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First record of Haematopinus tuberculatus (Burmeister, 1839) (Psocodea: Anoplura: Haematopinidae) parasitizing buffalo (Bubalus bubalis) in the state of Amazonas, Brazil Burmeister, Burmeister (Burmeister 1839 Psocodea (Psocodea Anoplura Haematopinidae Bubalus bubalis Amazonas 183 18 1
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Ferreira Neto, José Vicente

; Castro, Marcelo Cutrim Moreira de

; Santana, Alexandre Levi Monteiro

; Valença, Gabriel Moreira

; Aguirre, André de Abreu Rangel

; Maitra, Ahana

; Pessoa, Felipe Arley Costa

Revista Brasileira de Parasitologia Veterinária

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2024, Volume 33 N. 4 elocation e013824

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Piolhos são ectoparasitas obrigatórios de aves e mamíferos, possuindo peças bucais adaptadas para se alimentar do sangue ou de outros tecidos do corpo de seus respectivos hospedeiros. O registro de parasitas que possam ocasionar prejuízos econômicos e sanitários no rebanho bubalino do país é de suma importância e, por este motivo, no presente estudo foi relatado o primeiro registro de Haematopinus tuberculatus parasitando búfalo, no município de Autazes, Amazonas, Brasil. O estudo foi realizado em uma propriedade rural, localizada às margens do Rio Paraná Madeirinha. Foram coletados doze espécimes, identificados como H. tuberculatus, representados por cinco fêmeas, seis machos e uma ninfa de terceiro estádio. Os piolhos foram visualizados em búfalas fêmeas durante ordenha, entretanto a maior abundância foi coletada nos bezerros, na região do pescoço, dorso e lombo. Não houve amplificação de DNA visível em gel de agarose para as amostras testadas. Contudo, o registro dessa espécie de piolho parasitando búfalos no estado serve de alerta, pois surtos epizoóticos podem ocorrer na região. mamíferos hospedeiros motivo búfalo Autazes Amazonas Brasil rural Madeirinha espécimes H estádio ordenha bezerros pescoço lombo testadas Contudo alerta

Abstract Lice are obligate ectoparasites of birds and mammals with specialized mouthparts adapted to feed on the blood or other body tissues of their respective hosts. The registry of parasites that can cause economic and health impacts on the buffalo herd of the country is of utmost importance. In the present study, we report the first record of Haematopinus tuberculatus parasitizing buffalo in the municipality of Autazes, Amazonas, Brazil. The study was conducted in a rural private area located on the banks of the Paraná Madeirinha River. Twelve specimens were collected and identified as H. tuberculatus, comprising five females, six males, and one third instar nymph. The lice were observed on females buffalo during milking; however, the greatest abundance was found on calves, in the neck, back, and loin regions. There was no visible DNA amplification on agarose gel for the samples tested. However, the record of this louse species parasitizing on buffaloes in the region highlights the potential for epizootic outbreaks to occur in the area. hosts importance Autazes Amazonas Brazil River H males nymph milking however calves neck back regions tested However

https://doi.org/10.1590/s1984-29612024070

Diversity of Biting Midges Culicoides (Diptera: Ceratopogonidae) in Pacoti Municipality, Baturité Highland, Ceará State, Northeast of Brazil Diptera (Diptera Ceratopogonidae Municipality Highland State
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Farias, Emanuelle de Sousa

; Souza, Carlos Rafael Lima de

; Costa, Rute Cristina Marques

; Carvalho-Fernandes, Sheila Patrícia

; Santana, Eddie William de Pinho

; Oliveira, Leonia da Conceição de

; Ríos-Velásquez, Claudia María

; Pessoa, Felipe Arley Costa

Biota Neotropica

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2024, Volume 24 N. 4 elocation e20241668

