Phenetic analysis of Panstrongylus megistus Burmeister, 1835 (Hemiptera: Reduviidae: Triatominae) in the State of Paraná-Brazil
Panstrongylus megistus is an important Chagas Disease vector and is said to be one of the species that might replace Triatoma infestans as the main vector of that disease in Brazil. The different degrees of P. megistus domiciliation in Brazil and its epidemiological relevance draw forth the need for...
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Published in: | Brazilian archives of biology and technology Vol. 52; no. 2; pp. 349 - 357 |
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Abstract | Panstrongylus megistus is an important Chagas Disease vector and is said to be one of the species that might replace Triatoma infestans as the main vector of that disease in Brazil. The different degrees of P. megistus domiciliation in Brazil and its epidemiological relevance draw forth the need for the development of genetic studies that make it possible to analyze and understand the interchange of individual and gene fluxes among different populations. Thus, the present work aimed at studying the genetic variability of P. megistus in the State of Paraná - south of Brazil- and at comparing it with populations of the same species from five other states in Brazil (SP, MG, SC, RS, SE). In order to attain the proposed objective, 25 populations were studied using fifteen isoenzymatic systems (6PGD, G6PD, ME¹, ME², ICD, PGM, GPI, GOT¹, GOT², NP¹, NP², DIA, MPI, F, and MDH). The phenetic analysis allowed the individuation of 22 electromorphs and five zymodemes. The G6PD enzyme was the only polymorphic one presenting four electromorphs for the studied populations, all of them described for the State of Paraná-BR. The P. megistus populations from other states grouped with those from Paraná-BR, evidencing a low genetic variability in that species. Despite the existing geographic barriers, sub-samples - away from one another by at most 570km - were grouped in one and the same zymodeme. The epidemiological implications of such results are discussed in the present work.
Panstrongylus megistus é um importante vetor da Doença de Chagas e é apontado como uma das espécies com potencial para substituir Triatoma infestans como principal vetor desta doença no Brasil. Os diferentes graus de domiciliação por P. megistus - no Brasil - e sua importância epidemiológica evocam a necessidade de estudos com bases genéticas que possibilitem analisar e compreender os intercâmbios de indivíduos e os fluxos gênicos entre as distintas populações. Assim, o presente trabalho tem como objetivo estudar a variabilidade genética de P. megistus no Estado do Paraná e compará-los com populações da mesma espécie de cinco estados do Brasil (SP, MG, SC, RS, SE). Para atingir o objetivo proposto, 25 populações foram estudadas empregando quinze sistemas isoenzimáticos (6PGD, G6PD, ME¹, ME², ICD, PGM, GPI, GOT¹, GOT², NP¹, NP², DIA, MPI, FH e MDH). A análise fenética permitiu a individualização de 22 eletromorfos e quatro zimodemas. A enzima G6PD foi a única polimórfica que apresentou quatro eletromorfos para as populações estudadas, todas descritas para o Estado do Paraná. As populações de P. megistus procedentes dos outros estados agruparam-se com as do Paraná, demonstrando haver baixa variabilidade genética na espécie. Apesar das barreiras geográficas existentes, sub-amostras - distantes entre si por até 570 km - ficaram reunidas num mesmo zimodema. As implicações epidemiológicas destes resultados são discutidas no presente trabalho. |
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AbstractList | Panstrongylus megistus is an important Chagas Disease vector and is said to be one of the species that might replace Triatoma infestans as the main vector of that disease in Brazil. The different degrees of P. megistus domiciliation in Brazil and its epidemiological relevance draw forth the need for the development of genetic studies that make it possible to analyze and understand the interchange of individual and gene fluxes among different populations. Thus, the present work aimed at studying the genetic variability of P. megistus in the State of Paraná - south of Brazil- and at comparing it with populations of the same species from five other states in Brazil (SP, MG, SC, RS, SE). In order to attain the proposed objective, 25 populations were studied using fifteen isoenzymatic systems (6PGD, G6PD, ME¹, ME², ICD, PGM, GPI, GOT¹, GOT², NP¹, NP², DIA, MPI, F, and MDH). The phenetic analysis allowed the individuation of 22 electromorphs and five zymodemes. The G6PD enzyme was the only polymorphic one presenting four electromorphs for the studied populations, all of them described for the State of Paraná-BR. The P. megistus populations from other states grouped with those from Paraná-BR, evidencing a low genetic variability in that species. Despite the existing geographic barriers, sub-samples - away from one another by at most 570km - were grouped in one and the same zymodeme. The epidemiological implications of such results are discussed in the present work.Panstrongylus megistus é um importante vetor da Doença de Chagas e é apontado como uma das espécies com potencial para substituir Triatoma infestans como principal vetor desta doença no Brasil. Os diferentes graus de domiciliação por P. megistus - no Brasil - e sua importância epidemiológica evocam a necessidade de estudos com bases genéticas que possibilitem analisar e compreender os intercâmbios de indivíduos e os fluxos gênicos entre as distintas populações. Assim, o presente trabalho tem como objetivo estudar a variabilidade genética de P. megistus no Estado do Paraná e compará-los com populações da mesma espécie de cinco estados do Brasil (SP, MG, SC, RS, SE). Para atingir o objetivo proposto, 25 populações foram estudadas empregando quinze sistemas isoenzimáticos (6PGD, G6PD, ME¹, ME², ICD, PGM, GPI, GOT¹, GOT², NP¹, NP², DIA, MPI, FH e MDH). A análise fenética permitiu a individualização de 22 eletromorfos e quatro zimodemas. A enzima G6PD foi a