| chikungunya: an emerging and spreading arthropod-borne viral disease. | the virus causing chikungunya disease was identified over 50 years ago; however, because the disease appeared only in developing countries, little research on it has been done. research interest in the disease increased after an important epidemiological outbreak occurred in 2005 on the french metropolitan island of la reunion located in the south-eastern part of the indian ocean. in 2007, a smaller outbreak of chikungunya developed in the north-eastern part of italy made possible by immigration ... | 2009 | 20009275 |
| geographic distribution and developmental sites of aedes albopictus (diptera: culicidae) during a chikungunya epidemic event. | aedes albopictus is generally considered to have a low vectorial capacity because of its lack of host specificity. nevertheless, it has been the sole vector of the chikungunya virus in recent explosive epidemics on the islands of la réunion and mauritius. we report on investigations of the seasonal prevalence, container preferences, and geographic distribution of the species on la réunion. ae. albopictus showed strong ecological plasticity. in the warm wet season, small disposable containers wer ... | 2008 | 18171104 |
| [aedes albopictus, vector of chikungunya and dengue viruses in reunion island: biology and control]. | chikungunya virus (chikv) and dengue virus (denv) are mosquito-borne viruses transmitted by the aedes genus. dengue is considered as the most important arbovirus disease throughout the world. chikungunya, known from epidemics in continental africa and asia, has up to now been poorly studied. it has been recently responsible for the severe 2004-2007 epidemic reported in the indian ocean (io), which has caused several serious health and economic problems. this unprecedented epidemic of the io has ... | 2008 | 18416242 |
| chikungunya: a risk for mediterranean countries? | the italian outbreak of the 2007 summer and the active spreading of the asian tiger mosquito aedes albopictus in southern europe, raise the possibility of local transmission of chikungunya (chik) in mediterranean countries. established in at least 12 countries in southern europe since the end of the 1970s and in southern france since 2004, ae. albopictus, is invading the french mediterranean coast from east to west. to determine the possibility of an outbreak of chik in southern france, we provi ... | 2008 | 18005927 |
| chikungunya-wolbachia interplay in aedes albopictus. | a severe chikungunya (chik) outbreak recently hit several countries of the indian ocean. on la réunion island, aedes albopictus was incriminated as the major vector. this mosquito species is naturally co-infected with two distinct strains of the endosymbiont wolbachia, namely walba and walbb, which are increasingly attracting interest as potential tools for vector control. a pcr quantitative assay was developed to investigate wolbachia/mosquito host interactions. we show that wolbachia densities ... | 2008 | 19133077 |
| dispersal and survival of male and female aedes albopictus (diptera: culicidae) on réunion island. | mouse-baited traps were used to assess the longevity and dispersal of male and female aedes albopictus by mark-release-recapture at two sites on la réunion island. recapture rate was high, and mosquitoes of both sexes appeared up to 23 d after release. a daily survival probability of approximately 0.95 for males and females, far higher than expected, was estimated from these results. there was evidence that both sexes prefer to follow corridors of vegetation rather than crossing open spaces. pop ... | 2009 | 19769043 |
| a single mutation in chikungunya virus affects vector specificity and epidemic potential. | chikungunya virus (chikv) is an emerging arbovirus associated with several recent large-scale epidemics. the 2005-2006 epidemic on reunion island that resulted in approximately 266,000 human cases was associated with a strain of chikv with a mutation in the envelope protein gene (e1-a226v). to test the hypothesis that this mutation in the epidemic chikv (strain lr2006 opy1) might influence fitness for different vector species, viral infectivity, dissemination, and transmission of chikv were comp ... | 2007 | 18069894 |
| [aedes albopictus: chronical of a spreading vector]. | over the last 50 years the asian tiger mosquito aedes (stegomyia) albopictus (skuse) has spread to all continents in the old and new world. this anthropophilous species is able to adapt to most climates. although long considered as a secondary disease vector, it has been shown to be competent for arbovirus transmission under laboratory conditions. in several locations that it has invaded, the tiger mosquito has played a major role in arbovirus transmission (dengue fever and chikungunya). a recen ... | 2006 | 16924811 |
| retrospective survey of chikungunya disease in réunion island hospital staff. | réunion island (indian ocean) has been suffering from its first known chikungunya virus (chikv) epidemic since february 2005. to achieve a better understanding of the disease, a questionnaire was drawn up for hospital staff members and their household. chikv infected about one-third of the studied population, the proportion increasing with age and being higher in women. presence of a garden was associated with chikv infection. the geographical distribution of cases was concordant with insect vec ... | 2008 | 17433130 |
