Abstract:
:Polymerase chain reaction (PCR) is now widely used in malaria research for analysis of field samples. However, little has been reported regarding loss of sensitivity due to field methodology. Therefore, studies were carried out in relation to blood sampling (anticoagulants, culture medium, filter paper), storage (temperature, time and immediate lysis) and handling (repeated thawing and freezing). The PCR was unaffected by citrate and EDTA but partly inhibited by heparin (inhibition was reversed by heparinase at optimal concentrations). Samples collected on filter paper showed a significant 100-fold lower sensitivity (compared to control samples frozen immediately after collection) when stored at 30 degrees C and 60% humidity; and the paper quality appeared to be critical. Storage of unprocessed whole blood at 4 degrees C, 20 degrees C or 30 degrees C rarely resulted in any loss of sensitivity. Repeated thawing generally resulted in 10-fold loss of sensitivity compared to blood kept frozen until DNA extraction. The presence of antimalarial drug did not apparently affect sensitivity. We conclude that the mode of collection and storage of blood samples may influence the sensitivity of detection of malaria parasites by PCR. This may be critical in studies including individuals with low parasitaemia, mixed infections and comparison of data from different settings.
journal_name
Trans R Soc Trop Med Hygauthors
Färnert A,Arez AP,Correia AT,Björkman A,Snounou G,do Rosário Vdoi
10.1016/s0035-9203(99)90177-3subject
Has Abstractpub_date
1999-01-01 00:00:00pages
50-3issue
1eissn
0035-9203issn
1878-3503journal_volume
93pub_type
杂志文章,多中心研究abstract:BACKGROUND:Cryptosporidium spp. are enteric parasites that infect humans and animals. In immunocompromised patients infection can be fatal. This study was conducted to identify sub-populations of Cryptosporidium hominis and C. parvum isolates from HIV-seropositive patients in Equatorial Guinea. METHODS:In a previous s...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,多中心研究
doi:10.1093/trstmh/tru108
更新日期:2014-09-01 00:00:00
abstract::Arboviruses are maintained and transmitted through an alternating biological cycle in arthropods and vertebrates, with largely incidental disease in humans and animals. As such, they provide excellent examples of One Health, as their health impact is inextricably linked to their vertebrate hosts, their arthropod vecto...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/trx045
更新日期:2017-06-01 00:00:00
abstract::This study aims at estimating the recent trends in HIV-1 prevalence and the factors associated with infection among pregnant women in the Gulu District of north Uganda, a rural area severely affected by civil strife. In 2000-2003, a total of 4459 antenatal clinic attendees of Lacor Hospital were anonymously tested for...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2005.09.002
更新日期:2006-06-01 00:00:00
abstract::The strain diversity of 100 Mycobacterium tuberculosis isolates collected over a period of 18 months from tuberculosis (TB) cases in Sri Lanka was studied by spoligotyping. When compared to the international spoligotyping database, 43 spoligotype patterns were identified, of which 20 were previously described. The maj...
