Abstract:
:A cohort of 250 Ghanaian schoolchildren aged 5-15 years was followed clinically and parasitologically for 4 months in 1997/98 in order to study the effect of asymptomatic Plasmodium falciparum infections on haematological indices and bone-marrow responses. Of the 250 children 65 met the predefined study criteria. Thus, 14 children were parasite-free throughout (group 1), 44 had P. falciparum in all blood samples collected but no symptoms of malaria (group 2), and 7 had 1 malaria attack during the study period (group 3). At the end of the study the mean haemoglobin (Hb) level in group 1 was 123 g/L, significantly higher than the value of 114 g/L in groups 2 and 3 (P < 0.02, adjusted for age and splenomegaly). The low Hb in group 2 was associated with subnormal plasma iron. Low Hb was associated with elevated erythropoietin (EPO) levels, and there was a positive correlation between EPO and reticulocyte counts. However, the reticulocyte response to EPO was more pronounced in uninfected than in infected children, suggesting a partial interference with erythropoiesis in asymptomatic infections. Children with asymptomatic infections had significantly higher plasma levels of tumour necrosis factor than uninfected children (geometric means 50 ng/L and 27 ng/L, respectively, P < 0.001) and this cytokine may contribute to bone-marrow suppression and disturbed iron metabolism. We suggest that asymptomatic malaria leads to a homeostatic imbalance in which erythrocyte loss due to parasite replication is only partially compensated for by increased erythropoiesis. The consequences of the reduced Hb levels on the development and cognitive abilities of children with asymptomatic infections, and the risk of precipitation of iron deficiency, deserve further study and should be considered in malaria control programmes that aim at reducing morbidity rather than transmission.
journal_name
Trans R Soc Trop Med Hygauthors
Kurtzhals JA,Addae MM,Akanmori BD,Dunyo S,Koram KA,Appawu MA,Nkrumah FK,Hviid Ldoi
10.1016/s0035-9203(99)90073-1subject
Has Abstractpub_date
1999-11-01 00:00:00pages
623-7issue
6eissn
0035-9203issn
1878-3503journal_volume
93pub_type
杂志文章abstract::The avidin-biotin immunohistochemical (ABC) method was applied to the diagnosis of alveolar hydatid disease in patients from the hyperendemic region of western Alaska. The test was specific for larval cestodes of the genus Echinococcus, and exhibited high sensitivity. A negative reaction was obtained in all cases in w...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(88)90219-2
更新日期:1988-01-01 00:00:00
abstract::The emerging virus strain termed highly pathogenic H5N1 avian influenza (HP-H5N1) has spread widely in the past decade and is now the focus of considerable concern in several sectors. We tested the hypothesis that spatial distributions of veterinary and human HP-H5N1 cases are related to coarse-scale environmental fea...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2008.01.016
更新日期:2008-05-01 00:00:00
abstract::A study was conducted in 1997 to compare the accuracy of presumptive diagnosis of malaria in children aged 1-9 years performed by caretakers of the children to that of health centre staff in 2 ecological zones in southern Ghana. Similar symptoms were reported in the children at home and at the health centre. In the ho...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/s0035-9203(00)90324-9
更新日期:2000-05-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2008.04.025
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abstract::An evaluation of the performance of the Kersey Nutrition Rehabilitation Centre in Nigeria was undertaken with particular focus on mortality, rate of weight gain, and the management strategy. During 1987-1991 the total number of admissions for protein-energy malnutrition (PEM) was 803. The age group most commonly repre...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(94)90177-5
更新日期:1994-09-01 00:00:00
abstract::During February and March of 1998, 12 sudden deaths were reported among residents of a high-Andean community in Ecuador. All 12 fatalities were members of the same extended family and some had apparent exposure to sick guinea-pigs. Following an initial investigation by public health officials, an additional death was ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/s0035-9203(00)90114-7
更新日期:2000-07-01 00:00:00
abstract::Trypanosoma cruzi (Brazil strain) was maintained in liver infusion tryptose and medium supplemented with 5 or 10% foetal calf serum at 27 degrees C on a rotating shaker platform. 85 to 95% of the organisms under these conditions are epimastigotes and the medium supported logarithmic growth for up to 24 hours. The effe...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(82)90169-9
更新日期:1982-01-01 00:00:00
abstract::The purpose of this study was to determine the prevalence of cholera in two groups: (i) people using covered latrine and piped water; (ii) people using uncovered surface latrine and pond and tubewell water. The study population consisted of cholera cases admitted to the ICDDR, B hospital from three refugee camps. In t...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(82)90194-8
