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Alvial IE, Hernández-P R, Suazo MJ, González CR, Véliz D, Benítez HA. Unraveling biotypes of the northern house mosquito, Culex pipiens s.l. (Diptera: Culicidae): molecular differentiation and morphometric analysis. JOURNAL OF INSECT SCIENCE (ONLINE) 2024; 24:7. [PMID: 38340048 PMCID: PMC10858641 DOI: 10.1093/jisesa/ieae006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/12/2023] [Accepted: 01/17/2024] [Indexed: 02/12/2024]
Abstract
Geometric morphometrics was used to determine whether geographic isolation could explain differences in wing size and shape between and within continental (27°S to 41°S) and insular (Rapa Nui) populations of Culex pipiens s.s. Linnaeus and their biotypes (f. pipiens and f. molestus). Molecular protocols based on polymorphisms in the second intron of nuclear locus ace-2 (acetylcholinesterase-2) were used to differentiate Cx. pipiens s.s. from Cx. quinquefasciatus Say, and an assay based on polymorphisms in the flanking region of a microsatellite locus (CQ11) was used to identify biotypes. Culex pipiens f. molestus and hybrids shared larval habitats in all continental sites, while Cx. pipiens f. pipiens was found in 5 of the 10 sites. Only biotype molestus was found in Rapa Nui (Easter Island) Pipiens and molestus biotypes occur sympatrically in aboveground locations, and only molestus was found in the underground site (ME). Biotype molestus was dominant in rural locations and preferably anthropophilic. These results agree with the ecological descriptions previously reported for the biotypes of Cx. pipiens s.s. Procrustes ANOVA only showed differences in centroid size between biotypes in females and males and did not show significant differences in wing shape. However, we found significant differences among the geographic areas in the centroid size and wing shape of both females and males. Particularly, the population of Rapa Nui Island had shorter wings than the continental populations. The results highlight the effects of geographic and environmental processes on morphotypes in vector mosquitoes.
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Affiliation(s)
- Ingrid E Alvial
- Laboratorio de Ecología y Morfometría Evolutiva, Centro de Investigación de Estudios Avanzados del Maule, Universidad Católica del Maule, Talca, Chile
| | - Raquel Hernández-P
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Manuel J Suazo
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile
| | - Christian R González
- Instituto de Entomología, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile
| | - David Véliz
- Departamento de Ciencias Ecológicas, Universidad de Chile, Ñuñoa, Santiago, Chile
- Centro de Ecología y Manejo de Islas Oceánicas (ESMOI), Coquimbo, Chile
| | - Hugo A Benítez
- Laboratorio de Ecología y Morfometría Evolutiva, Centro de Investigación de Estudios Avanzados del Maule, Universidad Católica del Maule, Talca, Chile
- Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS), Universidad Bernardo O’Higgins, Santiago, Chile
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Fritsch H, Pereira FM, Costa EA, Fonseca V, Tosta S, Xavier J, Levy F, de Oliveira C, Menezes G, Lima J, Santos L, Silva L, Nardy V, Astete MKG, Santos BSÁDS, Aguiar NR, Guedes MIMC, de Faria GC, Furtini R, Drumond SRM, Cunha GM, Souza MSPL, de Jesus R, Guimarães SAF, Nuno IC, de Santana ICB, de Sá JEU, Santos GR, Silva WS, Guedes TF, Araújo ELL, Said RFDC, de Albuquerque CFC, Peterka CRL, Romano APM, da Cunha RV, de Filippis AMB, Leal e Silva de Mello A, Giovanetti M, Alcantara LCJ. Retrospective Investigation in Horses with Encephalitis Reveals Unnoticed Circulation of West Nile Virus in Brazil. Viruses 2022; 14:v14071540. [PMID: 35891521 PMCID: PMC9316658 DOI: 10.3390/v14071540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/10/2022] [Accepted: 07/11/2022] [Indexed: 12/10/2022] Open
Abstract
During these past years, several studies have provided serological evidence regarding the circulation of West Nile virus (WNV) in Brazil. Despite some reports, much is still unknown regarding the genomic diversity and transmission dynamics of this virus in the country. Recently, genomic monitoring activities in horses revealed the circulation of WNV in several Brazilian regions. These findings on the paucity of genomic data reinforce the need for prompt investigation of WNV infection in horses, which may precede human cases of encephalitis in Brazil. Thus, in this study, we retrospectively screened 54 suspicious WNV samples collected between 2017 and 2020 from the spinal cord and brain of horses with encephalitis and generated three new WNV genomes from the Ceará and Bahia states, located in the northeastern region of Brazil. The Bayesian reconstruction revealed that at least two independent introduction events occurred in Brazil. The first introduction event appears to be likely related to the North American outbreak, and was estimated to have occurred in March 2013.The second introduction event appears to have occurred in September 2017 and appears to be likely related to the South American outbreak. Together, our results reinforce the importance of increasing the priority of WNV genomic monitoring in equines with encephalitis in order to track the dispersion of this emerging pathogen through the country.
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Affiliation(s)
- Hegger Fritsch
- Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (H.F.); (E.A.C.); (S.T.); (J.X.); (B.S.Á.d.S.S.); (N.R.A.); (M.I.M.C.G.)
| | - Felicidade Mota Pereira
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Erica Azevedo Costa
- Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (H.F.); (E.A.C.); (S.T.); (J.X.); (B.S.Á.d.S.S.); (N.R.A.); (M.I.M.C.G.)
| | - Vagner Fonseca
- Organização Pan-Americana de Saúde/Organização Mundial de Saúde, Brasilia 37650-000, Brazil; (V.F.); (R.F.d.C.S.); (C.F.C.d.A.)
| | - Stephane Tosta
- Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (H.F.); (E.A.C.); (S.T.); (J.X.); (B.S.Á.d.S.S.); (N.R.A.); (M.I.M.C.G.)
| | - Joilson Xavier
- Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (H.F.); (E.A.C.); (S.T.); (J.X.); (B.S.Á.d.S.S.); (N.R.A.); (M.I.M.C.G.)
