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Analysis of female salivary gland proteins of the Anopheles barbirostris complex (Diptera: Culicidae) in Thailand. Parasitol Res 2010; 107:509-16. [PMID: 20428888 DOI: 10.1007/s00436-010-1883-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Accepted: 04/12/2010] [Indexed: 10/19/2022]
Abstract
Electrophoretic protein profiles of female salivary glands of five sibling species within the Anopheles barbirostris complex, namely A. barbirostris species A1 (Forms A, B, and D), A2, A3, and A4 and Anopheles campestris-like (Forms B and E), were analyzed. At least eight major and several minor protein bands were detected in the glands of each species, of which each morphological region contained different major proteins. The protein profiles distinguished the five sibling species. The variability in major proteins among species was observed in the 40-48, 32-37, and 10-18 kDa ranges. No difference in protein profiles was found in different cytogenetic forms. Polymorphism of the protein profiles within species was only noted in species A4. The lowest major protein (marker) band of each species showed remarkably different relative mobility on SDS-polyacrylamide gels. NanoLC-MS analysis revealed that the marker protein of some species matched with a protein involving in blood feeding, gSG6, of Anopheles gambiae and Anopheles freeborni. These results might be useful for construction of an additional tool to distinguish the five sibling species and lead to further study on the evolution of blood feeding and pathogen transmission.
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Alves-Silva J, Ribeiro JMC, Van Den Abbeele J, Attardo G, Hao Z, Haines LR, Soares MB, Berriman M, Aksoy S, Lehane MJ. An insight into the sialome of Glossina morsitans morsitans. BMC Genomics 2010; 11:213. [PMID: 20353571 PMCID: PMC2853526 DOI: 10.1186/1471-2164-11-213] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Accepted: 03/30/2010] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Blood feeding evolved independently in worms, arthropods and mammals. Among the adaptations to this peculiar diet, these animals developed an armament of salivary molecules that disarm their host's anti-bleeding defenses (hemostasis), inflammatory and immune reactions. Recent sialotranscriptome analyses (from the Greek sialo = saliva) of blood feeding insects and ticks have revealed that the saliva contains hundreds of polypeptides, many unique to their genus or family. Adult tsetse flies feed exclusively on vertebrate blood and are important vectors of human and animal diseases. Thus far, only limited information exists regarding the Glossina sialome, or any other fly belonging to the Hippoboscidae. RESULTS As part of the effort to sequence the genome of Glossina morsitans morsitans, several organ specific, high quality normalized cDNA libraries have been constructed, from which over 20,000 ESTs from an adult salivary gland library were sequenced. These ESTs have been assembled using previously described ESTs from the fat body and midgut libraries of the same fly, thus totaling 62,251 ESTs, which have been assembled into 16,743 clusters (8,506 of which had one or more EST from the salivary gland library). Coding sequences were obtained for 2,509 novel proteins, 1,792 of which had at least one EST expressed in the salivary glands. Despite library normalization, 59 transcripts were overrepresented in the salivary library indicating high levels of expression. This work presents a detailed analysis of the salivary protein families identified. Protein expression was confirmed by 2D gel electrophoresis, enzymatic digestion and mass spectrometry. Concurrently, an initial attempt to determine the immunogenic properties of selected salivary proteins was undertaken. CONCLUSIONS The sialome of G. m. morsitans contains over 250 proteins that are possibly associated with blood feeding. This set includes alleles of previously described gene products, reveals new evidence that several salivary proteins are multigenic and identifies at least seven new polypeptide families unique to Glossina. Most of these proteins have no known function and thus, provide a discovery platform for the identification of novel pharmacologically active compounds, innovative vector-based vaccine targets, and immunological markers of vector exposure.
