Abstract:
BACKGROUND:Plasmodium falciparum delayed clearance with the use of artemisinin-based combination therapy (ACTs) has been reported in some African countries. Single nucleotide polymorphisms (SNPs) in two genes, P. falciparum adaptor protein complex 2 mu subunit (pfap2mu) and ubiquitin specific protease 1 (pfubp1), have been linked to delayed clearance with ACT use in Kenya and recurrent imported malaria in Britain. With over 12 years of ACT use in Ghana, this study investigated the prevalence of SNPs in the pfap2mu and pfubp1 in Ghanaian clinical P. falciparum isolates to provide baseline data for antimalarial drug resistance surveillance in the country. METHODS:Filter paper blood blots collected in 2015-2016 from children aged below 9 years presenting with uncomplicated malaria at hospitals in three sentinel sites Begoro, Cape Coast and Navrongo were used. Parasite DNA was extracted from 120 samples followed by nested polymerase chain reaction (nPCR). Sanger sequencing was performed to detect and identify SNPs in pfap2mu and pfubp1 genes. RESULTS:In all, 11.1% (9/81) of the isolates carried the wildtype genotypes for both genes. A total of 164 pfap2mu mutations were detected in 67 isolates whilst 271 pfubp1 mutations were observed in 72 isolates. The majority of the mutations were non-synonymous (NS): 78% (128/164) for pfap2mu and 92.3% (250/271) for pfubp1. Five unique samples had a total of 215 pfap2mu SNPs, ranging between 15 and 63 SNPs per sample. Genotypes reportedly associated with ART resistance detected in this study included pfap2mu S160N (7.4%, 6/81) and pfubp1 E1528D (7.4%, 6/81) as well as D1525E (4.9%, 4/81). There was no significant difference in the prevalence of the SNPs between the three ecologically distinct study sites (pfap2mu: χ2 = 6.905, df = 2, P = 0.546; pfubp1: χ2 = 4.883, df = 2, P = 0.769). CONCLUSIONS:The detection of pfap2mu and pfubp1 genotypes associated with ACT delayed parasite clearance is evidence of gradual nascent emergence of resistance in Ghana. The results will serve as baseline data for surveillance and the selection of the genotypes with drug pressure over time. The pfap2mu S160N, pfubp1 E1528D and D1525E must be monitored in Ghanaian isolates in ACT susceptibility studies, especially when cure rates of ACTs, particularly AL, is less than 100%.
journal_name
Parasit Vectorsjournal_title
Parasites & vectorsauthors
Adams T,Ennuson NAA,Quashie NB,Futagbi G,Matrevi S,Hagan OCK,Abuaku B,Koram KA,Duah NOdoi
10.1186/s13071-018-2762-3subject
Has Abstractpub_date
2018-03-12 00:00:00pages
175issue
1issn
1756-3305pii
10.1186/s13071-018-2762-3journal_volume
11pub_type
杂志文章abstract:BACKGROUND:Malaria remains a major public health threat in Cameroon and disease prevention is facing strong challenges due to the rapid expansion of insecticide resistance in vector populations. The present review presents an overview of published data on insecticide resistance in the main malaria vectors in Cameroon t...
journal_title:Parasites & vectors
pub_type: 杂志文章,评审
doi:10.1186/s13071-017-2417-9
更新日期:2017-10-10 00:00:00
abstract:BACKGROUND:Triatomines are blood-sucking vectors of Trypanosoma cruzi, the causative agent of Chagas disease. During feeding, triatomines surpass the skin host response through biomolecules present in their saliva. Dendritic cells (DCs) play a crucial role in the induction of the protection to aggressive agents, includ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-016-1890-x
更新日期:2016-12-09 00:00:00
abstract:BACKGROUND:Leishmaniasis represents an important public health problem in Brazil. The continuous process of urbanization and expansion of human activities in forest areas impacts natural habitats, modifying the ecology of some species of Leishmania, as well as its vectors and reservoirs and, consequently, changes the e...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-2742-7
更新日期:2018-03-07 00:00:00
abstract:BACKGROUND:The application of the sterile insect technique (SIT) requires mass-production of sterile males of good biological quality. The size of the project area will in most cases determine whether it is more cost effective to produce the sterile flies locally (and invest in a mass-rearing facility) or import the st...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-0869-3
更新日期:2015-05-01 00:00:00
abstract:BACKGROUND:The brown dog tick Rhipicephalus sanguineus (sensu stricto) is reputed to be the most widespread tick of domestic dogs worldwide and has also been implicated in the transmission of many pathogens to dogs and humans. For more than two centuries, Rh. sanguineus (s.s.) was regarded as a single taxon, even consi...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-2941-2
更新日期:2018-07-09 00:00:00
abstract:BACKGROUND:Psoroptes cuniculi can parasitise the ear canal of the rabbit, and cause the afflicted animals to cease feeding and become severely debilitated, sometimes resulting in death. In this study, we examined the oxidative status and inflammatory level of the peripheral blood of rabbits infested with Psoroptes cuni...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-7-124