| | - Flavia Levy
- Laboratorio de Flavivirus, lnstituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (F.L.); (C.d.O.); (A.M.B.d.F.)
| | - Carla de Oliveira
- Laboratorio de Flavivirus, lnstituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (F.L.); (C.d.O.); (A.M.B.d.F.)
| | - Gabriela Menezes
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Jaqueline Lima
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Lenisa Santos
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Luciana Silva
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Vanessa Nardy
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Marcela Kelly Gómez Astete
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | | | - Nágila Rocha Aguiar
- Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (H.F.); (E.A.C.); (S.T.); (J.X.); (B.S.Á.d.S.S.); (N.R.A.); (M.I.M.C.G.)
| | - Maria Isabel Maldonado Coelho Guedes
- Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (H.F.); (E.A.C.); (S.T.); (J.X.); (B.S.Á.d.S.S.); (N.R.A.); (M.I.M.C.G.)
| | - Guilherme Canhestro de Faria
- Laboratório de Saúde Animal, Instituto Mineiro de Agropecuária, Belo Horizonte 30110-005, Brazil; (G.C.d.F.); (R.F.); (S.R.M.D.)
| | - Ronaldo Furtini
- Laboratório de Saúde Animal, Instituto Mineiro de Agropecuária, Belo Horizonte 30110-005, Brazil; (G.C.d.F.); (R.F.); (S.R.M.D.)
| | - Safira Rachel Milanez Drumond
- Laboratório de Saúde Animal, Instituto Mineiro de Agropecuária, Belo Horizonte 30110-005, Brazil; (G.C.d.F.); (R.F.); (S.R.M.D.)
| | - Gabriel Muricy Cunha
- Secretary of Health of the State of Bahia (SESAB), Salvador 40301-110, Brazil; (G.M.C.); (M.S.P.L.S.)
| | | | - Ronaldo de Jesus
- Coordenação Geral dos Laboratórios de Saúde Pública, Secretaria de Vigilância em Saúde-Brazil, Brasília 70719-040, Brazil; (R.d.J.); (T.F.G.); (E.L.L.A.)
| | - Sara A. Franco Guimarães
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Italo Coelho Nuno
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Ian Carlos Brito de Santana
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - José Eduardo Ungar de Sá
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - George Roma Santos
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Willadesmon Santos Silva
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
| | - Thiago Ferreira Guedes
- Coordenação Geral dos Laboratórios de Saúde Pública, Secretaria de Vigilância em Saúde-Brazil, Brasília 70719-040, Brazil; (R.d.J.); (T.F.G.); (E.L.L.A.)
| | - Emerson Luiz Lima Araújo
- Coordenação Geral dos Laboratórios de Saúde Pública, Secretaria de Vigilância em Saúde-Brazil, Brasília 70719-040, Brazil; (R.d.J.); (T.F.G.); (E.L.L.A.)
| | - Rodrigo Fabiano do Carmo Said
- Organização Pan-Americana de Saúde/Organização Mundial de Saúde, Brasilia 37650-000, Brazil; (V.F.); (R.F.d.C.S.); (C.F.C.d.A.)
| | | | - Cassio Roberto Leonel Peterka
- Coordenação Geral das Arboviroses, Secretaria de Vigilância em Saúde (CGARB/SVS-MS), Brasilia 37650-000, Brazil; (C.R.L.P.); (A.P.M.R.)
| | - Alessandro Pecego Martins Romano
- Coordenação Geral das Arboviroses, Secretaria de Vigilância em Saúde (CGARB/SVS-MS), Brasilia 37650-000, Brazil; (C.R.L.P.); (A.P.M.R.)
| | | | - Ana Maria Bispo de Filippis
- Laboratorio de Flavivirus, lnstituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (F.L.); (C.d.O.); (A.M.B.d.F.)
| | - Arabela Leal e Silva de Mello
- Laboratório Central de Saúde Pública Prof Goncalo Moniz, Salvador 41745-900, Brazil; (F.M.P.); (G.M.); (J.L.); (L.S.); (L.S.); (V.N.); (M.K.G.A.); (S.A.F.G.); (I.C.N.); (I.C.B.d.S.); (J.E.U.d.S.); (G.R.S.); (W.S.S.)
- Correspondence: (A.L.e.S.d.M.); (M.G.); (L.C.J.A.)
| | - Marta Giovanetti
- Laboratorio de Flavivirus, lnstituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (F.L.); (C.d.O.); (A.M.B.d.F.)
- Department of Science and Technology for Humans and the Environment, University of Campus Bio-Medico, 00128 Rome, Italy
- Correspondence: (A.L.e.S.d.M.); (M.G.); (L.C.J.A.)
| | - Luiz Carlos Junior Alcantara
- Laboratorio de Flavivirus, lnstituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (F.L.); (C.d.O.); (A.M.B.d.F.)
- Correspondence: (A.L.e.S.d.M.); (M.G.); (L.C.J.A.)
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Lorenz C, Chiaravalloti-Neto F. Why are there no human West Nile virus outbreaks in South America? LANCET REGIONAL HEALTH. AMERICAS 2022; 12:100276. [PMID: 36776433 PMCID: PMC9903813 DOI: 10.1016/j.lana.2022.100276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Camila Lorenz
- Corresponding author at: Department of Epidemiology, School of Public Health - FSP, University of Sao Paulo - USP, Av. Dr. Arnaldo, 715, São Paulo, SP, Brazil.
