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Studies on the epidemiology of schistosomiasis in Liberia: The prevalence and intensity of schistosomal infections in Bong County and the bionomics of the snail intermediate hosts 1983 Bur. Biol. Res., Rutgers Univ., Nelson Biol. Lab., Piscataway, NJ 08854
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Acta Tropica
Periodical, Abbrev.
Acta Trop.
Pub Date Free Form
1983/
Volume
40
Issue
3
Start Page
205
Other Pages
229
Notes
Place of Publication
ISSN/ISBN
0001-706X
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Urine samples from 3548 individuals residing in six of the eight districts which comprise Bong County, Liberia, the project area of the Bong County Agricultural Development Project (BCADP), and fecal specimens from 3408 of these individuals were examined for schistosome ova. A total of 164 water sites, including rice paddies, were surveyed for schistosome vector snails and monthly changes in snail population density and infection rate were determined in selected water sites. Bulinus globosus were more widely distributed than Biomphalaria pfeifferi but the latter species showed a higher infection prevalence (12.3%) than the former one (10.3%). Snail population density and infection rate fluctuated with season, being higher in the dry season and lower during periods of heavy rainfall. Dessication and/or heat stress may have contributed to the contraction of snail population size at the end of the dry season. More water sites contained infected snails during December through February than at any other time of the year. In selected water sites examined at monthly intervals, mean snail density was higher in rice paddies than in other water contact sites but the latter showed a higher prevalence of infected snails than the former. The overall prevalence of Schistosoma mansoni (24.8%) was significantly higher than that of S. haematobium (22.7%) but the difference in prevalence rates of the two species in school children was not statistically significant. The intensity of S. haematobium infection (13.2 x̄G) was significantly higher than that of S. mansoni (6.3 x̄G). Mixed infections in school children did not have a significant effect on egg output. The prevalence and intensity of S. haematobium showed a dramatic decline between the age groups 0-15 and 20-50+ years old; the differences between these age groups in S. mansoni infection were unremarkable. In Zota, Jorquelle and Kokoya Districts, prevalence rates of S. haematobium were higher than those of S. mansoni; the reverse was observed in Suakoko and Panta-Kpai Districts but relative prevalence rates varied according to specific locality in each district. A south to north stratification of schistosomal infection prevalence was observed similar to the west to east gradient reported by Saladin et al. (1980). New rice paddies developed during the three year operational period of the BCADP contained little or no vector snails and schistosomal infections in farm families of these paddies reflected the characteristic of the disease in corresponding localities. Older paddies, pre-dating the operations of the BCADP, contained infected vector snails and farm families of some of these paddies showed higher prevalence rates of schistosomiasis than corresponding school children. The implications of these findings are discussed.
Descriptors
Biomphalaria, Bulinus, digestive system, epidemiology, geographic distribution, human, invertebrate, Liberia, Schistosoma haematobium, Schistosoma mansoni, schistosomiasis, trematode, urinary tract
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Dennis,E., Vorkpor,P., Holzer,B.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Ozone flux to Picea sitchensis (Bong) carr and Picea abies (L) karst during short episodes and the effects of these on transpiration and photosynthesis 1989 Forestry Commision, Forest Research Station, Farnham, GU10 4LH
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Environmental Pollution
Periodical, Abbrev.
Environ.Pollut.
Pub Date Free Form
1989/
Volume
59
Issue
2
Start Page
161
Other Pages
176
Notes
Place of Publication
ISSN/ISBN
0269-7491
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Sitka spruce and Norway spruce were grown in controlled environments and then exposed to ozone (O3) for short periods as in mid-afternoon episodes experienced in the forest. For concentrations of between 20 and 300 nl litre-1 there were linear relationships between exposure concentration and O3 uptake rates. Increasing photon flux densities increased rates of photosynthesis and transpiration, the increases being larger in actively growing than dormant seedlings. Physiological condition (dormancy or active growth), species and photo flux density were found in influence O3 flux via their effects on stomatal conductance. Exposure to 80 nl litre-1 O3 resulted in consistent increases of stomatal conductance and there were also indications that water-use efficiency was decreased.
Descriptors
ozone, nonhuman, photosynthesis, plant, sweating
Links
Book Title
Database
Embase
Publisher
Data Source
Embase
Authors
Freer-Smith,P. H., Dobson,M. C.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
The prevalence of onchocerciasis and blindness in the population of the Bong Range, Liberia 1973 Bernhard Nocht Inst. Schiffs- Tropenkrankh., Hamburg
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Periodical, Abbrev.
Z.TROPENMED.PARASIT.