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Teixeira C, Gomes R, Collin N, Reynoso D, Jochim R, Oliveira F, Seitz A, Elnaiem DE, Caldas A, de Souza AP, Brodskyn CI, de Oliveira CI, Mendonca I, Costa CHN, Volf P, Barral A, Kamhawi S, Valenzuela JG. Discovery of markers of exposure specific to bites of Lutzomyia longipalpis, the vector of Leishmania infantum chagasi in Latin America. PLoS Negl Trop Dis 2010; 4:e638. [PMID: 20351786 PMCID: PMC2843637 DOI: 10.1371/journal.pntd.0000638] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2009] [Accepted: 02/02/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Sand flies deliver Leishmania parasites to a host alongside salivary molecules that affect infection outcomes. Though some proteins are immunogenic and have potential as markers of vector exposure, their identity and vector specificity remain elusive. METHODOLOGY/PRINCIPAL FINDINGS We screened human, dog, and fox sera from endemic areas of visceral leishmaniasis to identify potential markers of specific exposure to saliva of Lutzomyia longipalpis. Human and dog sera were further tested against additional sand fly species. Recombinant proteins of nine transcripts encoding secreted salivary molecules of Lu. longipalpis were produced, purified, and tested for antigenicity and specificity. Use of recombinant proteins corresponding to immunogenic molecules in Lu. longipalpis saliva identified LJM17 and LJM11 as potential markers of exposure. LJM17 was recognized by human, dog, and fox sera; LJM11 by humans and dogs. Notably, LJM17 and LJM11 were specifically recognized by humans exposed to Lu. longipalpis but not by individuals exposed to Lu. intermedia. CONCLUSIONS/SIGNIFICANCE Salivary recombinant proteins are of value as markers of vector exposure. In humans, LJM17 and LJM11 emerged as potential markers of specific exposure to Lu. longipalpis, the vector of Leishmania infantum chagasi in Latin America. In dogs, LJM17, LJM11, LJL13, LJL23, and LJL143 emerged as potential markers of sand fly exposure. Testing these recombinant proteins in large scale studies will validate their usefulness as specific markers of Lu. longipalpis exposure in humans and of sand fly exposure in dogs.
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Affiliation(s)
- Clarissa Teixeira
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Regis Gomes
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Nicolas Collin
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - David Reynoso
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Ryan Jochim
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Fabiano Oliveira
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Amy Seitz
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Dia-Eldin Elnaiem
- Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, Maryland, United States of America
| | - Arlene Caldas
- Universidade Federal do Maranhão, São Luis, Maranhão, Brazil
| | | | | | | | - Ivete Mendonca
- Laboratorio de Leishmanioses, Instituto de Doencas Tropicais Natan Portella and Universidade Federal do Piaui, Teresina, Piaui, Brazil
| | - Carlos H. N. Costa
- Laboratorio de Leishmanioses, Instituto de Doencas Tropicais Natan Portella and Universidade Federal do Piaui, Teresina, Piaui, Brazil
| | - Petr Volf
- Department of Parasitology, Faculty of Science, Charles University in Prague, Prague, Czech Republic
| | - Aldina Barral
- Centro de Pesquisas Goncalo Moniz–FIOCRUZ, Salvador, Bahia, Brazil
| | - Shaden Kamhawi
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Jesus G. Valenzuela
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
- * E-mail:
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Calvo E, Sanchez-Vargas I, Favreau AJ, Barbian KD, Pham VM, Olson KE, Ribeiro JM. An insight into the sialotranscriptome of the West Nile mosquito vector, Culex tarsalis. BMC Genomics 2010; 11:51. [PMID: 20089177 PMCID: PMC2823692 DOI: 10.1186/1471-2164-11-51] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Accepted: 01/20/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Saliva of adult female mosquitoes help sugar and blood feeding by providing enzymes and polypeptides that help sugar digestion, control microbial growth and counteract their vertebrate host hemostasis and inflammation. Mosquito saliva also potentiates the transmission of vector borne pathogens, including arboviruses. Culex tarsalis is a bird feeding mosquito vector of West Nile Virus closely related to C. quinquefasciatus, a mosquito relatively recently adapted to feed on humans, and the only mosquito of the genus Culex to have its sialotranscriptome so far described. RESULTS A total of 1,753 clones randomly selected from an adult female C. tarsalis salivary glands (SG) cDNA library were sequenced and used to assemble a database that yielded 809 clusters of related sequences, 675 of which were singletons. Primer extension experiments were performed in selected clones to further extend sequence coverage, allowing for the identification of 283 protein sequences, 80 of which code for putative secreted proteins. CONCLUSION Comparison of the C. tarsalis sialotranscriptome with that of C. quinquefasciatus reveals accelerated evolution of salivary proteins as compared to housekeeping proteins. The average amino acid identity among salivary proteins is 70.1%, while that for housekeeping proteins is 91.2% (P < 0.05), and the codon volatility of secreted proteins is significantly higher than those of housekeeping proteins. Several protein families previously found exclusive of mosquitoes, including only in the Aedes genus have been identified in C. tarsalis. Interestingly, a protein family so far unique to C. quinquefasciatus, with 30 genes, is also found in C. tarsalis, indicating it was not a specific C. quinquefasciatus acquisition in its evolution to optimize mammal blood feeding.