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Costa ÉA, Giovanetti M, Silva Catenacci L, Fonseca V, Aburjaile FF, Chalhoub FLL, Xavier J, Campos de Melo Iani F, da Cunha e Silva Vieira MA, Freitas Henriques D, Medeiros DBDA, Guedes MIMC, Senra Álvares da Silva Santos B, Gonçalves Silva AS, de Pino Albuquerque Maranhão R, da Costa Faria NR, Farinelli de Siqueira R, de Oliveira T, Ribeiro Leite Jardim Cavalcante K, Oliveira de Moura NF, Pecego Martins Romano A, Campelo de Albuquerque CF, Soares Feitosa LC, Martins Bayeux JJ, Bertoni Cavalcanti Teixeira R, Lisboa Lobato O, da Costa Silva S, Bispo de Filippis AM, Venâncio da Cunha R, Lourenço J, Alcantara LCJ. West Nile Virus in Brazil. Pathogens 2021; 10:896. [PMID: 34358046 PMCID: PMC8308589 DOI: 10.3390/pathogens10070896] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 01/04/2023] Open
Abstract
Background: West Nile virus (WNV) was first sequenced in Brazil in 2019, when it was isolated from a horse in the Espírito Santo state. Despite multiple studies reporting serological evidence suggestive of past circulation since 2004, WNV remains a low priority for surveillance and public health, such that much is still unknown about its genomic diversity, evolution, and transmission in the country. Methods: A combination of diagnostic assays, nanopore sequencing, phylogenetic inference, and epidemiological modeling are here used to provide a holistic overview of what is known about WNV in Brazil. Results: We report new genetic evidence of WNV circulation in southern (Minas Gerais, São Paulo) and northeastern (Piauí) states isolated from equine red blood cells. A novel, climate-informed theoretical perspective of the potential transmission of WNV across the country highlights the state of Piauí as particularly relevant for WNV epidemiology in Brazil, although it does not reject possible circulation in other states. Conclusion: Our output demonstrates the scarceness of existing data, and that although there is sufficient evidence for the circulation and persistence of the virus, much is still unknown on its local evolution, epidemiology, and activity. We advocate for a shift to active surveillance, to ensure adequate preparedness for future epidemics with spill-over potential to humans.
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Affiliation(s)
- Érica Azevedo Costa
- Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (É.A.C.); (M.I.M.C.G.); (B.S.Á.d.S.S.); (A.S.G.S.)
| | - Marta Giovanetti
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (M.G.); (F.L.L.C.); (N.R.d.C.F.); (A.M.B.d.F.)
- Laboratório de Genética Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (V.F.); (F.F.A.); (J.X.)
| | - Lilian Silva Catenacci
- Departamento De Morfofisiologia Veterinária, Universidade Federal do Piauí, Teresina 64049-550, Brazil;
| | - Vagner Fonseca
- Laboratório de Genética Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (V.F.); (F.F.A.); (J.X.)
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa;
- Coordenação Geral dos Laboratórios de Saúde Pública/Secretaria de Vigilância em Saúde, Ministério da Saúde (CGLAB/SVS-MS), Brasília 70719-040, Brazil
| | - Flávia Figueira Aburjaile
- Laboratório de Genética Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (V.F.); (F.F.A.); (J.X.)
| | - Flávia L. L. Chalhoub
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (M.G.); (F.L.L.C.); (N.R.d.C.F.); (A.M.B.d.F.)
| | - Joilson Xavier
- Laboratório de Genética Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (V.F.); (F.F.A.); (J.X.)
| | | | | | - Danielle Freitas Henriques
- Seção de Arbovirologia e Febres Hemorrágicas, Instituto Evandro Chagas, Ministério da Saúde, Ananindeua 70058-900, Brazil; (D.F.H.); (D.B.d.A.M.)
| | - Daniele Barbosa de Almeida Medeiros
- Seção de Arbovirologia e Febres Hemorrágicas, Instituto Evandro Chagas, Ministério da Saúde, Ananindeua 70058-900, Brazil; (D.F.H.); (D.B.d.A.M.)
| | - Maria Isabel Maldonado Coelho Guedes
- Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (É.A.C.); (M.I.M.C.G.); (B.S.Á.d.S.S.); (A.S.G.S.)
| | - Beatriz Senra Álvares da Silva Santos
- Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (É.A.C.); (M.I.M.C.G.); (B.S.Á.d.S.S.); (A.S.G.S.)
| | - Aila Solimar Gonçalves Silva
- Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (É.A.C.); (M.I.M.C.G.); (B.S.Á.d.S.S.); (A.S.G.S.)
| | - Renata de Pino Albuquerque Maranhão
- Setor de Clínica de Equinos, Hospital Veterinário, Campus Pampulha, Universidade Federal de Minas Gerais Escola de Veterinária, Belo Horizonte 31270-901, Brazil;
| | - Nieli Rodrigues da Costa Faria
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (M.G.); (F.L.L.C.); (N.R.d.C.F.); (A.M.B.d.F.)
| | | | - Tulio de Oliveira
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa;
| | - Karina Ribeiro Leite Jardim Cavalcante
- Coordenacao Geral das Arboviroses, Secretaria de Vigilância em Saúde/Ministério da Saúde, Brasília 70058-900, Brazil; (K.R.L.J.C.); (N.F.O.d.M.); (A.P.M.R.)
| | - Noely Fabiana Oliveira de Moura
- Coordenacao Geral das Arboviroses, Secretaria de Vigilância em Saúde/Ministério da Saúde, Brasília 70058-900, Brazil; (K.R.L.J.C.); (N.F.O.d.M.); (A.P.M.R.)
| | - Alessandro Pecego Martins Romano
- Coordenacao Geral das Arboviroses, Secretaria de Vigilância em Saúde/Ministério da Saúde, Brasília 70058-900, Brazil; (K.R.L.J.C.); (N.F.O.d.M.); (A.P.M.R.)
| | | | - Lauro César Soares Feitosa
- Centro de Ciências Agrárias, Departamento de Clínica e Cirurgia Veterinária, Universidade Federal do Piauí, Teresina 64049-550, Brazil;
| | - José Joffre Martins Bayeux
- Faculdade de Ciências da Saúde, Medicina Veterinária, Urbanova, São José Dos Campos, UNIVAP-Universidade Vale do Paraíba, São Paulo 12245-720, Brazil;
| | | | - Osmaikon Lisboa Lobato
- Laboratório de Genética e Conservação de Germoplasma, Campus Prof. Cinobelina Elvas, Universidade Federal do Piauí, Bom Jesus, Piauí 64049-550, Brazil; (O.L.L.); (S.d.C.S.)
| | - Silvokleio da Costa Silva
- Laboratório de Genética e Conservação de Germoplasma, Campus Prof. Cinobelina Elvas, Universidade Federal do Piauí, Bom Jesus, Piauí 64049-550, Brazil; (O.L.L.); (S.d.C.S.)
| | - Ana Maria Bispo de Filippis
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (M.G.); (F.L.L.C.); (N.R.d.C.F.); (A.M.B.d.F.)
| | - Rivaldo Venâncio da Cunha
- Coordenacao dos Laboratorios de Referencia, Oswaldo Cruz Foundation, Rio de Janeiro 21040-360, Brazil;
| | - José Lourenço
- Department of Zoology, University of Oxford, Oxford OX1 3PS, UK;
| | - Luiz Carlos Junior Alcantara
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (M.G.); (F.L.L.C.); (N.R.d.C.F.); (A.M.B.d.F.)