更新日期:2014-03-25 00:00:00
abstract:BACKGROUND:Natural compounds from plants are known to provide a source of anthelmintic molecules. In previous studies, we have shown that plant extracts from the plant Picria fel-terrae Lour. and particular fractions thereof have activity against the free-living nematode Caenorhabditis elegans, causing quite pronounced...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3429-4
更新日期:2019-04-25 00:00:00
abstract:BACKGROUND:A cytogenetic analysis of the new local triploid population of the caryophyllidean tapeworm Atractolytocestus huronensis, a unique parthenogenetic species with the ability to colonise new regions, was performed to understand the inner structure of its chromosome complement. METHODS:A karyotype analysis was ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3420-0
更新日期:2019-04-11 00:00:00
abstract:BACKGROUND:The genus Marshallagia (Family Haemonchidae, subfamily Ostertagiinae) contains multiple species of nematodes parasitising the abomasum (or duodenum) of ruminants, in particular of Caprinae. Male specimens have been described to be polymorphic with the frequent/major morphotype initially described in the genu...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-020-04265-1
更新日期:2020-08-12 00:00:00
abstract:BACKGROUND:Susceptibility of Ae. aegypti mosquito to dengue virus (DENV) varies geographically and can be influenced by climatic factors such as temperature, which affect the incidence, seasonality and distribution of vector-borne diseases. The first outbreak of dengue fever (DF) in Kenya occured in 1982 in the coastal...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-7-435
更新日期:2014-09-15 00:00:00
abstract:BACKGROUND:Arboviruses are a growing public health concern in Europe, with both endemic and exotic arboviruses expected to spread further into novel areas in the next decades. Predicting where future outbreaks will occur is a major challenge, particularly for regions where these arboviruses are not endemic. Spatial mod...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-020-04339-0
更新日期:2020-09-10 00:00:00
abstract:BACKGROUND:Cyclospora is a protistan parasite that causes enteritis in several species of animals including humans. The aim of this study was to investigate the presence of Cyclospora in captive non-human primates. METHODS:A total of 119 faecal samples from Pan troglodytes, Macaca sylvanus, Cercopithecus cephus, Eryth...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-0872-8
更新日期:2015-05-15 00:00:00
abstract:BACKGROUND:Ecto-Nucleoside Triphosphate Diphosphohydrolases (Ecto-NTPDases) are enzymes that hydrolyze tri- and/or di-phosphate nucleotides. Evidences point to their participation in Trypanosoma cruzi virulence and infectivity. In this work, we evaluate TcNTPDase-1 gene expression in comparison with ecto-NTPDase activi...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-014-0463-0
更新日期:2014-10-05 00:00:00
abstract:BACKGROUND:Bravecto (fluralaner; MSD Animal Health) is a novel systemic ectoparasiticide for dogs providing long-acting flea- and tick-control after a single oral dose. Scalibor Protectorband (deltamethrin; MSD Animal Health) is a collar often used to reduce sandfly feeding for leishmaniasis prevention. This study inve...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-7-105
更新日期:2014-03-19 00:00:00
abstract:BACKGROUND:Culicoides biting midges are biological vectors of arboviruses including bluetongue virus (BTV), Schmallenberg virus (SBV) and African horse sickness virus (AHSV). Zoos are home to a wide range of 'at risk' exotic and native species of animals. These animals have a high value both in monetary terms, conserva...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-020-04018-0
更新日期:2020-03-16 00:00:00
abstract:BACKGROUND:The invasive temperate mosquito Aedes japonicus japonicus is a potential vector for various infectious diseases and therefore a target of vector control measures. Even though established in Germany, it is unclear whether the species has already reached its full distribution potential. The possible range of t...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3366-2
更新日期:2019-03-25 00:00:00
abstract:BACKGROUND:Paratransgenesis is an approach to reducing arthropod vector competence using genetically modified symbionts. When applied to control of Chagas disease, the symbiont bacterium Rhodococcus rhodnii, resident in the gut lumen of the triatomine vector Rhodnius prolixus (Hemiptera: Reduviidae), is transformed to ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-4-77
更新日期:2011-05-14 00:00:00
abstract:BACKGROUND:Loop-mediated isothermal amplification (LAMP) is a very specific, efficient, and rapid gene amplification procedure in which the reaction can run at a constant temperature. In the current study we have developed a LAMP assay to improve the diagnosis of Fasciola spp. in the faeces of sheep. FINDINGS:After th...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-016-1355-2