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Affiliation(s)
- Eric Calvo
- Section of Vector Biology, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852, USA
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Taranushenko Y, Vinokurov KS, Kludkiewicz B, Kodrík D, Sehnal F. Peptidase inhibitors from the salivary glands of the cockroach Nauphoeta cinerea. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2009; 39:920-930. [PMID: 19931392 DOI: 10.1016/j.ibmb.2009.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 11/08/2009] [Accepted: 11/11/2009] [Indexed: 05/28/2023]
Abstract
Inhibitory activity against subtilisin, proteinase K, chymotrypsin and trypsin was detected in the salivary glands and saliva of the cockroach Nauphoeta cinerea (Blattoptera: Blaberidae). Fractionation of the salivary glands extract by affinity chromatography followed by reverse-phase HPLC yielded five subtilisin-inhibiting peptides with molecular masses ranging from 5 to 14 kDa. N-terminal sequences and subsequently full-length cDNAs of inhibitors designated NcPIa and NcPIb were obtained. The NcPIa cDNA contains 216 nucleotides and encodes a pre-peptide of 72 amino-acid residues of which 19 make up the signal peptide. The cDNA of NcPIb consists of 240 nucleotides and yields a putative secretory peptide of 80 amino-acid residues. Mature NcPIa (5906.6 Da, 53 residues) and NcPIb (6713.3 Da, 60 residues) are structurally similar (65.4% amino acid overlap) single-domain Kazal-type peptidase inhibitors. NcPIa with Arg in P1 position and typical Kazal motif VCGSD interacted stoichiometrically (1:1) with subtilisin and was slightly less active against proteinase K. NcPIb with Leu in P1 and modified Kazal motif ICGSD had similar activity on subtilisin and no on proteinase K but was active on chymotrypsin.
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Affiliation(s)
- Yuliya Taranushenko
- Biology Centre ASCR, Institute of Entomology, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic.
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Serazin AC, Dana AN, Hillenmeyer ME, Lobo NF, Coulibaly MB, Willard MB, Harker BW, Sharakhov IV, Collins FH, Ribeiro JMC, Besansky NJ. Comparative analysis of the global transcriptome of Anopheles funestus from Mali, West Africa. PLoS One 2009; 4:e7976. [PMID: 19936243 PMCID: PMC2775680 DOI: 10.1371/journal.pone.0007976] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Accepted: 10/27/2009] [Indexed: 11/18/2022] Open
Abstract
Background Anopheles funestus is a principal vector of malaria across much of tropical Africa and is considered one of the most efficient of its kind, yet studies of this species have lagged behind those of its broadly sympatric congener, An. gambiae. In aid of future genomic sequencing of An. funestus, we explored the whole body transcriptome, derived from mixed stage progeny of wild-caught females from Mali, West Africa. Principal Findings Here we report the functional annotation and comparative genomics of 2,005 expressed sequence tags (ESTs) from An. funestus, which were assembled with a previous EST set from adult female salivary glands from the same mosquito. The assembled ESTs provided for a nonredundant catalog of 1,035 transcripts excluding mitochondrial sequences. Conclusions/Significance Comparison of the An. funestus and An. gambiae transcriptomes using computational and macroarray approaches revealed a high degree of sequence identity despite an estimated 20–80 MY divergence time between lineages. A phylogenetically broader comparative genomic analysis indicated that the most rapidly evolving proteins– those involved in immunity, hematophagy, formation of extracellular structures, and hypothetical conserved proteins– are those that probably play important roles in how mosquitoes adapt to their nutritional and external environments, and therefore could be of greatest interest in disease control.
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Affiliation(s)
- Andrew C. Serazin
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Ali N. Dana
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Maureen E. Hillenmeyer
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Neil F. Lobo
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Mamadou B. Coulibaly
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
- Malaria Research and Training Center, Bamako, Mali
| | - Michael B. Willard
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Brent W. Harker
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Igor V. Sharakhov
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Frank H. Collins
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Jose M. C. Ribeiro
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail: (NB); (JR)
| | - Nora J. Besansky
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
- * E-mail: (NB); (JR)
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Lombardo F, Ronca R, Rizzo C, Mestres-Simòn M, Lanfrancotti A, Currà C, Fiorentino G, Bourgouin C, Ribeiro JM, Petrarca V, Ponzi M, Coluzzi M, Arcà B. The Anopheles gambiae salivary protein gSG6: an anopheline-specific protein with a blood-feeding role. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2009; 39:457-66. [PMID: 19442731 PMCID: PMC3740408 DOI: 10.1016/j.ibmb.2009.04.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 04/23/2009] [Accepted: 04/27/2009] [Indexed: 05/25/2023]
Abstract
The Anopheles gambiae salivary gland protein 6 (gSG6) is a small protein specifically found in the salivary glands of adult female mosquitoes. We report here the expression of a recombinant form of the protein and we show that in vivo gSG6 is expressed in distal-lateral lobes and is secreted with the saliva while the female mosquito probes for feeding. Injection of gSG6 dsRNA into adult A. gambiae females results in decreased gSG6 protein levels, increased probing time and reduced blood feeding ability. gSG6 orthologs have been found so far only in the salivary glands of Anopheles stephensi and Anopheles funestus, both members of the Cellia subgenus. We report here the gSG6 sequence from five additional anophelines, four species of the A. gambiae complex and Anopheles freeborni, a member of the subgenus Anopheles. We conclude that gSG6 plays some essential blood feeding role and was recruited in the anopheline subfamily most probably after the separation of the lineage which gave origin to Cellia and Anopheles subgenera.