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
更新日期:2008-10-01 00:00:00
abstract:BACKGROUND:The state of Rio de Janeiro has been important since 1986 as a portal for the introduction of dengue virus (DENV) into Brazil and dissemination of the virus throughout the country. This study describes an active surveillance of DENV in the state of Rio de Janeiro from 2004 to 2008. METHOD:A total of 14 408 ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/trs091
更新日期:2013-03-01 00:00:00
abstract::Melioidosis has never been officially reported from Cambodia. Here we report two cases, a 58-year-old male (case 1) and a 49-year-old female (case 2) who presented with respiratory illnesses featuring multiple lung abscesses. The sputum culture of both patients, taken in the framework of a laboratory-based study on ae...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/S0035-9203(08)70007-5
更新日期:2008-12-01 00:00:00
abstract::The prevalence, intensity and clinical manifestations of onchocerciasis were investigated in three village communities along the Bahr El Arab and its tributaries in Southern Darfur, Western Sudan. Onchocerca volvulus has not been reported from this region before. Over 300 people were examined and the selection of pati...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(86)90252-x
更新日期:1986-01-01 00:00:00
abstract::The role of the mucosal immune response against Cryptosporidium has been suggested by studies on the therapeutic effects of hyperimmune colostrum. In order to study the intestinal response to this infection, we have developed a sandwich-type time-resolved immunofluorometric assay for the determination of anti-Cryptosp...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(93)90152-g
更新日期:1993-05-01 00:00:00
abstract::By microinjection of cryopreserved microfilariae (mf) into nulliparous flies, a comparison of the lengths of the infective larvae (L3) of Onchocerca volvulus and O. ochengi from the head of Simulium damnosum s.l. (presumed S. sirbanum) has been made. The suitability of S. sirbanum as a host was similar for both Onchoc...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(92)90443-g
更新日期:1992-01-01 00:00:00
abstract::In French Guiana, American cutaneous leishmaniasis is localized in the skin. The host response appears to be effective since few extra- or intracellular organisms can be found in tissue lesions, and we never observed any cutaneous dissemination or visceral involvement. However, this response is not fully effective sin...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(88)90419-1
更新日期:1988-01-01 00:00:00
abstract::The effect of levamisole hydrochloride and mebendazole on Angiostrongylus malaysiensis infection in albino rats was studied. Animals at different stages of infection were treated with various oral doses of levamisole and mebendazole with the aim of finding an effective treatment regime. Levamisole was most effective f...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(82)90135-3
更新日期:1982-01-01 00:00:00
abstract::Although intestinal helminth and protozoan infections are prevalent throughout the world, their impact is poorly known. Nevertheless, the morbidity and mortality that occur have stimulated research into host resistance and pathogenesis. Unfortunately, despite an increasing knowledge base, the actual effector molecules...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,评审
doi:10.1016/0035-9203(86)90372-x
更新日期:1986-01-01 00:00:00
abstract::Pyomyositis remains poorly documented in tropical Latin America. We therefore performed a retrospective review of cases admitted to a hospital in the upper Negro river basin during 2002-2006. Seasonality was assessed by the cosinor model and independent predictors of outcome were identified by logistic regression. Det...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2012.06.008
更新日期:2012-09-01 00:00:00
abstract::Although known for many years, non-filarial elephantiasis remains a public health problem in tropical Africa, including the farming community of Ethiopia. The problem may be exacerbated in women who shoulder most of the burden of agricultural labour in the countryside. The intention of this brief review is to emphasis...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,评审
doi:10.1016/j.trstmh.2007.08.001
更新日期:2007-12-01 00:00:00
abstract::This article reviews peer-reviewed publications and book chapters on the history, epidemiology, genetics, ecology, pathogenesis, pathology and management of podoconiosis (endemic non-filarial elephantiasis). Podoconiosis is a non-infectious geochemical elephantiasis caused by exposure of bare feet to irritant alkalic ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,评审
doi:10.1016/j.trstmh.2007.08.013
更新日期:2007-12-01 00:00:00
abstract::An outbreak of acute diarrhoeal disease in a village in southern India was investigated through personal interviews of all households. Maps were drawn using geographic information system (GIS) tools of the water supply system, sewage channels and areas with observed faecal contamination of soil within and around the v...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2006.11.005
更新日期:2007-06-01 00:00:00
