infection rate of each focus was distinct, reflecting geographical location and ethnic composition. All foci other than the interior regions of Rio Cayapas were areas of hypoendemicity.","PeriodicalId":76764,"journal":{"name":"Tropenmedizin und Parasitologie","volume":"34 3","pages":"143-8"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17692629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Onchocerciasis in Ecuador. II. Epidemiology of the endemic foci in the province of Esmeraldas. 厄瓜多尔的盘尾丝虫病。2埃斯梅拉达斯省地方性疫源地的流行病学。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

R H Guderian, D Swanson, R Carrillo, R Proaño, J Molea, W L Swanson

{"title":"Onchocerciasis in Ecuador. II. Epidemiology of the endemic foci in the province of Esmeraldas.","authors":"R H Guderian, D Swanson, R Carrillo, R Proaño, J Molea, W L Swanson","doi":"","DOIUrl":"","url":null,"abstract":"The epidemiology of infection was studied in all endemic foci of onchocerciasis in the province of Esmeraldas in Ecuador. The incidence of infection and the density of microfilariae in the skin, both greater in males than females, increased with age, reaching highest levels at 40-45 years in males and at 60 years and older in females. In the hyperendemic area males and females had the same rate of infection, but the microfilarial density in males exceeded that in females. In the hypoendemic areas males had a higher infection rate than females, but females registered a higher density of microfilariae in the skin. The incidence and location of the onchocercal nodules correlated closely with the density of microfilariae. Adults, aged 50-54 had the highest prevalence of onchocercal nodules, which occurred primarily in the thorax and pelvic regions. Children aged 0-14 years showed a low prevalence of nodules, the head region being the primary site. Of the two diagnostic methods used to detect the presence of microfilariae, most of the diagnoses (85.6%) were made by skin biopsies as compared to those made by the Mazzotti test (14.4%).","PeriodicalId":76764,"journal":{"name":"Tropenmedizin und Parasitologie","volume":"34 3","pages":"149-54"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17691415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isolation of human serum resistant Trypanozoon from cattle in Nigeria. 尼日利亚牛中人类血清耐药锥虫的分离。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

R A Joshua, Y Magaji, Y S Kayit

引用次数: 0

Immune complexes in experimental alveolar hydatidosis. 实验性肺泡包虫病的免疫复合物。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

Z Ali-Khan, R Siboo

引用次数: 0

Plasma lipid changes in human malaria. 人疟疾患者血浆脂质变化。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

I C Onongbu, E C Onyeneke

引用次数: 0

Lysosomal enzyme in Mastomys natalensis during Dipetalonema viteae infection. 双盘线虫感染期间纳塔利乳突虫的溶酶体酶。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

A K Srivastava, D P Singh, R K Chatterjee, S Ghatak

引用次数: 0

The use of 75-seleno-methionine labelled Trypanosoma brucei to measure parasite replication in vivo. 使用75-硒-蛋氨酸标记的布鲁氏锥虫来测量寄生虫在体内的复制。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

J A MacAskill, P H Holmes

{"title":"The use of 75-seleno-methionine labelled Trypanosoma brucei to measure parasite replication in vivo.","authors":"J A MacAskill, P H Holmes","doi":"","DOIUrl":"","url":null,"abstract":"The suitability of 75-Se-labelled trypanosomes for the measurement of trypanosome replication rates in vivo was investigated. The principle used to estimate the doubling time of the circulating parasites was the decrease in specific activity of 10(-7) parasites and this was determined both for parasites contained in a whole blood sample and for parasites separated from the blood sample by DEAE-cellulose chromatography. When two stocks of T. brucei (TrEU 226, TrEU 667) were compared it was found that the parasitemic profiles of radio-labelled trypanosomes transfered into naive mice were essentially the same as those of unlabelled parasites of each stock. Furthermore it was found that in an acute infection (TrEU 226) there was a rapid and continuous fall in the specific activity implying a constant doubling time. However, in the more chronic relapsing infection (TrEU 667) a biphasic decrease in the specific activity occurred which although initially similar to that of the acute infection changed to a much slower rate of replication at the time of peak parasitemia. The results indicate that radiolabelled trypanosomes can be used to measure parasite replication rates in vivo, and may therefore be a valuable method for investigating the factors governing parasite growth in the circulation.","PeriodicalId":76764,"journal":{"name":"Tropenmedizin und Parasitologie","volume":"34 3","pages":"197-200"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17691420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The fine structure of adult Onchocerca volvulus. V. The digestive tract and the reproductive system of the female worm. 成虫盘尾丝虫的精细结构。五、雌虫的消化道和生殖系统。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

M Franz, D W Büttner

引用次数: 0

Improvement of in vitro culture conditions of Brugia pahangi four day old developing larvae for use in an antifilarial drug assay. 4日龄pahangi幼虫体外培养条件的改进及抗丝虫药物试验研究。

Tropenmedizin und Parasitologie Pub Date : 1983-09-01

J P Court, G M Lees

{"title":"Improvement of in vitro culture conditions of Brugia pahangi four day old developing larvae for use in an antifilarial drug assay.","authors":"J P Court, G M Lees","doi":"","DOIUrl":"","url":null,"abstract":"Four day old third stage larvae of Brugia pahangi were cultured in the presence of differing concentrations of early passage dog kidney cells and inactivated foetal calf serum. After a six day culture period worm length, number of moults and worm mortality were determined. Analysis of the length data demonstrated a significant interactive relationship between cell and serum concentration. The greatest increases in length were obtained using an initial cell density of dog kidney cells of 40 x 10(4) plus a serum concentration of 10%. (The surface area of all culture vessels was 2.0 cm2). In addition moulting occurred earlier and was more prolific with higher cell and serum concentrations. The response of larvae to antiparasitic agents in the presence or absence of a confluent dog kidney feeder layer was then compared to determine whether the inclusion of cells altered drug effects. From this it was found that the killing effects of flubendazole, albendazole, furazolidone, levamisole and nifurtimox at their minimum effective concentrations were delayed under biphasic culture conditions. It is suggested that this is an advantage and will improve the selectivity of the assay over and above an assay which does not include a cell feeder layer. In addition the improved growth rates obtained in cultures containing dog kidney cells should mean an increase in test sensitivity to agents capable of disrupting biosynthesis.","PeriodicalId":76764,"journal":{"name":"Tropenmedizin und Parasitologie","volume":"34 3","pages":"162-8"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17691417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0