更新日期:2016-02-05 00:00:00
abstract:BACKGROUND:As evidence of the infection of domestic animals by Anaplasma phagocytophilum and Anaplasma sp. 'Omatjenne' is presently becoming available, understanding the epidemiological and ecological significance of infection is important to quantify the clinical and socio-economic impact of the diseases they cause. ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-2633-y
更新日期:2018-03-09 00:00:00
abstract:BACKGROUND:Reliable maps of the geographical distribution, number of infected individuals and burden estimates of schistosomiasis are essential tools to plan, monitor and evaluate control programmes. Large-scale disease mapping and prediction efforts rely on compiled historical survey data obtained from the peer-review...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-4-142
更新日期:2011-07-20 00:00:00
abstract:BACKGROUND:Hepatocellular carcinoma-associated antigen 59 (HCA59), which is one of the most important excretory/secretory products of Haemonchus contortus (HcESPs), is known to have antigenic functions. However, its immunomodulatory effects on host cells are poorly understood. METHODS:Here, we cloned the HCA59 gene an...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3375-1
更新日期:2019-03-14 00:00:00
abstract:BACKGROUND:Porcine cysticercosis is an emerging agricultural problem in sub-Saharan Africa. This has been documented primarily through cross-sectional studies, however detailed knowledge of the transmission dynamics of this disease in sub-Saharan Africa is lacking. This study aims to describe seasonal variations in ser...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-014-0574-7
更新日期:2014-12-04 00:00:00
abstract::Arboviruses infecting people primarily exist in urban transmission cycles involving urban mosquitoes in densely populated tropical regions. For dengue, chikungunya, Zika and yellow fever viruses, sylvatic (forest) transmission cycles also exist in some regions and involve non-human primates and forest-dwelling mosquit...
journal_title:Parasites & vectors
pub_type: 杂志文章,评审
doi:10.1186/s13071-019-3732-0
更新日期:2019-10-02 00:00:00
abstract:BACKGROUND:Normal-looking skin of dogs with leishmaniosis frequently shows microscopic lesions along with the presence of Leishmania amastigotes. However, histological lesions with or without detection of amastigotes might not occur in less severe clinical cases. In addition, comparative studies between paired clinical...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-017-2051-6
更新日期:2017-03-13 00:00:00
abstract:BACKGROUND:The merozoite of the zoonotic Plasmodium knowlesi invades human erythrocytes via the binding of its Duffy binding protein (PkDBPαII) to the Duffy antigen on the eythrocytes. The Duffy antigen has two immunologically distinct forms, Fya and Fyb. In this study, the erythrocyte-binding assay was used to quantit...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-3118-8
更新日期:2018-09-26 00:00:00
abstract:BACKGROUND:In Morocco, the main strategies of leishmaniasis vector control are based on environmental modifications. Use of local residual indoor spraying with synthetic pyrethroids is often envisaged. The need to evaluate this control method is essential. The current study was conducted to determine the efficacy of an...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-6-354
更新日期:2013-12-13 00:00:00
abstract:BACKGROUND:In the past, immune responses to several Brugia malayi immunodominant antigens have been characterized in filaria-infected populations; however, little is known regarding Wolbachia proteins. We earlier cloned and characterized few B. malayi (trehalose-6-phosphate phosphatase, Bm-TPP and heavy chain myosin, B...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-016-1963-x
更新日期:2017-01-24 00:00:00
abstract:BACKGROUND:Understanding mosquito resting behaviour is important for the control of vector-borne diseases, but this remains a challenge because of the paucity of efficient sampling tools. We evaluated two novel sampling methods in the field: the Sticky Resting Box (SRB) and the Resting Bucket trap (RBu) to test their e...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-1066-0
更新日期:2015-09-17 00:00:00
abstract:BACKGROUND:Sheep scab is a highly contagious disease of sheep caused by the ectoparasitic mite Psoroptes ovis. The disease is endemic in the UK and has significant economic impact through its effects on performance and welfare. Diagnosis of sheep scab is achieved through observation of clinical signs e.g. itching, prur...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-5-7
更新日期:2012-01-10 00:00:00
abstract:BACKGROUND:Surveillance of outdoor resting malaria vector populations is crucial to monitor possible changes in vector resting and feeding behaviour following the widespread use of indoor-based vector control interventions. However, it is seldom included in the routine vector surveillance system in Africa due to lack o...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3535-3
更新日期:2019-05-31 00:00:00