Publications

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evolutionary relationships and systematics of the alphaviruses.partial e1 envelope glycoprotein gene sequences and complete structural polyprotein sequences were used to compare divergence and construct phylogenetic trees for the genus alphavirus. tree topologies indicated that the mosquito-borne alphaviruses could have arisen in either the old or the new world, with at least two transoceanic introductions to account for their current distribution. the time frame for alphavirus diversification could not be estimated because maximum-likelihood analyses indic ...200111581380
replication cycle of chikungunya: a re-emerging arbovirus.arboviruses (or arthropod-borne viruses), represent a threat for the new century. the 2005-2006 year unprecedented epidemics of chikungunya virus (chikv) in the french reunion island in the indian ocean, followed by several outbreaks in other parts of the world such as india, have attracted the attention of clinicians, scientists, and state authorities about the risks linked to this re-emerging mosquito-borne virus. chikv, which belongs to the alphaviruses genus, was not previously regarded as a ...200919732931
phylogenetic analysis of buggy creek virus: evidence for multiple clades in the western great plains, united states of america.we present the first detailed phylogenetic analysis of buggy creek virus (bcrv), a poorly known alphavirus with transmission cycles involving a cimicid swallow bug (oeciacus vicarius) vector and cliff swallows (petrochelidon pyrrhonota) and house sparrows (passer domesticus) as the principal avian hosts. nucleotide sequences of a 2,075-bp viral envelope glycoprotein-coding region, covering the entire pe2 gene, were determined for 33 bcrv isolates taken from swallow bugs at cliff swallow colonies ...200616936062
development of reverse transcription-pcr assays specific for detection of equine encephalitis viruses.specific and sensitive reverse transcription-pcr (rt-pcr) assays were developed for the detection of eastern, western, and venezuelan equine encephalitis viruses (eee, wee, and vee, respectively). tests for specificity included all known alphavirus species. the eee-specific rt-pcr amplified a 464-bp region of the e2 gene exclusively from 10 different eee strains from south and north america with a sensitivity of about 3,000 rna molecules. in a subsequent nested pcr, the specificity was confirmed ...200010747138
global emergence of alphaviruses that cause arthritis in humans.arthropod-borne viruses (arboviruses) may cause severe emerging and re-emerging infectious diseases, which pose a significant threat to human and animal health in the world today. these infectious diseases range from mild febrile illnesses, arthritis, and encephalitis to haemorrhagic fevers. it is postulated that certain environmental factors, vector competence, and host susceptibility have a major impact on the ecology of arboviral diseases. presently, there is a great interest in the emergence ...201526689654
biology and distribution of aedes albopictus and aedes aegypti in madagascar.the biology and distribution of the 2 malagasy stegomyia species, aedes aegypti and aedes albopictus, is updated and reported. aedes aegypti is present in the western and southern regions and ae. albopictus in the east and on the high plateau. some unusual locations are noted. the ranges of ae. albopictus and ae. aegypti on madagascar overlap only slightly. aedes aegypti is present in the west and in the south, while the ae. albopictus distribution area is in the east and on the central high pla ...19892746207
a field-deployable reverse transcription recombinase polymerase amplification assay for rapid detection of the chikungunya virus.chikungunya virus (chikv) is a mosquito-borne virus currently transmitted in about 60 countries. chikv causes acute flu-like symptoms and in many cases prolonged musculoskeletal and joint pain. detection of the infection is mostly done using rt-rcr or elisa, which are not suitable for point-of-care diagnosis.201627685649
multi-gene detection and identification of mosquito-borne rna viruses using an oligonucleotide microarray.arthropod-borne viruses are important emerging pathogens world-wide. viruses transmitted by mosquitoes, such as dengue, yellow fever, and japanese encephalitis viruses, infect hundreds of millions of people and animals each year. global surveillance of these viruses in mosquito vectors using molecular based assays is critical for prevention and control of the associated diseases. here, we report an oligonucleotide dna microarray design, termed arbochip5.1, for multi-gene detection and identifica ...201323967358
mosquito-borne arbovirus surveillance at selected sites in diverse ecological zones of kenya; 2007 - 2012.increased frequency of arbovirus outbreaks in east africa necessitated the determination of distribution of risk by entomologic arbovirus surveillance. a systematic vector surveillance programme spanning 5 years and covering 11 sites representing seven of the eight provinces in kenya and located in diverse ecological zones was carried out.201323663381
an updated checklist of mosquito species (diptera: culicidae) from madagascar.an updated checklist of 235 mosquito species from madagascar is presented. the number of species has increased considerably compared to previous checklists, particularly the last published in 2003 (178 species). this annotated checklist provides concise information on endemism, taxonomic position, developmental stages, larval habitats, distribution, behavior, and vector-borne diseases potentially transmitted. the 235 species belong to 14 genera: aedeomyia (3 species), aedes (35 species), anophel ...201627101839
neutralizing antibodies against flaviviruses, babanki virus, and rift valley fever virus in ugandan bats.introduction:a number of arboviruses have previously been isolated from naturally-infected east african bats, however the role of bats in arbovirus maintenance is poorly understood. the aim of this study was to investigate the exposure history of ugandan bats to a panel of arboviruses.materials and methods:insectivorous and fruit bats were captured from multiple locations throughout uganda during 2009 and 2011-2013. all serum samples were tested for neutralizing antibodies against west nile viru ...201829511459
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