abstract::The enzyme-linked immunosorbent assay (ELISA) using Toxocara canis larva-specific antigens was used to confirm a presumptive clinical diagnosis of visceral larva migrans in patients whose serum specimens were submitted to the Center for Disease Control. The clinical and epidemiological characteristics of patients with...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(79)90077-4
更新日期:1979-01-01 00:00:00
abstract::Among many other factors, malaria plays a major causative role of anaemia globally. The mechanisms leading to anaemia in the course of malaria are extremely diverse, involving immunological factors that act differently according to age and malaria epidemiology. The malaria-attributable fraction of anaemia may then dif...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/tru012
更新日期:2014-04-01 00:00:00
abstract::Eight weeks following infection with Schistosoma mansoni ICR strain mice showed much more marked hepatic fibrosis than did C57BL/6 mice or hamsters. None the less, extracts of the hepatic granulomata of these animals had similar fibroblast stimulating activity when assayed in vitro. ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(85)90369-4
更新日期:1985-01-01 00:00:00
abstract::The venom of the South American rattlesnake Crotalus durissus terrificus was first reported to have mainly haemolytic and neurotoxic physiopathological activities. Later studies demonstrated the systemic myotoxic action of the venom, characterized by the release of myoglobin from damaged skeletal muscle into serum and...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(88)90044-2
更新日期:1988-01-01 00:00:00
abstract::This is the first report in which a marine mollusc, Oliva vidua fulminans (olives), generally not known to be poisonous, was responsible for death in five children after consuming boiled olives with tamarind. The onset of symptoms was rapid 10 to 20 min after consumption of the olives. Signs and symptoms included naus...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(86)90197-5
更新日期:1986-01-01 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::A limited outbreak of symptomatic intestinal and extraintestinal amoebiasis within a family complex is described. The infection was almost certainly transmitted by a Philippino housemaid, who was an asymptomatic carrier of Entamoeba histolytica infection acquired in her native country. Starch-gel electrophoresis showe...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(95)90029-2
更新日期:1995-07-01 00:00:00
abstract::Tracking the history of the discovery of mycetoma is not simple because identifying the roots of medical knowledge depends on utilising sources that employ imprecise and sometimes confusing descriptions when compared with those based on modern medical terminology. Ancient sources of information include writings, such ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/traa134
更新日期:2020-11-17 00:00:00
abstract::In 2005, a Marburg haemorrhagic fever (MHF) outbreak occurred in Uíge province, Angola, which had its epicentre in Uíge municipality. Concurrently, a health facility located a considerable distance from the outbreak's epicentre reported a drastic reduction in attendance, possibly due to a remote effect of the ongoing ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2008.09.001
更新日期:2009-02-01 00:00:00
abstract:BACKGROUND:Achromobacter xylosoxidans is described as being resistant to antiseptics and disinfectants. We studied in vitro the ability of five strains to survive and grow in such solutions, with and without starvation. METHODS:Bacterial suspensions in rich media and in distilled water were inoculated into eight antis...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/trz016
更新日期:2019-06-01 00:00:00
abstract::Clostridium difficile is the most commonly identified bacterial cause of nosocomial and HIV-related diarrhea. In many developing countries, antibiotic access is unregulated. Nigeria has the third highest HIV burden worldwide. Due to perceptions of low prevalence and resource incapacity, patients with diarrhea are not ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,多中心研究
doi:10.1016/j.trstmh.2011.07.014
更新日期:2011-11-01 00:00:00
abstract::Surveys of the health of schoolchildren in Tanga Region, Tanzania and Volta Region, Ghana are reported. Two age groups of both sexes were studied: 8-9 and 12-13 years old. Children themselves tend to have a poor perception of their health status. This is confirmed by biomedical surveys. Evidence was common of chronic ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/s0035-9203(98)90999-3
更新日期:1998-05-01 00:00:00
abstract::Epilepsy is a major health problem worldwide, and neurocysticercosis (NCC) is one of the important causes of epilepsy in the tropics. The present study was carried out in a rural pig farming community of north India to estimate the prevalence of NCC in patients with active epilepsy (AE) and to determine the associated...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章,多中心研究
doi:10.1016/j.trstmh.2008.07.015
更新日期:2009-02-01 00:00:00
abstract::The effect of prior injections on the pattern and severity of paralytic poliomyelitis has been examined by a retrospective analysis of case notes from an outpatient pediatric clinic in South India. Of 262 children with acute polio, 176 had received unnecessary injections < 48 h before paralysis and 12 had received dip...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(92)90104-k
更新日期:1992-09-01 00:00:00