- Laboratório de Genética Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (V.F.); (F.F.A.); (J.X.)
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5
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Zhang JF, Wei B, Cha SY, Shang K, Jang HK, Kang M. The use of embryonic chicken eggs as an alternative model to evaluate the virulence of Salmonella enterica serovar Gallinarum. PLoS One 2020; 15:e0238630. [PMID: 32911523 PMCID: PMC7500061 DOI: 10.1371/journal.pone.0238630] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 08/19/2020] [Indexed: 11/25/2022] Open
Abstract
Salmonella enterica serovar Gallinarum (S.
Gallinarum) can cause fowl typhoid, a severe systemic disease responsible for
considerable economic losses. Chicken pathogenicity test is the traditional
method for assessing the virulence of S. Gallinarum. However,
this method is limited by several factors, including ethical considerations,
costs, and the need for specialized facilities. Hence, we established a chicken
embryo lethality assay (ELA) model to determine the virulence of
S. Gallinarum. Three virulent and three avirulent
representative strains, which were confirmed by the chicken pathogenicity test,
were used to perform the ELA. The most significant difference between the
virulent and avirulent strains could be observed when 13-day-old embryos were
inoculated via the AC route and incubated for 5 days. Based on a 50% embryo
lethal dose (ELD50), isolates considered to be virulent had a
Log10ELD50 of ≤ 4.0, moderately virulent strains had a
Log10ELD50 of 4.0−6.1, and avirulent isolates had a
Log10ELD50 of ≥ 6.1. Different abilities to invade the
liver of embryos were found between the virulent and avirulent strains by a
growth curve experiment in vitro. The maximum colony-forming
units (CFU) of the virulent strain was about 10,000 times higher than that of
the avirulent strain in the liver at 5 days post infection. The ELA results of
42 field strains showed that thirty-two strains (76.2%) were virulent, nine were
moderately virulent (21.4%), and one strain was avirulent (2.4%). In conclusion,
these results suggest that the ELA can be used as an alternative method to
assess the virulence of S. Gallinarum, which will contribute to
the study of virulence genes, virulence evolution, pathogenic mechanisms and
vaccine development.
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Affiliation(s)
- Jun-feng Zhang
- Department of Veterinary Infectious Diseases and Avian Diseases, College
of Veterinary Medicine and Center for Poultry Diseases Control, Jeonbuk National
University, Iksan, South Korea
| | - Bai Wei
- Department of Veterinary Infectious Diseases and Avian Diseases, College
of Veterinary Medicine and Center for Poultry Diseases Control, Jeonbuk National
University, Iksan, South Korea
| | - Se-Yeoun Cha
- Department of Veterinary Infectious Diseases and Avian Diseases, College
of Veterinary Medicine and Center for Poultry Diseases Control, Jeonbuk National
University, Iksan, South Korea
| | - Ke Shang
- Department of Veterinary Infectious Diseases and Avian Diseases, College
of Veterinary Medicine and Center for Poultry Diseases Control, Jeonbuk National
University, Iksan, South Korea
| | - Hyung-Kwan Jang
- Department of Veterinary Infectious Diseases and Avian Diseases, College
of Veterinary Medicine and Center for Poultry Diseases Control, Jeonbuk National
University, Iksan, South Korea
- Bio Disease Control(BIOD) Co., Ltd., Iksan, Republic of
Korea
- * E-mail: (MK); (HKJ)
| | - Min Kang
- Department of Veterinary Infectious Diseases and Avian Diseases, College
of Veterinary Medicine and Center for Poultry Diseases Control, Jeonbuk National
University, Iksan, South Korea
- Bio Disease Control(BIOD) Co., Ltd., Iksan, Republic of
Korea
- * E-mail: (MK); (HKJ)
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6
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Benzarti E, Rivas J, Sarlet M, Franssen M, Moula N, Savini G, Lorusso A, Desmecht D, Garigliany MM. Usutu Virus Infection of Embryonated Chicken Eggs and a Chicken Embryo-Derived Primary Cell Line. Viruses 2020; 12:v12050531. [PMID: 32408481 PMCID: PMC7291025 DOI: 10.3390/v12050531] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/28/2020] [Accepted: 05/08/2020] [Indexed: 12/28/2022] Open
Abstract
Usutu virus (USUV) is a mosquito-borne flavivirus, closely related to the West Nile virus (WNV). Similar to WNV, USUV may cause infections in humans, with occasional, but sometimes severe, neurological complications. Further, USUV can be highly pathogenic in wild and captive birds and its circulation in Europe has given rise to substantial avian death. Adequate study models of this virus are still lacking but are critically needed to understand its pathogenesis and virulence spectrum. The chicken embryo is a low-cost, easy-to-manipulate and ethically acceptable model that closely reflects mammalian fetal development and allows immune response investigations, drug screening, and high-throughput virus production for vaccine development. While former studies suggested that this model was refractory to USUV infection, we unexpectedly found that high doses of four phylogenetically distinct USUV strains caused embryonic lethality. By employing immunohistochemistry and quantitative reverse transcriptase-polymerase chain reaction, we demonstrated that USUV was widely distributed in embryonic tissues, including the brain, retina, and feather follicles. We then successfully developed a primary cell line from the chorioallantoic membrane that was permissive to the virus without the need for viral adaptation. We believe the future use of these models would foster a significant understanding of USUV-induced neuropathogenesis and immune response and allow the future development of drugs and vaccines against USUV.