Pub Date Free Form
1973/
Volume
24
Issue
3
Start Page
339
Other Pages
357
Notes
Place of Publication
ISSN/ISBN
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Among a sample of 1,252 persons from a total population of about 15,000 people of the Kpelleh tribe in the Bong Range area, 783 (63.2%) were carriers of microfilariae of O. volvulus. The infection was determined by a standardized skin biopsy technique (Walser punch). At the age of 16 to 18 yr more than 50% of the population had detectable larvae in the gluteal skin. Among the adult population the male sex showed a significant preponderance of positivity for microfilariae. The number of noninfected 'susceptibles' decreased annually by a factor of 0.92 to 0.925. About one half of a sample of adult subjects revealed microfilariae in the cephalic region. Findings of diminished vision (≤ 6/60) were compared with the microfilarial density in the anterior segment and in the environment of the eyes. The rate of blindness of 1.18% found in the Bong Range was more than twice as high as in onchocerciasis free regions of Liberia. Blindness appeared to be related to onchocerciasis in the majority of cases. The average age of the completely blind was 54 yr, and the onset of blindness could be dated back to an average of 48 yr. In the unilaterally blind the average age was 40 yr. In this group blindness appeared to be less related to onchocerciasis. Among 1,131 subjects a bilaterally impaired vision was found in 8.3%. Together with the unilaterally blind, the total number of persons with visual damage besides the blind was 9.8% of the population sample at Bong Range.
Descriptors
age, blindness, cornea, diagnosis, epidemiology, filariasis, Onchocerca volvulus, onchocerciasis, sex
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Frentzel Beyme,R.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Quantitative studies on the transmission of Onchocerca volvulus by Simulium damnosum in the Bong Range, Liberia 1973 Bernhard Nocht Inst. Schiffs- Tropenkrankh., Hamburg
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Periodical, Abbrev.
Z.TROPENMED.PARASIT.
Pub Date Free Form
1973/
Volume
24
Issue
3
Start Page
358
Other Pages
372
Notes
Place of Publication
ISSN/ISBN
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Quantitative aspects of the transmission of O. volvulus have been investigated in an area of the tropical rain forest zone in West Liberia. The daily and annual cycles of biting densities, age composition and infection rates of the Simulium damnosum population have been studied for one or more years at 7 catching sites. Dissections of 67,758 females of S. damnosum revealed a mean annual parous rate of 10.9%; 17.2% of the parous flies carried developing filaria infections, 2.6% third stage larvae of O. volvulus, and 3.0% third stage larvae of other filaria species. An average of 900 O. volvulus larvae theoretically transmitted per man per year was calculated. This transmission potential was associated with a microfilariae carrier rate of 63% in the human population.
Descriptors
arthropod, carrier, epidemiology, Microfilaria, Onchocerca volvulus, onchocerciasis, prevention, Simulium damnosum
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Garms,R.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
An endemic disease survey of Bong County, Liberia 1982 Howard Univ. Coll. Med., Washington, DC 20060
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of the National Medical Association
Periodical, Abbrev.
J.Natl.Med.Assoc.
Pub Date Free Form
1982/
Volume
74
Issue
11
Start Page
1093
Other Pages
1102
Notes
Place of Publication
ISSN/ISBN
0027-9684
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Descriptors
epidemiology, geographic distribution, helminthiasis, human, Liberia, malaria, nematode, protozoal infection, protozoon, trematode
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Grigsby,M. E.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
[Between science and ideology: the rise and fall of Bong-han theory in 1960's North Korea]. 1999 Kim, G.B.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Han'guk Kwahaksa Hakhoeji
Periodical, Abbrev.
Hanguk Kwahaksa Hakhoeji
Pub Date Free Form
/
Volume
21
Issue
2
Start Page
194
Other Pages
220
Notes
Place of Publication
ISSN/ISBN
1229-7895
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Descriptors
article, education, ethnology, history, history of medicine, ideology, North Korea, personnel, politics, procedures, science
Links
Book Title
Database
MEDLINE
Publisher
Data Source
Embase
Authors
Kim,G. B.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Documentation of Tibetan medicinal plants (6th comm.): Bong-dkar Aconitum heterophyllum WALL. ex ROYLE 1997 Kletter, C., Institute of Pharmacognosy, University of Vienna, Centre or Pharmacy, A-1090 Vienna, Austria
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Scientia Pharmaceutica
Periodical, Abbrev.
Sci.Pharm.
Pub Date Free Form
1997/12
Volume
65
Issue
4
Start Page
299
Other Pages
314
Notes
Place of Publication
ISSN/ISBN
0036-8709
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Aconitum heterophyllum is the source of the Tibetan medicinal drug bong- dkar. All parts of the plant may be used for the treatment of the diseases rim-tshad, mkhris-tshad, and tsha-ba of the small intestine. Bong-dkar is also valued as a useful remedy against snake and scorpion poison. Aconitum heterophyllum grows in the northwestern Himalayas at altitudes of 2000 to 4500 m. Morphological details of the plant and anatomical characteristics of the above-ground parts are given. The main anatomical characteristics are three types of unicellular hairs, unequally sized epidermis cells of the leaf and a sclerenchyma belt in the stem.