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Affiliation(s)
- Fabrizio Lombardo
- Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Raffaele Ronca
- Dipartimento di Biologia Strutturale e Funzionale, Università “Federico II” - Via Cinthia, 80126 Napoli, Italy
| | - Cinzia Rizzo
- Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Montserrat Mestres-Simòn
- Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Alessandra Lanfrancotti
- Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Chiara Currà
- Dipartimento di Malattie Infettive, Parassitarie ed Immunomediate Istituto superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
| | - Gabriella Fiorentino
- Dipartimento di Biologia Strutturale e Funzionale, Università “Federico II” - Via Cinthia, 80126 Napoli, Italy
| | - Catherine Bourgouin
- Institut Pasteur, Centre de Production et d’Infection des Anophèles, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - Josè M.C. Ribeiro
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Twinbrook III, 12735 Twinbrook Parkway, National Institute of Health, Rockville, MD 20852, USA
| | - Vincenzo Petrarca
- Dipartimento di Genetica e Biologia Moleculare, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Marta Ponzi
- Dipartimento di Malattie Infettive, Parassitarie ed Immunomediate Istituto superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
| | - Mario Coluzzi
- Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Bruno Arcà
- Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, Università “La Sapienza” - Piazzale Aldo Moro 5, 00185 Roma, Italy
- Dipartimento di Biologia Strutturale e Funzionale, Università “Federico II” - Via Cinthia, 80126 Napoli, Italy
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Dubrulle M, Mousson L, Moutailler S, Vazeille M, Failloux AB. Chikungunya virus and Aedes mosquitoes: saliva is infectious as soon as two days after oral infection. PLoS One 2009; 4:e5895. [PMID: 19521520 PMCID: PMC2690823 DOI: 10.1371/journal.pone.0005895] [Citation(s) in RCA: 244] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 05/15/2009] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Aedes aegypti and Aedes albopictus are potential vectors of chikungunya virus (CHIKV). The recent CHIKV outbreaks were caused by a new variant characterized by a mutation in the E1 glycoprotein gene (E1-226V) which has favored a better transmissibility by Ae. albopictus. As Ae. albopictus tends to replace Ae. aegypti in many regions, one question remained: is Ae. albopictus as efficient as Ae. aegypti to transmit the variant E1-226V of CHIKV? METHODOLOGY AND FINDINGS We infected orally both species with the variant E1-226V and estimated the infection, the viral dissemination, and the transmission rate by real time RT-PCR. Additionally, we used an in vitro assay to determine the amount of virus delivered by mosquitoes in their saliva. We found that Ae. aegypti as well as Ae. albopictus ensured a high replication of the virus which underwent an efficient dissemination as detectable in the salivary glands at day 2 post-infection (pi). Infectious CHIKV particles were delivered by salivary glands from day 2 with a maximum at day 6 pi for Ae. albopictus (10(3.3) PFU) and day 7 pi for Ae. aegypti (10(2.5) PFU). CONCLUSIONS Ae. albopictus is slightly more efficient than Ae. aegypti to transmit the variant E1-226V of CHIKV. These results will help to design an efficient vector control to limit transmission as soon as the first human cases are diagnosed.
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Affiliation(s)
- Mathieu Dubrulle
- Institut Pasteur, Génétique moléculaire des Bunyavirus, Paris, France
| | - Laurence Mousson
- Institut Pasteur, Génétique moléculaire des Bunyavirus, Paris, France
| | - Sara Moutailler
- Institut Pasteur, Génétique moléculaire des Bunyavirus, Paris, France
| | - Marie Vazeille
- Institut Pasteur, Génétique moléculaire des Bunyavirus, Paris, France
| | - Anna-Bella Failloux
- Institut Pasteur, Génétique moléculaire des Bunyavirus, Paris, France
- * E-mail:
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