| [chikungunya infection in pregnancy: evidence for intrauterine infection in pregnant women and vertical transmission in the parturient. survey of the reunion island outbreak]. | since february 2005, an outbreak of chikungunya virus (chikv) infections occurred in reunion island. it is transmitted by the aedes albopictus mosquito. neonatal cases observations suggest possible fetal transmission during pregnancy. material [corrected] and methods. observations made in 160 pregnant mothers infected by chikv between june 1, 2005 and february 28, 2006, in the south of reunion island were recorded. | 2006 | 17003745 |
| novel chikungunya virus variant in travelers returning from indian ocean islands. | chikungunya virus (chikv) emerged in indian ocean islands in 2005 and is causing an ongoing outbreak that involves >260,000 patients, including travelers returning home from these islands. we investigated cases in 4 patients returning from mayotte and reunion islands with chikv infection and a nurse infected in metropolitan france after direct contact with the blood of a traveler. four patients had tenosynovitis and pain at wrist pressure, and 1 had life-threatening manifestations. four chikv st ... | 2006 | 17176562 |
| aedes albopictus as an epidemic vector of chikungunya virus: another emerging problem? | | 2006 | 16870524 |
| evaluation of the human igg antibody response to aedes albopictus saliva as a new specific biomarker of exposure to vector bites. | the spread of aedes albopictus, a vector for re-emergent arbovirus diseases like chikungunya and dengue, points up the need for better control strategies and new tools to evaluate transmission risk. human antibody (ab) responses to mosquito salivary proteins could represent a reliable biomarker for evaluating human-vector contact and the efficacy of control programs. | 2012 | 22363823 |
| population structure of aedes albopictus from la réunion island (indian ocean) with respect to susceptibility to a dengue virus. | ten f1 aedes albopictus samples collected from réunion island in the indian ocean were tested for oral susceptibility to dengue 2 virus and 20 were analysed for genetic polymorphism by starch gel electrophoresis. data from infection rates defined two distinct geographical areas: east coast vs. west coast. genetic differentiation was found to be dependent on ecological factors and the biological characteristics of ae. albopictus. these results have implications for the vector ecology and pattern ... | 2001 | 11737274 |
| household-level expenditure on protective measures against mosquitoes on the island of la réunion, france. | for decades la réunion has experienced a number of epidemics that have resulted in efforts to control the density of aedes species on this island. this study was conducted to assess household-level expenditure on protective measures against mosquito nuisance on the island of la réunion in 2012. | 2014 | 24392170 |
| [the reemergence of the chikungunya virus in réunion island on 2010: evolution of the mosquito control practices.] | the re-emergence of local transmission of chikungunya virus caused by aedes albopictus since march 2010 in the réunion island, french territory in the southwest indian ocean, calls for better epidemiological surveys, vector control, and community-based chikungunya control. this paper describes the strategy and the new ways of vector control applied since the last major chikungunya virus outbreak in 2005-2007, and the high levels of collaboration with mayors and local associations for community i ... | 2010 | 21181327 |
| orally co-infected aedes albopictus from la reunion island, indian ocean, can deliver both dengue and chikungunya infectious viral particles in their saliva. | first described in humans in 1964, reports of co-infections with dengue (denv) and chikungunya (chikv) viruses are increasing, particularly after the emergence of chikungunya (chik) in the indian ocean in 2005-2006 due to a new variant highly transmitted by aedes albopictus. in this geographic area, a dengue (den) outbreak transmitted by ae. albopictus took place shortly before the emergence of chik and co-infections were reported in patients. a co-infection in humans can occur following the bit ... | 2010 | 20544013 |
| [aedes albopictus and aedes aegypti at ile de la réunion]. | aedes albopictus and aedes aegypti are both found on the island. the former, being the probable vector of dengue on the island, is highly anthropophilic. it breeds in domestic environments as well as in natural breeding sites. the latter has a more restricted distribution and is never anthropophilic. larvae of ae. aegypti are only found in natural habitats, always associated with ae. albopictus, but in small proportions. such an ecology and behaviour for the typicus form of ae. aegypti are abnor ... | 1994 | 7726666 |
| the native wolbachia symbionts limit transmission of dengue virus in aedes albopictus. | the chikungunya (chik) outbreak that struck la reunion island in 2005 was preceded by few human cases of dengue (den), but which surprisingly did not lead to an epidemic as might have been expected in a non-immune population. both arboviral diseases are transmitted to humans by two main mosquito species, aedes aegypti and aedes albopictus. in the absence of the former, ae. albopictus was the only species responsible for viral transmission on la reunion island. this mosquito is naturally super-in ... | 2012 | 23301109 |