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O gênero Culicoides é um diminuto diptero da família Ceratopogonidae com distribuição mundial. Devido aos seus hábitos hematófagos, as espécies desse gênero são um incômodo para os humanos e animais domésticos transmitem protozoários, vermes filariais, bem como, diversos arbovírus. A região Nordeste do Brasil é caracterizada por clima semiárido e poucos corpos d’água, o que não favorece criadouros de ceratopogonídeos. Além do fator climático, estudos sobre mosquitos picadores são escassos nesta região geográfica. O município de Pacoti, localizado na Serra de Baturité, no Ceará, é uma importante área de produção agrícola e ecoturismo; além disso, Pacoti está localizada na área de preservação ambiental. Devido à importância médica e veterinária desses maruins, foi então realizada uma pesquisa em Pacoti. Para a captura das amostras foram utilizadas armadilhas luminosas do tipo CDC em áreas florestadas is, onde as coletas foram realizadas em dois períodos: março de 2015 e agosto de 2022. Das 17 espécies encontradas nesse estudo, 12 são novos registros para o município de Pacoti, nove são novos registros para o estado do Ceará e quatro são registrados pela primeira vez para a região Nordeste. Das espécies vetoras incriminadas temos: C. paraensis, C. insignis e C. pusillus. O conhecimento da biodiversidade e a atualização da distribuição geográfica dos Culicoides poderão contribuir para medidas de controle de doenças transmitidas por vetores no Ceará. mundial hematófagos protozoários filariais como arbovírus dágua, dágua d água, água d’água ceratopogonídeos climático Baturité ecoturismo disso ambiental maruins is períodos 201 2022 1 estudo temos C paraensis pusillus 20 202 2

Abstract Culicoides is a small dipteran genus of Ceratopogonidae Family with worldwide distribution. Due to their hematophagous habits, species within this genus are a biting nuisance to humans and domestic animals. They also transmit protozoa, filarial worms, and several arboviruses. The Northeastern region of Brazil is characterized by a semi-arid climate and few bodies of water, which does not favor breeding sites for ceratopogonids. In addition to the climatic factor, studies on Biting Midges Culicoides are scarce in this geographic region. The municipality of Pacoti, located in Serra de Baturité, in Ceará, is an important area for agricultural production and ecotourism; also, Pacoti is located in an environmental protection area. Due to the medical and veterinary importance of these biting midges, a survey was conducted in Pacoti. For capture, CDC-type light traps were used near forested areas, where collections were carried out during two periods: March 2015, and August 2022. Of the 17 species found, 12 are new records for the municipality of Pacoti, nine are new records for the state of Ceará, and four are recorded for the first time for the Northeast region. Of the registered incriminated vectors, we found C. paraensis, C. insignis, and C. pusillus. The knowledge of biodiversity and geographic distribution update of Culicoides may contribute to prevention and control measures for vector-borne diseases in Ceará. habits animals protozoa worms arboviruses semiarid semi arid water ceratopogonids factor Baturité Ceará ecotourism midges capture CDCtype CDC type areas periods 2015 2022 1 vectors C paraensis insignis pusillus vectorborne vector borne 201 202 20 2

https://doi.org/10.1590/1676-0611-bn-2024-1668

Dirofilaria immitis is endemic in rural areas of the Brazilian Amazonas state capital, Manaus capital
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Barbosa, Ulysses Carvalho

; Nava, Alessandra Ferreira Dales

; Ferreira Neto, José Vicente

; Dias, Cindy Alves

; Silva, Viviane Costa da

; Mesquita, Hugo Guimarães de

; Sampaio, Raquel Telles de Moreira

; Barros, Wanilze Gonçalves

; Farias, Emanuelle de Sousa

; Silva, Tullio Romão Ribeiro da

; Crainey, James Lee

; Tadei, Wanderli Pedro

; Koolen, Hector Henrique Ferreira

; Pessoa, Felipe Arley Costa

Revista Brasileira de Parasitologia Veterinária

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2023, Volume 32 N. 2 elocation e000223