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Affiliation(s)
- Emna Benzarti
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
| | - José Rivas
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
| | - Michaël Sarlet
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
| | - Mathieu Franssen
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
| | - Nassim Moula
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
| | - Giovanni Savini
- OIE Reference Centre for West Nile Disease, Istituto Zooprofilattico Sperimentale “G. Caporale”, 46100 Teramo, Italy; (G.S.); (A.L.)
| | - Alessio Lorusso
- OIE Reference Centre for West Nile Disease, Istituto Zooprofilattico Sperimentale “G. Caporale”, 46100 Teramo, Italy; (G.S.); (A.L.)
| | - Daniel Desmecht
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
| | - Mutien-Marie Garigliany
- Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège, Sart Tilman B43, B-4000 Liège, Belgium; (E.B.); (J.R.); (M.S.); (M.F.); (N.M.); (D.D.)
- Correspondence:
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7
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Hadfield J, Brito AF, Swetnam DM, Vogels CBF, Tokarz RE, Andersen KG, Smith RC, Bedford T, Grubaugh ND. Twenty years of West Nile virus spread and evolution in the Americas visualized by Nextstrain. PLoS Pathog 2019; 15:e1008042. [PMID: 31671157 PMCID: PMC6822705 DOI: 10.1371/journal.ppat.1008042] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
It has been 20 years since West Nile virus first emerged in the Americas, and since then, little progress has been made to control outbreaks caused by this virus. After its first detection in New York in 1999, West Nile virus quickly spread across the continent, causing an epidemic of human disease and massive bird die-offs. Now the virus has become endemic to the United States, where an estimated 7 million human infections have occurred, making it the leading mosquito-borne virus infection and the most common cause of viral encephalitis in the country. To bring new attention to one of the most important mosquito-borne viruses in the Americas, we provide an interactive review using Nextstrain: a visualization tool for real-time tracking of pathogen evolution (nextstrain.org/WNV/NA). Nextstrain utilizes a growing database of more than 2,000 West Nile virus genomes and harnesses the power of phylogenetics for students, educators, public health workers, and researchers to visualize key aspects of virus spread and evolution. Using Nextstrain, we use virus genomics to investigate the emergence of West Nile virus in the U S, followed by its rapid spread, evolution in a new environment, establishment of endemic transmission, and subsequent international spread. For each figure, we include a link to Nextstrain to allow the readers to directly interact with and explore the underlying data in new ways. We also provide a brief online narrative that parallels this review to further explain the data and highlight key epidemiological and evolutionary features (nextstrain.org/narratives/twenty-years-of-WNV). Mirroring the dynamic nature of outbreaks, the Nextstrain links provided within this paper are constantly updated as new West Nile virus genomes are shared publicly, helping to stay current with the research. Overall, our review showcases how genomics can track West Nile virus spread and evolution, as well as potentially uncover novel targeted control measures to help alleviate its public health burden.
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Affiliation(s)
- James Hadfield
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Anderson F. Brito
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
| | - Daniele M. Swetnam
- Department of Pathology, Microbiology and Immunology, University of California, Davis, Davis, California, United States of America
| | - Chantal B. F. Vogels
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
| | - Ryan E. Tokarz
- Department of Entomology, Iowa State University, Ames, Iowa, United States of America
| | - Kristian G. Andersen
- Department of Immunology and Microbiology, Scripps Research, La Jolla, California, United States of America
- Scripps Research Translational Institute, La Jolla, California, United States of America
| | - Ryan C. Smith
- Department of Entomology, Iowa State University, Ames, Iowa, United States of America
| | - Trevor Bedford
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Nathan D. Grubaugh
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
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8
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Martins LC, Silva EVPD, Casseb LMN, Silva SPD, Cruz ACR, Pantoja JADS, Medeiros DBDA, Martins Filho AJ, Cruz EDRMD, Araújo MTFD, Cardoso JF, Cunha MACRD, Almada GL, Romano APM, Santos MGDP, Rodrigues GAP, Chiang JO, Quaresma JAS, Carvalho VL, Vasconcelos PFDC. First isolation of West Nile virus in Brazil. Mem Inst Oswaldo Cruz 2019; 114:e180332. [PMID: 30672980 PMCID: PMC6343470 DOI: 10.1590/0074-02760180332] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 12/27/2018] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Serological evidence of West Nile virus (WNV) infection has been reported in different regions of Brazil from equine and human hosts but the virus had never been isolated in the country. OBJECTIVES We sought to identify the viral etiology of equine encephalitis in Espírito Santo state. METHODS We performed viral culture in C6/36 cells, molecular detection of WNV genome, histopathology and immunohistochemistry from horse cerebral tissue. We also carried out sequencing, phylogenetic analysis and molecular clock. FINDINGS Histopathologic analysis from horse cerebral tissue showed injury related to encephalitis and WNV infection was confirmed by immunohistochemistry. The virus was detected by reverse transcription quantitative polymerase chain reaction (RT-qPCR) from brain tissue and subsequently isolated in C6/36 cells. WNV full-length genome was sequenced showing the isolated strain belongs to lineage 1a. The molecular clock indicated that Brazilian WNV strain share the same common ancestor that were circulating in US during 2002-2005. MAIN CONCLUSIONS Here we report the first isolation of WNV in Brazil from a horse with neurologic disease, which was clustered into lineage 1a with others US WNV strains isolated in beginning of 2000’s decade.