| mathematical studies on the sterile insect technique for the chikungunya disease and aedes albopictus. | chikungunya is an arthropod-borne disease caused by the asian tiger mosquito, aedes albopictus. it can be an important burden to public health and a great cause of morbidity and, sometimes, mortality. understanding if and when disease control measures should be taken is key to curtail its spread. dumont and chiroleu (math biosc eng 7(2):315-348, 2010) showed that the use of chemical control tools such as adulticide and larvicide, and mechanical control, which consists of reducing the breeding si ... | 2011 | 22038083 |
| molecular markers for analyses of intraspecific genetic diversity in the asian tiger mosquito, aedes albopictus. | the dramatic worldwide expansion of aedes albopictus (the asian tiger mosquito) and its vector competence for numerous arboviruses represent a growing threat to public health security. molecular markers are crucially needed for tracking the rapid spread of this mosquito and to obtain a deeper knowledge of population structure. this is a fundamental requirement for the development of strict monitoring protocols and for the improvement of sustainable control measures. | 2015 | 25890257 |
| insecticide resistance in culex pipiens quinquefasciatus and aedes albopictus mosquitoes from la réunion island. | resistance to insecticides was monitored on culex pipiens quinquefasciatus mosquitoes collected in twelve localities of la réunion, a geographically isolated island of the indian ocean. this mosquito is of medical concern in the region as a known vector for filariasis and a potential vector for west nile and rift valley fever viruses. our bioassays indicated the presence of resistance to all tested insecticides, i.e. organochlorides, organophosphates and pyrethroids. a molecular investigation re ... | 2010 | 20188834 |
| progressive decrease in aedes aegypti distribution in reunion island since the 1900s. | in reunion island, the distribution of the domestic form of aedes aegypti (l.) has been restricted to natural habitats, in ravines located on the driest west coast over the past 50 yr. it is mainly found in rock holes, where it principally co-occurs with aedes albopictus (skuse), the most common aedes species and the major vector of arboviruses there. to document and understand the changes in ae. aegypti distribution on the island since the beginning of the 20th century, data on its distribution ... | 2009 | 19960710 |
| [chikungunya virus infections in children]. | chikungunya fever is an arbovirosis caused by an alphavirus (chikv) belonging to the togaviridae family. its main vectors are aedes mosquitoes. in its classic form, chikungunya consists in a flu-like illness that can be very disabling, especially by incapacitating arthralgia. in children, the arthropathy is well known to be better tolerated than in adulthood but severe manifestations and complications can occur owing to neurologic, cardiac, hematologic or cutaneous dysfunctions, all carrying a f ... | 2009 | 19836680 |
| [sterile insect technique: targeted control without insecticide]. | sterile insect technique (sit) is a method of disease vector control technique that consists of releasing overwhelming numbers of sterile males. this method provides an environmentally friendly alternative to insecticides. another advantage of sit in comparison with other methods is to provide a targeted species-specific approach. in reunion island, sit has been proposed as a basis for developing a viable method of vector control against aedes albopictus and anopheles arabiensis. the technique h ... | 2012 | 22693930 |
| [new vector control measures implemented between 2005 and 2011 on reunion island: lessons learned from chikungunya epidemic]. | a major chikungunya outbreak concerned 38% of people living in reunion island in 2005-2006. chikungunya is an arthropod-born-virus disease conveyed by mosquitoes called aedes albopictus. the health agency in indian ocean is responsible for vector control. previously, in the early 40s, vector control concerned only malaria prophylaxis in la réunion. then, during the chikungunya outbreak, a new vector control team was installed and learned from this epidemic. the lessons drawn from chikungunya out ... | 2012 | 22693927 |
| sexual performance of male mosquito aedes albopictus. | issues of male fertility must be addressed to support the development of a sterile insect technique (sit) programme for the control of aedes albopictus skuse (diptera: culicidae) populations on reunion island in the indian ocean. the mating ability of a local strain of ae. albopictus was tested using several batches of females and different cage sizes under laboratory conditions. individual males were able to inseminate up to 14 females at an average of 9.5 females per male when exposed to 20 fe ... | 2011 | 21605147 |
| seasonal variation in size estimates of aedes albopictus population based on standard mark-release-recapture experiments in an urban area on reunion island. | the implementation of the sterile insect technique for area-wide vector control requires that natural population density be accurately estimated to determine both the appropriate time to treat and the adequate number of sterile males for release. herein, we used mark-release-recapture (mrr) to derive seasonal abundance estimates of aedes albopictus population sizes within a delimited geographical area in reunion island. population size of ae. albopictus was estimated through four mark-release-re ... | 2015 | 25592432 |