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O parasita filarial canino, Dirofilaria immitis, causa doença zoonótica, mas não tem sido registrado em Manaus, capital do estado do Amazonas, há mais de um século. Neste trabalho, foi relatado uma infecção por D. immitis alóctone e 27 autóctones de um levantamento de microfilárias em 766 amostras de sangue em cães domésticos, coletados entre 2017 e 2021 em Manaus. A prevalência de 15,44% (23/149) foi estabelecida em áreas rurais, 1,22% (4/328) para áreas periurbanas e de 0,35% (1/289) para duas clínicas veterinárias localizadas na zona urbana da cidade. Estes dados sugerem, portanto, que nas áreas urbanas de Manaus, nas quais o parasita é provavelmente vetorizado pela mesma espécie de mosquito que, historicamente, transmitiu Wuchereria bancrofti (Culex quinquefasciatus). Também os níveis de prevalência são baixos e, possivelmente, mantidos por um influxo de áreas rurais onde reservatórios silvestres e/ou dinâmicas de transmissão vetorial mais favoráveis mantêm uma prevalência mais elevada. canino zoonótica Manaus Amazonas século trabalho D 2 76 domésticos 201 202 1544 15 44 15,44 23/149 23149 23 149 (23/149 122 1 22 1,22 4/328 4328 4 328 (4/328 035 0 35 0,35 1/289 1289 289 (1/289 cidade sugerem portanto historicamente Culex quinquefasciatus. quinquefasciatus . quinquefasciatus) possivelmente eou ou elevada 7 20 154 15,4 23/14 2314 14 (23/14 12 1,2 4/32 432 32 (4/32 03 3 0,3 1/28 128 28 (1/28 15, 23/1 231 (23/1 1, 4/3 43 (4/3 0, 1/2 (1/2 23/ (23/ 4/ (4/ 1/ (1/ (23 (4 (1 (2 (

Abstract The canine filarial parasite Dirofilaria immitis has not been reported in Brazil´s Amazonas state capital, Manaus, for over a century. Here, we report one imported and 27 autochthonous D. immitis infections from a microfilarial survey of 766 domestic dog blood samples collected between 2017 and 2021 in Manaus. An Overall prevalence estimate of 15.44% (23/149) was calculated from our two rural collection sites; a prevalence of 1.22% (4/328) was estimated at our periurban collection site, and an overall prevalence of 0.35% (1/289) was calculated from our two urban clinic collections. Our data suggest that in the urban areas of Manaus, where the parasites are very likely vectored by the same species of mosquito that historically vectored Wuchereria bancrofti (Culex quinquefasciatus), prevalence levels are very low and possibly maintained by an influx from rural areas where sylvatic reservoirs and/or more favorable vector transmission dynamics maintain high prevalences. Brazils Brazil s capital Manaus century Here 2 D 76 201 202 1544 15 44 15.44 23/149 23149 23 149 (23/149 sites 122 1 22 1.22 4/328 4328 4 328 (4/328 site 035 0 35 0.35 1/289 1289 289 (1/289 collections Culex quinquefasciatus, quinquefasciatus , quinquefasciatus) andor or prevalences 7 20 154 15.4 23/14 2314 14 (23/14 12 1.2 4/32 432 32 (4/32 03 3 0.3 1/28 128 28 (1/28 15. 23/1 231 (23/1 1. 4/3 43 (4/3 0. 1/2 (1/2 23/ (23/ 4/ (4/ 1/ (1/ (23 (4 (1 (2 (

https://doi.org/10.1590/s1984-29612023018

Presence of trypanosomatids, with emphasis on Leishmania, in Rodentia and Didelphimorphia mammals of a rural settlement in the central Amazon region
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Achilles, Genevere Reis