única polimórfica que apresentou quatro eletromorfos para as populações estudadas, todas descritas para o Estado do Paraná. As populações de P. megistus procedentes dos outros estados agruparam-se com as do Paraná, demonstrando haver baixa variabilidade genética na espécie. Apesar das barreiras geográficas existentes, sub-amostras - distantes entre si por até 570 km - ficaram reunidas num mesmo zimodema. As implicações epidemiológicas destes resultados são discutidas no presente trabalho. Panstrongylus megistus is an important Chagas Disease vector and is said to be one of the species that might replace Triatoma infestans as the main vector of that disease in Brazil. The different degrees of P. megistus domiciliation in Brazil and its epidemiological relevance draw forth the need for the development of genetic studies that make it possible to analyze and understand the interchange of individual and gene fluxes among different populations. Thus, the present work aimed at studying the genetic variability of P. megistus in the State of Parana - south of Brazil- and at comparing it with populations of the same species from five other states in Brazil (SP, MG, SC, RS, SE). In order to attain the proposed objective, 25 populations were studied using fifteen isoenzymatic systems (6PGD, G6PD, ME1, ME2, ICD, PGM, GPI, GOT1, GOT2, NP1, NP2, DIA, MPI, F, and MDH). The phenetic analysis allowed the individuation of 22 electromorphs and five zymodemes. The G6PD enzyme was the only polymorphic one presenting four electromorphs for the studied populations, all of them described for the State of Parana-BR. The P. megistus populations from other states grouped with those from Parana-BR, evidencing a low genetic variability in that species. Despite the existing geographic barriers, sub-samples - away from one another by at most 570km - were grouped in one and the same zymodeme. The epidemiological implications of such results are discussed in the present work. Panstrongylus megistus is an important Chagas Disease vector and is said to be one of the species that might replace Triatoma infestans as the main vector of that disease in Brazil. The different degrees of P. megistus domiciliation in Brazil and its epidemiological relevance draw forth the need for the development of genetic studies that make it possible to analyze and understand the interchange of individual and gene fluxes among different populations. Thus, the present work aimed at studying the genetic variability of P. megistus in the State of Paraná - south of Brazil- and at comparing it with populations of the same species from five other states in Brazil (SP, MG, SC, RS, SE). In order to attain the proposed objective, 25 populations were studied using fifteen isoenzymatic systems (6PGD, G6PD, ME¹, ME², ICD, PGM, GPI, GOT¹, GOT², NP¹, NP², DIA, MPI, F, and MDH). The phenetic analysis allowed the individuation of 22 electromorphs and five zymodemes. The G6PD enzyme was the only polymorphic one presenting four electromorphs for the studied populations, all of them described for the State of Paraná-BR. The P. megistus populations from other states grouped with those from Paraná-BR, evidencing a low genetic variability in that species. Despite the existing geographic barriers, sub-samples - away from one another by at most 570km - were grouped in one and the same zymodeme. The epidemiological implications of such results are discussed in the present work. Panstrongylus megistus é um importante vetor da Doença de Chagas e é apontado como uma das espécies com potencial para substituir Triatoma infestans como principal vetor desta doença no Brasil. Os diferentes graus de domiciliação por P. megistus - no Brasil - e sua importância epidemiológica evocam a necessidade de estudos com bases genéticas que possibilitem analisar e compreender os intercâmbios de indivíduos e os fluxos gênicos entre as distintas populações. Assim, o presente trabalho tem como objetivo estudar a variabilidade genética de P. megistus no Estado do Paraná e compará-los com populações da mesma espécie de cinco estados do Brasil (SP, MG, SC, RS, SE). Para atingir o objetivo proposto, 25 populações foram estudadas empregando quinze sistemas isoenzimáticos (6PGD, G6PD, ME¹, ME², ICD, PGM, GPI, GOT¹, GOT², NP¹, NP², DIA, MPI, FH e MDH). A análise fenética permitiu a individualização de 22 eletromorfos e quatro zimodemas. A enzima G6PD foi a única polimórfica que apresentou quatro eletromorfos para as populações estudadas, todas descritas para o Estado do Paraná. As populações de P. megistus procedentes dos outros estados agruparam-se com as do Paraná, demonstrando haver baixa variabilidade genética na espécie. Apesar das barreiras geográficas existentes, sub-amostras - distantes entre si por até 570 km - ficaram reunidas num mesmo zimodema. As implicações epidemiológicas destes resultados são discutidas no presente trabalho. |
Author | Steindel, Mário(Universidade Federal de Santa Catarina Departamento de Microbiologia e Parasitologia) Kopp, Rogério Luiz(Universidade Federal do Paraná Departamento de Patologia Médica) Thomaz-Soccol, Vanete(Universidade Federal do Paraná Departamento de Patologia Básica) Membrive, Norberto(Fundação Nacional de Saúde Laboratório de Entomologia) Jurberg, José(Fundação Nacional de Saúde) Kopp, Denize Cristina Trevisan(Universidade Federal do Paraná Departamento de Clínica Médica) Barata, José Maria Soares(Escola de Saúde Pública) Luz, Ennio(Universidade Federal do Paraná Departamento de Patologia Básica) Castro, Edilene Alcântara de(Universidade Federal do Paraná Departamento de Patologia Básica) Klisiowicz, Débora do Rocio(Universidade Federal do Paraná Departamento de Patologia Básica) |
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SubjectTerms | genetic variability Hemiptera isoenzymes Panstrongylus megistus Reduviidae Triatoma infestans Triatominae triatomines |
Title | Phenetic analysis of Panstrongylus megistus Burmeister, 1835 (Hemiptera: Reduviidae: Triatominae) in the State of Paraná-Brazil |
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