| the 2005-2007 chikungunya epidemic in réunion: ambiguous etiologies, memories, and meaning-making. | from march 2005 to april 2007 the french overseas department and indian ocean island of réunion was significantly affected by an epidemic of chikungunya. chikungunya is a vector-spread disease (by the aedes albopictus mosquito) that leads to painful rheumatic symptoms. the disease infected approximately one third of the island's total population of 802,000 inhabitants (rallu 2009 ). this article is a discussion of local etiological accounts of chikungunya. the primary topic raised by informants ... | 2013 | 23406067 |
| effects of irradiation, presence of females, and sugar supply on the longevity of sterile males aedes albopictus (skuse) under semi-field conditions on reunion island. | the development of the sterile insect technique (sit) for reducing populations of aedes albopictus (skuse), (the vector of chikungunya and dengue fever), was studied in reunion island. for some mosquito species the sterilization process and mating activity may alter male survival. most previous studies were carried out in the laboratory and may inadequately reflect the field situation. we conducted a semi-field experiment to evaluate the impact of sugar supply and mating activity under natural c ... | 2013 | 23206578 |
| [chikungunya virus infection: review through an epidemic]. | the chikungunya virus is an alpha arbovirus, first identified in 1953, transmitted by aedes, mosquitoes, responsible for a little documented uncommon acute specifically tropical disease. its main symptoms are fever, a rash, and debilitating arthralgia. an unprecedented chikungunya epidemic is ongoing on the reunion island (775,000 inhabitants) with over 244,000 reported and 205 deaths (directly or indirectly linked) as of april 20 2006. aedes albopictus, long present on the island, is the assume ... | 2006 | 16725291 |
| ecological interactions in aedes species on reunion island. | two invasive, container-breeding mosquito species, aedes aegypti (stegomyia aegypti) and aedes albopictus (stegomyia albopicta) (diptera: culicidae), have different distribution patterns on reunion island. aedes albopictus occurs in all areas and ae. aegypti colonizes only some restricted areas already occupied by ae. albopictus. this study investigates the abiotic and biotic ecological mechanisms that determine the distribution of aedes species on reunion island. life history traits (duration o ... | 2013 | 23205822 |
| determinants of outbreaks of emerging infectious diseases : the case of chikungunya in indian ocean, 2004-2007. | emerging outbreaks of arboviroses are most often tied to the convergence of a set of factors which have physical and environmental, genetic and biological, ecological, social, political and economic origins. thirteen out of these factors are known as main determinants of emerging infectious disease outbreaks. this paper assesses the role of these factors from exploring the chikungunya outbreak which occurred in indian ocean in 2004-2007, as case study. chikungunya is an alphavirus borne and tran ... | 2017 | 28627853 |
| [updated inventory of mosquitoes (diptera: culicidae) of the island of la réunion, indian ocean]. | a literature analysis coupled with new entomological surveys conducted between 2009 and 2012 led to changes in the list of mosquito species present on the island of la réunion. using morphological criteria, orthopodomyia arboricollis is replaced by or. reunionensis. on the basis of morphometrical and genetic criteria, culex univittatus is replaced by cx. neavei. cx. poicilipes, which was already reported missing 40 years ago, has not been found again. anopheles arabiensis is confirmed as the onl ... | 2013 | 23681758 |
| evidence of habitat structuring aedes albopictus populations in réunion island. | arbovirus vector dynamics and spread are influenced by climatic, environmental and geographic factors. major chikungunya and dengue fever outbreaks occurring the last 10 years have coincided with the expansion of the mosquito vector aedes albopictus to nearly all the continents. we characterized the ecological (larval development sites, population dynamics, insemination and daily survival rates) and genetic (diversity, gene flow, population structure) features of two aedes albopictus populations ... | 2013 | 23556012 |
| vectorial status of the asian tiger mosquito aedes albopictus of la réunion island for zika virus. | la réunion island has been the scene of unusually large epidemics of dengue and chikungunya viruses with aedes albopictus as the sole vector. after experimental oral infection, ae. albopictus from la réunion island can disseminate both dengue and chikungunya viruses but not the asian genotype of zika virus, suggesting a strong midgut barrier to dissemination. autochthonous transmission of the asian genotype of zika virus is improbable on la réunion island. | 2017 | 29194706 |
| importance of mosquito "quasispecies" in selecting an epidemic arthropod-borne virus. | most arthropod-borne viruses (arboviruses), perpetuated by alternation between a vertebrate host and an insect vector, are likely to emerge through minor genetic changes enabling the virus to adapt to new hosts. in the past decade, chikungunya virus (chikv; alphavirus, togaviridae) has emerged on la réunion island following the selection of a unique substitution in the chikv e1 envelope glycoprotein (e1-a226v) of an east-central-south african (ecsa) genotype conferring a higher transmission rate ... | 2016 | 27383735 |