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Affiliation(s)
- Lívia Caricio Martins
- Instituto Evandro Chagas, Seção de Arbovirologia e Febres Hemorrágicas, Ananindeua, PA, Brasil
| | | | | | - Sandro Patroca da Silva
- Instituto Evandro Chagas, Seção de Arbovirologia e Febres Hemorrágicas, Ananindeua, PA, Brasil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Valéria Lima Carvalho
- Instituto Evandro Chagas, Seção de Arbovirologia e Febres Hemorrágicas, Ananindeua, PA, Brasil
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9
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Marcondes CB, Contigiani M, Gleiser RM. Emergent and Reemergent Arboviruses in South America and the Caribbean: Why So Many and Why Now? JOURNAL OF MEDICAL ENTOMOLOGY 2017; 54:509-532. [PMID: 28399216 DOI: 10.1093/jme/tjw209] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 10/20/2016] [Indexed: 06/07/2023]
Abstract
Varios arbovirus han emergido y/o reemergido en el Nuevo Mundo en las últimas décadas. Los virus Zika y chikungunya, anteriormente restringidos a África y quizás Asia, invadieron el continente, causando gran preocupación; además siguen ocurriendo brotes causados por el virus dengue en casi todos los países, con millones de casos por año. El virus West Nile invadió rápidamente América del Norte, y ya se han encontrado casos en América Central y del Sur. Otros arbovirus, como Mayaro y el virus de la encefalitis equina del este han aumentado su actividad y se han encontrado en nuevas regiones. Se han documentado cambios en la patogenicidad de algunos virus que conducen a enfermedades inesperadas. Una fauna diversa de mosquitos, cambios climáticos y en la vegetación, aumento de los viajes, y urbanizaciones no planificadas que generan condiciones adecuadas para la proliferación de Aedes aegypti (L.), Culex quinquefasciatus Say y otros mosquitos vectores, se han combinado para influir fuertemente en los cambios en la distribución y la incidencia de varios arbovirus. Se enfatiza la necesidad de realizar estudios exhaustivos de la fauna de mosquitos y modificaciones de las condiciones ambientales, sobre todo en las zonas urbanas fuertemente influenciadas por factores sociales, políticos y económicos.
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Affiliation(s)
- Carlos Brisola Marcondes
- Departamento de Microbiologia, Imunologia e Parasitologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Marta Contigiani
- Emeritus Professor, Instituto de Virologia "Dr. J. M. Vanella", Enfermera Gordillo Gomez s/n, Ciudad Universitaria, National University of Córdoba, Córdoba, Argentina
| | - Raquel Miranda Gleiser
- Centro de Relevamiento y Evaluación de Recursos Agrícolas y Naturales (CREAN) - Instituto Multidisciplinario de Biología Vegetal (IMBIV), Universidad Nacional de Córdoba (UNC) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
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10
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Hoyos-López R, Suaza-Vasco J, Rúa-Uribe G, Uribe S, Gallego-Gómez JC. Molecular detection of flaviviruses and alphaviruses in mosquitoes (Diptera: Culicidae) from coastal ecosystems in the Colombian Caribbean. Mem Inst Oswaldo Cruz 2016; 111:625-634. [PMID: 27706377 PMCID: PMC5066328 DOI: 10.1590/0074-02760160096] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 07/19/2016] [Indexed: 11/21/2022] Open
Abstract
Arboviruses belonging to the genera Flavivirus and Alphavirus were detected in mosquitoes in a rural area of San Bernardo del Viento (Córdoba, Colombia). A total of 22,180 mosquitoes were collected, sorted into 2,102 pools, and tested by generic/nested reverse transcription-polymerase chain reaction. Venezuelan equine encephalitis virus, dengue virus, West Nile virus, St. Louis encephalitis virus, yellow fever virus, and Culex flavivirus were detected and identified by sequencing. The detection of arboviral pathogens in this zone represents possible circulation and indicates a human health risk, demonstrating the importance of virological surveillance activities.
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Affiliation(s)
- Richard Hoyos-López
- Universidad de Antioquia, Translational and Molecular Medicine Group,
Medellín, Antioquia, Colombia
| | - Juan Suaza-Vasco
- Universidad Nacional de Colombia, Grupo de Investigación en Sistemática
Molecular, Medellín, Antioquia, Colombia
| | - Guillermo Rúa-Uribe
- Universidad de Antioquia, Facultad de Medicina, Grupo de Entomología
Médica, Medellín, Antioquia, Colombia
| | - Sandra Uribe
- Universidad Nacional de Colombia, Grupo de Investigación en Sistemática
Molecular, Medellín, Antioquia, Colombia
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11
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Caraballo EV, Hunsperger E, Martínez I. Characterization of Puerto Rican West Nile Virus isolates in mice. Virol J 2015; 12:137. [PMID: 26357867 PMCID: PMC4566862 DOI: 10.1186/s12985-015-0363-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 08/18/2015] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND West Nile virus (WNV) is a neurotropic arbovirus that was first isolated in 1937 in the West Nile District of Uganda. The virus emerged in New York in 1999 and is now endemic in North America (2007). The first virus isolates from Puerto Rico were obtained in 2007 from a chicken (PR20wh) and a mosquito pool (PR423). Our study further characterized these viral isolates using in vitro plaque morphology assays and in vivo using a Balb/c mice pathogenesis model. METHODS AND RESULTS In the in vitro experiments, PR WNV isolates produced significantly smaller plaques in Vero cells compared to the New York 1999 strain (NY99). For the in vivo experiments, PR WNV isolates were propagated in mammalian (Vero) and insect (C6/36) cell lines and then inoculated in Balb/c mice. When WNV was propagated in Vero cells, we observed a trend towards significance in the survival rate with PR20wh compared to NY99 (log rank, p = 0.092). Regardless of whether the viral isolates were propagated in Vero or C6/36 cells, we found a significantly greater survival in mice infected with PR20wh strain, when compared to NY99 (log rank, p = 0.04), while no statistical difference was detected between PR423 and NY99 (p = 0.84). The average survival time (AST) in mice was significantly lower in C6/36-derived PR423 when compared to C6/36-derived NY99 (t-test, p = 0.013), and Vero-derived PR423 (t-test, p < 0.001). Eight days post infection in mice the viral load in brain tissue for Vero-derived PR423 was significantly higher when compared to NY99 and PR20wh. CONCLUSIONS These results suggest that the PR WNV isolate, PR20wh, is a less pathogenic strain in mice than NY99. Moreover, we found that PR423 is a pathogenic isolate that causes faster mortality than NY99, when propagated in C6/36.
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Affiliation(s)
- Elba V Caraballo
- Department of Microbiology and Medical Zoology, University of Puerto Rico, Room A-355 UPR-Medical Sciences Campus, PO Box 365067, San Juan, 00936-5067, Puerto Rico.
| | - Elizabeth Hunsperger
- Centers for Disease Control, Division of Vector Borne Diseases, Dengue Branch San Juan, San Juan, Puerto Rico.
| | - Idalí Martínez
- Department of Microbiology and Medical Zoology, University of Puerto Rico, Room A-355 UPR-Medical Sciences Campus, PO Box 365067, San Juan, 00936-5067, Puerto Rico.
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12
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Using the chicken embryo to assess virulence of Listeria monocytogenes and to model other microbial infections. Nat Protoc 2015; 10:1155-64. [PMID: 26134955 DOI: 10.1038/nprot.2015.073] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Microbial infections are a global health problem, particularly as microbes are continually developing resistance to antimicrobial treatments. An effective and reliable method for testing the virulence of different microbial pathogens is therefore a useful research tool. This protocol describes how the chicken embryo can be used as a trustworthy, inexpensive, ethically desirable and quickly accessible model to assess the virulence of the human bacterial pathogen Listeria monocytogenes, which can also be extended to other microbial pathogens. We provide a step-by-step protocol and figures and videos detailing the method, including egg handling, infection strategies, pathogenicity screening and isolation of infected organs. From the start of incubation of the fertilized eggs, the protocol takes <4 weeks to complete, with the infection part taking only 3 d. We discuss the appropriate controls to use and potential adjustments needed for adapting the protocol for other microbial pathogens.
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13
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López RH, Soto SU, Gallego-Gómez JC. Evolutionary relationships of West Nile virus detected in mosquitoes from a migratory bird zone of Colombian Caribbean. Virol J 2015; 12:80. [PMID: 25989901 PMCID: PMC4445300 DOI: 10.1186/s12985-015-0310-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/13/2015] [Indexed: 11/10/2022] Open
Abstract
Background West Nile virus (WNV) is a member of the genus Flavivirus, and it is transmitted between Culex sp. mosquitoes and avian hosts. Equids and humans are commonly infected with WNV as dead-end hosts, and the signs and symptoms of infection range from mild illness to neurologic symptoms as encephalitis, meningitis and sometimes death. Previous phylogenetic studies have classified WNV into six genetically distinct lineages and provided valuable insight on WNV dispersal patterns within the Americas and its emergence in different geographic areas. In this study, we isolated, sequenced and genetically characterized the NS5 and envelope genes for two WNV strains detected from Northern of Colombia. Herein we describe the evolutionary relationships with representative WNV-strains isolated in a variety of epidemic outbreaks and countries, to define the phylogeographic origin and possible implications in the epidemiology of this emergent virus in Colombia. Findings Fragments of the NS5 and Envelope genes were amplified with RT-PCR and sequenced to obtain 1186-nt and 1504-nt portions, respectively. Our sequences were aligned with 46 sequences from WNV-strains collected in the U.S., Mexico and Argentina for phylogenetic reconstruction using Bayesian methods. Sequence analyses identified unique non-synonymous substitutions in the envelope gene of the WNV strains we detected, and our sequences clustered together with those from the attenuated Texas – 2002 genotype. Conclusions A new strain closely related to attenuated strains collected in Texas during 2002 was identified from Colombia by phylogenetic analysis. This finding may explain the absence of human/equine cases of WNV-encephalitis or severe disease in Colombia and possibly other regions of South America. Follow-up studies are needed in ecosystems used by migratory birds areas and virological/entomological surveillance.
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Affiliation(s)
- Richard Hoyos López
- Molecular and Translational Medicine Group, Medical Research Institute, Faculty of Medicina, Universidad de Antioquia, Medellín, Colombia. .,Molecular Systematics Research Group, Biosciences School - Sciences Faculty, Universidad Nacional de Colombia, Medellín, Colombia.
| | - Sandra Uribe Soto
- Molecular Systematics Research Group, Biosciences School - Sciences Faculty, Universidad Nacional de Colombia, Medellín, Colombia.
| | - Juan Carlos Gallego-Gómez
- Molecular and Translational Medicine Group, Medical Research Institute, Faculty of Medicina, Universidad de Antioquia, Medellín, Colombia.
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14
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The global ecology and epidemiology of West Nile virus. BIOMED RESEARCH INTERNATIONAL 2015; 2015:376230. [PMID: 25866777 PMCID: PMC4383390 DOI: 10.1155/2015/376230] [Citation(s) in RCA: 307] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 08/10/2014] [Indexed: 12/30/2022]
Abstract
Since its initial isolation in Uganda in 1937 through the present, West Nile virus (WNV) has become an important cause of human and animal disease worldwide. WNV, an enveloped virus of the genus Flavivirus, is naturally maintained in an enzootic cycle between birds and mosquitoes, with occasional epizootic spillover causing disease in humans and horses. The mosquito vectors for WNV are widely distributed worldwide, and the known geographic range of WNV transmission and disease has continued to increase over the past 77 years. While most human infections with WNV are asymptomatic, severe neurological disease may develop resulting in long-term sequelae or death. Surveillance and preventive measures are an ongoing need to reduce the public health impact of WNV in areas with the potential for transmission.
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15
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Elizondo-Quiroga D, Elizondo-Quiroga A. West nile virus and its theories, a big puzzle in Mexico and latin america. J Glob Infect Dis 2014; 5:168-75. [PMID: 24672180 PMCID: PMC3958988 DOI: 10.4103/0974-777x.122014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It has been 13 years since the first outbreak of West Nile Virus (WNV) occurred in the Americas. Since then, thousands of human cases have been reported in the United States. In contrast, there has not yet been an outbreak of WNV in any Latin American countries, including Mexico where <20 cases have been reported. We aimed to review publications to gather the main theories related to the fact that not all the countries of the continent reported human cases or that they have reported few cases since the introduction of WNV in the Western Hemisphere. We identified relevant publications using the PubMed database. Furthermore, we present on-line published information from Mexico. We found that researchers have tried to explain this phenomenon using several theories, like pre-existing antibodies against a heterotypical virus that have conferred cross protection in the population. Another explanation is that the strains circulating in Latin America are attenuated or that they came from a different origin of introduction in the continent. Another theory is that a conclusive diagnostic in regions where more than one Flavivirus is circulating results in cross-reaction in serological tests. Probably the sum of factors described by researchers in these theories in order to explain the behavior of the virus has resulted in the low number of reported cases in Latin America.