Descriptors
Aconitum extract, scorpion venom, snake venom, article, constipation, diarrhea, epidermis cell, intoxication, medicinal plant, nonhuman, plant growth, plant leaf, small intestine disease, snakebite, traditional medicine
Links
Book Title
Dokumentation tibetischer heilpflanzen (6. Mitt.): Bong-dkar, Aconitum heterophyllum WALL. ex ROYLE
Database
Embase
Publisher
Data Source
Embase
Authors
Kletter,Ch, Kriechbaum,M., Krasser,R., Waclavicek,M., Dawa,D., Dekhang,D., Holzner,W., Kubelka,W.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
A biomonitor of trace heavy metals: Indium and dysprosium in red alder roots (Alnus rubra Bong.) 1981 Nucl. Sci. Cent., Louisiana State Univ., Baton Rouge, LA 70803
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Environmental and experimental botany
Periodical, Abbrev.
Environ.Exp.Bot.
Pub Date Free Form
1981/
Volume
21
Issue
2
Start Page
217
Other Pages
223
Notes
Place of Publication
ISSN/ISBN
0098-8472
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Bioaccumulation of indium (In) and dysprosium (Dy) by the roots of red alder (Alnus rubra Bong.) was tested in a small free-flowing stream in Oregon. Mixed solutions of the two elements, In and Dy, were continuously introduced into the stream water as non-radioactive tracers for 1.8 hr and 2.1 hr in two separate experiments. In the first experiment, the two elements were added in a non-chelated form; in the second expreiment, upstream from the first, indium-DTPA [(carboxymethylimino)bis(ethylene-dinitrilo) tetraacetic acid pentasodium salt] and dysprosium-DTPA were used as tracers. Instrumental neutron activation analysis was used to determine the quantity of each stable tracer sorbed to the alder roots and the amount remaining in the stream water. Non-chelated In was sorbed by roots up to a concentration of 1.7 μg In/g of root (dry wt), whereas the In-DTPA sorption rate was higher by a factor of approximately 2. Non-chelated Dy was sorbed by roots up to a concentration of 29 μg Dy/g of root (dry wt), while the sorption of Dy-DTPA was less by a factor of 8.
Descriptors
dysprosium, indium, animal experiment, vascular plant, tree
Links
Book Title
Database
Embase
Publisher
Data Source
Embase
Authors
Knaus,R. M., El-Fawaris,A. H.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Intraspecific variation of DNA per cell between Picea sitchensis (Bong.) Carr. provenances. 1971 Miksche, J.P.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Chromosoma
Periodical, Abbrev.
Chromosoma
Pub Date Free Form
/
Volume
32
Issue
4
Start Page
343
Other Pages
352
Notes
Place of Publication
ISSN/ISBN
0009-5915
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Descriptors
DNA, analysis of variance, article, cell nucleus, cytology, densitometry, environment, metabolism, plant seed, spectrophotometry, tree, United States
Links
Book Title
Database
MEDLINE
Publisher
Data Source
Embase
Authors
Miksche,J. P.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Pharmacognostical studies on the folk medicine 'Bong Seon Wha Dae' 2003 Park, J.H., College of Pharmacy, Pusan National University, Pusan 609-735, South Korea
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Korean Journal of Pharmacognosy
Periodical, Abbrev.
Korean J.Pharmacogn.
Pub Date Free Form
2003/09
Volume
34
Issue
3
Start Page
193
Other Pages
196
Notes
Place of Publication
ISSN/ISBN
0253-3073
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Korean folk medicine 'Bong Seon Wha Dae' has been used to cure constipation and acute gastritis by meat. The botanical origin of the crude drug has not been studied pharmacogostically. To clarify the botanical origin of 'Bong Seon Wha Dae', the morphological and anatomical characteristics of Impatiens species growing in Korea, i.e. I. balsamina L., I. noli-tangere L., I. textori Miq. and I. textori Miq. for. pallenscens Hara were studied. As a result, 'Bong Seon Wha Dae' was proved to be the stem of I. balsamina L.
Descriptors
bong seon wha dae, Impatiens balsamina extract, plant extract, unclassified drug, article, Balsaminaceae, constipation, gastritis, herbal medicine, Impatiens, impatiens noli tangere, Impatiens textori, medicinal plant, pharmacognosy, plant stem, traditional medicine
Links
Book Title
Database
Embase
Publisher
Data Source
Embase
Authors
Park,J. H., Kim,J. M., Do,W. I.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors