Abstract:
:Hungry Anopheles funestus females were caught in CDC light traps positioned overnight in village houses in which the occupants were protected by bed nets. The sampling was performed in six huts near Muheza, in North-eastern Tanzania, September to November 1972. Parous, unfed mosquitoes were carefully examined, usually under phase-contrast optics, for the presence of developing Wuchereria bancrofti larvae. Because A. funestus seek blood meals at three-day intervals, most filariae were three, six, nine, 12 and 15 days old, and could with confidence be assigned to one of these five easily recognized age groups. Of 3,289 unfed A. funestus examined, 1,723 (52%) were parous. Developing and mature infections amongst the parous were 272 in number. Simultaneous infections of two age groups numbered 21, one mosquito was triply infected, thus there were 249 infected mosquitoes (7-57% of the total). The regression of loge number of infections (y) on estimated age in days (X), agreed with the hypothesis of linearity (r=-0-9967); the equation loge y=5-52-0-1646X suggested an average daily mortality rate of 16-46% in good agreement with the mean 15-6% observed in A. funestus by Gillies & Wilkes. The equation above affords an estimate of the probability of an A. funestus becoming infected at a single random feeding. The expected number of day 0 infections, given by the antilog of the first term of the equation and taken as a fraction of the biting population, gives the estimate. The values obtained were 0-058-0-087. Use of Macdonald's (1952) formula for the sporozoite rate provided estimates of 0-071-081. Age-specific worm densities in A. funestus did not vary significantly between day three and day 15 infections, and no evidence was obtained to suggest that the higher worm burdens influenced the survival of their hosts. The frequency of superinfections did not support the contention that a previously established infection inhibits the chance of a second, younger infection from becoming established.
journal_name
Trans R Soc Trop Med Hygauthors
Krafsur ES,Garrett-Jones Cdoi
10.1016/0035-9203(77)90086-4subject
Has Abstractpub_date
1977-01-01 00:00:00pages
155-60issue
2eissn
0035-9203issn
1878-3503journal_volume
71pub_type
杂志文章abstract:BACKGROUND:Plasmodium vivax malaria has been recognised as an important cause of morbidity in several African countries. The prevalence was previously estimated as 2-5% in eastern Sudan. These estimates are observed to be rising and spreading continuously. The present study was undertaken to investigate the situation o...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/trz044
更新日期:2019-06-04 00:00:00
abstract::Community-based malaria control with integrated primary health care appears to be the most feasible approach for endemic countries in their struggle against malaria. To plan and implement personal protection and vector control measures, there is the need for comprehensive information about local modes of transmission....
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(89)90597-x
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND:Early identification of patients at risk of severe dengue disease (DD) is critical to guide its management. We evaluated whether the atypical lymphocyte count (ALC), generated from the Sysmex automated full blood count analyzer, is predictive of severe thrombocytopenia secondary to Dengue infection. METHODS...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/trz128
更新日期:2020-06-01 00:00:00
abstract:BACKGROUND:We aimed to estimate and compare the ability of clinical tools for dengue diagnosis in a pediatric population. METHODS:We prospectively evaluated episodes of acute febrile syndrome identified during the follow-up of a population-based cohort of children and adolescents residing in a dengue endemic city. We ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/try135
更新日期:2019-04-01 00:00:00
abstract::Amoebic liver pus has an acidic pH. Hence the pleural aspirate from an amoebic empyema due to rupture of an amoebic liver abscess has an acidic pH. In contrast, the pH of pleural aspirates from effusions and empyema of non-amoebic aetiology were noted to have an alkaline pH. The clinical significance of these observat...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 临床试验,杂志文章
doi:10.1016/0035-9203(76)90180-2
更新日期:1976-01-01 00:00:00
abstract::The influence of spatial and temporal factors on onchocerciasis transmission by Simulium exiguum s.l. and S. quadrivittatum in Ecuador was investigated to help develop sampling protocols for entomological surveillance of ivermectin programmes. Flies were collected in alternate months (November 1995-November 1996) at f...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2004.03.012
更新日期:2005-03-01 00:00:00
abstract::The sensitivities for Chagas disease diagnosis of haemoculture, xenodiagnosis, and polymerase chain reaction (PCR) amplification of Trypanosoma cruzi kinetoplast deoxyribonucleic acid (DNA) were compared for 101 patients living in an endemic region who were serologically positive for T. cruzi. PCR gave 60 positive res...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/s0035-9203(96)90111-x
更新日期:1996-03-01 00:00:00
abstract::The spread of chloroquine resistance throughout the world poses a major problem in combating malaria. In the present study, an efficient polymerase chain reaction-single strand conformational polymorphism (PCR--SSCP)-based assay detected the PfCRT K76T point mutation, which is a marker for chloroquine resistance. For ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2005.05.020
更新日期:2006-03-01 00:00:00
abstract::A fibroblast-like cell line derived from the mountain vole Microtus montanus was effective in promoting an increase in the multiplication rate of new and established isolates of Plasmodium falciparum. An increase in multiplication rate was also achieved in the absence of M. montanus cells when cultures of P. falciparu...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(90)90017-9
更新日期:1990-07-01 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
abstract::The development and application of interventions for the control of vector-borne zoonoses requires broad understanding of epidemiological linkages between vector, animal infection and human infection. However, there are significant gaps in our understanding of these linkages and a lack of appropriate data poses a cons...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1093/trstmh/trv115
更新日期:2016-02-01 00:00:00
abstract::Marked spatiotemporal variabilities in mosquito infection of arboviruses, exemplified by the transmission of West Nile virus (WNV) in America, require adaptive strategies for mosquito sampling, pool screening and data analyses. Currently there is a lack of reliable and consistent measures of risk exposure, which may c...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2008.03.019
更新日期:2008-08-01 00:00:00
abstract::Artemisinin derivatives are becoming the first-line treatment for uncomplicated malaria in areas with widespread resistance to chloroquine. Although generally safe and well tolerated, it has been suggested from animal experiments, and more recently from one human study with artemether-lumefantrine, that these compound...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2006.02.017
更新日期:2006-12-01 00:00:00
abstract::During a four-year study on Grenada, 4,754 mongooses were examined, of which 100 (2.1%) were rabid. Of 1,675 mongooses tested for rabies serum neutralizing (SN) antibody, 498 (30%) were positive. During these four years (1971-74) the antibody prevalence rate increased from 20.8% to 43.2%, whereas the number of rabid m...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(81)90143-7
更新日期:1981-01-01 00:00:00
abstract::Twenty-one Entamoeba histolytica isolates from a range of geographical locations and representing 3 different zymodemes were tested under xenic anaerobic conditions for their sensitivities to bacitracin and bactracin zinc. Isolates were over 13 times more sensitive to bacitracin zinc than to bacitracin. Our results in...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(94)90519-3
更新日期:1994-01-01 00:00:00
abstract::Plasmodium falciparum in Thailand is highly resistant to available antimalarial drugs. Artemether, a derivative of artemisinin, is a promising compound currently used to cope with this situation but the course of treatment has to be at least 5 d. An effective short treatment course of this drug is possible when used i...