更新日期:1982-01-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2000-07-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,评审
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/tru077
更新日期:2014-07-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
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更新日期:1988-01-01 00:00:00
abstract::Following the successful eradication of Brucella abortus infection in cattle, human brucellosis in England and Wales has become an uncommon imported disease. Culture of the organism presents a major laboratory hazard, and difficulties in identification may occur using a biochemical test-strip method. An overview of re...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,评审
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更新日期:1993-03-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(86)90268-3
更新日期:1986-01-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(92)90305-v
更新日期:1992-05-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.trstmh.2006.04.006
更新日期:2006-12-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
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更新日期:1979-01-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 临床试验,杂志文章,多中心研究
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更新日期:2007-12-01 00:00:00
abstract::The COVID-19 pandemic has exposed health system weaknesses of economically wealthy countries with advanced technologies. COVID-19 is now moving fast across Africa where small outbreaks have been reported so far. There is a concern that with the winter transmission will grow rapidly. Despite efforts of African Governme...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/traa073
更新日期:2020-10-05 00:00:00
abstract::This paper reports the morphological and biochemical characterization of the species of Schistosoma infecting humans in the Republic of São Tomé and Principe. The eggs are typical in shape and size of S. intercalatum, measuring on average between 174.5 microns and 189.1 microns. The eggs are voided in the faeces and n...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(94)90441-3
更新日期:1994-07-01 00:00:00
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journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,多中心研究
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更新日期:2001-09-01 00:00:00
abstract::An outbreak of typhoid due to multi-drug resistant Salmonella typhi is reported from Pondicherry, India. While the average prevalence of drug resistant strains in 1980-1988 had been 11.7%, it increased to 52% in 1989-1990. The majority of strains (80.8%) were resistant to chloramphenicol, streptomycin, tetracycline an...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(92)90573-u
更新日期:1992-03-01 00:00:00
abstract::A serological study was undertaken to determine the role of arboviruses as etiological agents of encephalitis in the People's Republic of China (PRC). Paired sera were collected during mosquito seasons in 1988-1990 from 614 patients with possible viral encephalitis in 15 regions of PRC and tested for haemagglutination...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(92)90569-x
更新日期:1992-03-01 00:00:00
abstract::The spread of chloroquine-resistant malaria has led to a resurgence of quinine in clinical use. One of the well-known side effects of quinine, reversible hearing loss, is closely related to the plasma concentration. We suggest that this hearing effect could be used as an aid in therapy control when quinine drug assay ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(90)90069-q
更新日期:1990-11-01 00:00:00
abstract::Yellow fever (YF), an arthropod-borne viral disease, occurs in regions of tropical America and Africa. Sylvatic YF is endemic in the north and west of Brazil. Urban YF, on the other hand, has not been reported in the country since 1942. However, the widespread presence of the YF urban vector in Brazil has lead to conc...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2003.12.019
更新日期:2004-12-01 00:00:00
abstract::The present paper records the incidence of chancroid in northern Nigeria. Out of 776 new patients registered at the Special Treatment Clinic (STC) of the Ahmadu Bello University Teaching Hospital (ABUTH) Zaria during February to August 1982, 34 cases (4.38%) were diagnosed as chancroid. Direct smear examination for Ha...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(83)90198-0
更新日期:1983-01-01 00:00:00
abstract::Simple pit latrines often represent the cheapest form of sanitation for poor communities. However, simple latrines lack a concrete slab and are therefore classified as an unimproved form of sanitation. This study collected soil samples in simple pit latrines and analysed them for the presence of helminth eggs; 71% of ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2012.08.002
更新日期:2012-11-01 00:00:00
abstract::Thirty-six hospital in-patients in London had breath-hydrogen concentrations measured after 50 g lactose were given orally; in 23 or them serial blood glucose concentrations were also estimated. Eight had tropical malabsorption (TM), 14 were Europeans with no detectable disease (normal group) and 14 who also had no de...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(78)90208-0
更新日期:1978-01-01 00:00:00