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Affiliation(s)
- Darwin Elizondo-Quiroga
- Center for Research and Assistance in Technology and Design of Jalisco (CIATEJ), Medical and Pharmaceutical Biotechnology Unit, Guadalajara, Jalisco, CP. 44270, Mexico
| | - Armando Elizondo-Quiroga
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado CO 80522
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16
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Anthony SJ, Garner MM, Palminteri L, Navarrete-Macias I, Sanchez-Leon MD, Briese T, Daszak P, Lipkin WI. West Nile virus in the British Virgin Islands. ECOHEALTH 2014; 11:255-257. [PMID: 24504904 DOI: 10.1007/s10393-014-0910-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 12/30/2013] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
West Nile virus (WNV) first emerged in the US in 1999 and has since spread across the Americas. Here, we report the continued expansion of WNV to the British Virgin Islands following its emergence in a flock of free-roaming flamingos. Histologic review of a single chick revealed lesions consistent with WNV infection, subsequently confirmed with PCR, immunohistochemistry and in situ hybridization. Full genome analysis revealed 99% sequence homology to strains circulating in the US over the past decade. This study highlights the need for rapid necropsy of wild bird carcasses to fully understand the impact of WNV on wild populations.
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Affiliation(s)
- S J Anthony
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, 722 West 168th Street, New York, NY, USA,
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17
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Takamatsu Y, Okamoto K, Dinh DT, Yu F, Hayasaka D, Uchida L, Nabeshima T, Buerano CC, Morita K. NS1' protein expression facilitates production of Japanese encephalitis virus in avian cells and embryonated chicken eggs. J Gen Virol 2014; 95:373-383. [PMID: 24443559 DOI: 10.1099/vir.0.057968-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Japanese encephalitis virus (JEV), which belongs to the genus Flavivirus of the family Flaviviridae, is a leading cause of meningo-encephalitis in Asian countries. The flavivirus non-structural protein 1 (NS1) plays a role in virus replication and in the elicitation of an immune response. The NS1' protein found among the members of the JEV subgroup is an extended form of NS1 and is generated by a -1 ribosomal frameshift. This protein is known to be involved in viral pathogenicity; however, its specific function is still unknown. Here, we describe an investigation of the molecular function of NS1' protein through the production of JEV NS1'-expressing and -non-expressing clones and their infection of avian and mammalian cells. Efficient NS1' protein expression was observed in avian cells and was found to facilitate JEV production in both avian cultured cells and embryonated chicken eggs. NS1' protein was observed to co-localize with NS5 protein and resulted in increased viral RNA levels in avian cells. These findings clearly indicate that NS1' enhances the production of JEV in avian cells and may facilitate the amplification/maintenance role of birds in the virus transmission cycle in nature.
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Affiliation(s)
- Yuki Takamatsu
- Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Kenta Okamoto
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Duc Tuan Dinh
- Respiratory Viruses Laboratory, Department of Virology, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Fuxun Yu
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Daisuke Hayasaka
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Leo Uchida
- Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Takeshi Nabeshima
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Corazon C Buerano
- Department of Molecular Epidemiology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan.,Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
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Molecular epidemiology and evolution of West Nile virus in North America. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2013; 10:5111-29. [PMID: 24135819 PMCID: PMC3823310 DOI: 10.3390/ijerph10105111] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 10/05/2013] [Accepted: 10/08/2013] [Indexed: 12/17/2022]
Abstract
West Nile virus (WNV) was introduced to New York in 1999 and rapidly spread throughout North America and into parts of Central and South America. Displacement of the original New York (NY99) genotype by the North America/West Nile 2002 (NA/WN02) genotype occurred in 2002 with subsequent identification of a novel genotype in 2003 in isolates collected from the southwestern Unites States region (SW/WN03 genotype). Both genotypes co-circulate to date. Subsequent WNV surveillance studies have confirmed additional genotypes in the United States that have become extinct due to lack of a selective advantage or stochastic effect; however, the dynamic emergence, displacement, and extinction of multiple WNV genotypes in the US from 1999–2012 indicates the continued evolution of WNV in North America.
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Beasley DWC, Barrett ADT, Tesh RB. Resurgence of West Nile neurologic disease in the United States in 2012: what happened? What needs to be done? Antiviral Res 2013; 99:1-5. [PMID: 23624155 DOI: 10.1016/j.antiviral.2013.04.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 04/02/2013] [Accepted: 04/17/2013] [Indexed: 11/29/2022]
Abstract
The resurgence in cases of neurologic disease caused by West Nile virus (WNV) in the United States in 2012 came as a surprise to the general public and to many non-arbovirus researchers. Following the introduction of WNV into the US in 1999, the number of human infections rose dramatically, peaking in 2002-03. However, cases declined from 2008-11, and it was unclear if the virus would continue to have a low-level endemic transmission pattern with occasional outbreaks, like the related flavivirus, Saint Louis encephalitis virus, or a more active pattern with annual outbreaks, including occasional years with large epidemics, like Japanese encephalitis virus. The large epidemic in 2012 suggests that the United States can expect periodic outbreaks of West Nile fever and neurologic disease in the coming years. In this paper, we consider the causes of the upsurge in WNV infections during the past year and their implications for future research and disease control measures.
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Affiliation(s)
- David W C Beasley
- Departments of Microbiology and Immunology, and Pathology, Sealy Center for Vaccine Development, Institute for Human Infections and Immunity, The University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555-0609, USA.
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