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
doi:10.1016/0035-9203(95)90549-9
更新日期:1995-05-01 00:00:00
abstract::In Amazonian Brazil most human leishmaniasis is due to Leishmania braziliensis s.l. and is acquired during the clearing of primary climax forest. One of the largest deforestation projects has taken place on the JARI property where plantations of exotic tree species are grown for paper pulp. The ability of the regional...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(83)90288-2
更新日期:1983-01-01 00:00:00
abstract::Infections with Mansonella perstans are common in certain parts of Africa and South America. There is no standard treatment at present. We evaluated the effect of a single high dose of ivermectin (600 micrograms/kg) on microfilaraemia in 7 consecutive patients. No decrease in microfilarial counts could be demonstrated...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(93)90438-v
更新日期:1993-01-01 00:00:00
abstract::This paper reports on adverse reactions following a 12-day course of 6 mg/kg diethylcarbamazine (DEC) therapy in brugian filariasis patients in Indonesia. Microfilaria-positive individuals (n = 26), 'endemic normals' (n = 12) and elephantiasis patients (n = 17) were included in the study. Fever, headache and body ache...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/s0035-9203(99)90194-3
更新日期:1999-01-01 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::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::Cystic echinococcosis (CE), caused by Echinococcus granulosus, and alveolar echinococcosis (AE), due to E. multilocularis, are endemic to large areas of north and northwest China. Here we review features of a severe focus of AE and CE in Ningxia Hui Autonomous Region (NHAR), northwest China. We describe for NHAR the r...
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.2008.01.007
更新日期:2008-04-01 00:00:00
abstract::In a longitudinal study to determine the effect of annual community-based treatment of ocular onchocerciasis with ivermectin, the population living in the 3 most affected villages in the holo-endemic onchocerciasis focus of Asubende in Ghana were re-examined 16 and 24 months after initiating treatment. Ocular microfil...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(91)90051-y
更新日期:1991-03-01 00:00:00
abstract::Lesions due to Mycobacterium ulcerans infection may have more synonyms and eponyms than any other disease. New diseases are named for the person who discovered them, from the place from which they were first described or some major clinical feature. 'Buruli ulcer', the name by which the disease is most frequently know...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 评论,杂志文章,评审
doi:10.1016/j.trstmh.2008.12.009
更新日期:2009-10-01 00:00:00
abstract::Microfilariae of Wuchereria bancrofti and Brugia pahangi were killed by the chewing action of the cibarial and pharyngeal armatures and other papillae and spines in the fore-gut of mosquitoes. The proportion of ingested microfilariae that were killed was largely dependent on the presence and shape of the cibarial arma...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/0035-9203(78)90128-1
更新日期:1978-01-01 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::Lysophospholipid analogues (LPAs) comprise a class of metabolically stable compounds that have been developed as anticancer agents for over two decades, but which have also potent and selective antiparasitic activity, particularly against trypanosomatid parasites such as Leishmania and Trypanosoma cruzi, both in vitro...
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.2006.03.010
更新日期:2006-12-01 00:00:00
abstract::Tungiasis (jigger) is endemic in many impoverished communities in many parts of Brazil. Forty-seven individuals entering an endemic area were followed up for a period of six weeks and regularly examined for the presence of newly embedded sand fleas. At the end of the third week, the attack rate of Tunga penetrans infe...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2003.12.004
更新日期:2004-07-01 00:00:00
abstract::We performed pulsed-field gel electrophoresis (XbaI) on 114 bloodstream isolates of Salmonella enterica serotype Paratyphi A and S. enterica serotype Typhi collected from febrile patients in Kathmandu, Nepal. Of the 56 S. Paratyphi A isolates, 51 (91%) were indistinguishable, which suggests the emergence of a single c...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/j.trstmh.2005.12.011
更新日期:2006-11-01 00:00:00
abstract::Fifty-five strains of Helicobacter pylori isolated from November 1997 until October 1998 from 33 female and 22 male adults attending for endoscopy at the Evangel Hospital, Jos, Nigeria were assayed for antibiotic susceptibility to amoxycillin, clarithromycin, metronidazole and tetracycline by the E-test strip method. ...
journal_title:Transactions of the Royal Society of Tropical Medicine and Hygiene
pub_type: 杂志文章
doi:10.1016/s0035-9203(99)90089-5
更新日期:1999-11-01 00:00:00