; Kautzmann, Rafael Pinto

; Chagas, Haile Dean Figueiredo

; Pereira-Silva, Jordam William

; Almeida, Jéssica Feijó

; Fonseca, Fernanda Rodrigues

; da Silva, Maria Nazareth Ferreira

; Pessoa, Felipe Arley Costa

; Nava, Alessandra Ferreira Dales

; Ríos-Velásquez, Claudia María

Memórias do Instituto Oswaldo Cruz

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2021, Volume 116 elocation e200427

Abstract: En | Text: En | PDF: En

BACKGROUND Trypanosomatids are widespread and cause diseases - such as trypanosomiasis, sleeping sickness, Chagas disease, and cutaneous and visceral leishmaniasis - in animals and humans. These diseases occur in both rural and urban regions due to unplanned growth and deforestation. Thus, wild and synanthropic reservoir hosts living in residential areas are risk factors. OBJECTIVE We aimed to evaluate the diversity of small mammals (rodents and marsupials), and the occurrence of trypanosomatids, especially Leishmania, in the rural settlement of Presidente Figueiredo, Amazonas. METHODS Animals were collected using Sherman, Tomahawk, and Pitfall traps along 16 trails in four landscapes: continuous forest, forest with planting, planting, and peridomiciliar. Leishmania sp. was detected in liver samples by polymerase chain reaction targeting kDNA. FINDINGS Diversity was higher in forests with planting and lower around residences. In total, 135 mammals (81 rodents and 54 marsupials covering 14 genera) were captured. Rodents presented infection rates (IR) of 74% and marsupials of 48%. Rodents in domicile landscapes presented a higher IR (92.9%), while marsupials showed a higher IR in forests (53.3%). MAIN CONCLUSIONS The results suggest high prevalence of trypanosomatids across 12 mammalian genera possibly involved as reservoir hosts in the enzootic transmission of leishmaniasis in the Amazon’s rural, peridomiciliar landscape.

https://doi.org/10.1590/0074-02760200427 117 downloads

Diversity of biting midges Culicoides (Diptera: Ceratopogonidae), potential vectors of disease, in different environments in an Amazonian rural settlement, Brazil
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Farias, Emanuelle de Sousa

; Almeida, Jessica Feijó

; Pereira-Silva, Jordam William

; Coelho, Luiz de Souza

; Ríos-Velásquez, Claudia María

; Luz, Sérgio Luiz Bessa

; Pessoa, Felipe Arley Costa

Revista da Sociedade Brasileira de Medicina Tropical

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2020, Volume 53 elocation e20200067

Abstract: En | Text: En | PDF: En

Abstract INTRODUCTION: The Culicoides transmit a variety of pathogens. Our aim was to survey the Culicoides species occurring in an Amazonian rural settlement, comparing abundance, richness, and diversity in different environments. METHODS: Culicoides were captured using CDC light traps. The Shannon-Wiener (H’) and Rényi indices were used to compare species diversity and evenness between environments, the equitability (J’) index was used to calculate the uniformity of distribution among species, and similarity was estimated using the Jaccard similarity index. A permutational multivariate analysis of variance was applied to assess the influence of environment on species composition. A non-metric dimensional scale was used to represent the diversity profiles of each environment in a multidimensional space. RESULTS: 6.078 Culicoides were captured, representing 84 species (45 valid species/39 morphotypes). H’ values showed the following gradient: forest > capoeira > peridomicile > forest edge. The equitability J’ was greater in capoeira and forests compared to peridomiciles and the forest edge. The population compositions of each environment differed statistically, but rarefaction estimates indicate that environments of the same type possessed similar levels of richness. Species of medical and veterinary importance were found primarily in peridomiciles: C. paraensis, vector of Oropouche virus; C. insignis and C. pusillus, vectors of Bluetongue virus; C. filariferus, C. flavivenula, C. foxi, and C. ignacioi, found carrying Leishmania DNA. CONCLUSIONS: This study indicates that diversity was higher in natural environments than in anthropized environments, while abundance and richness were highest in the most anthropized environment. These findings suggest that strictly wild Culicoides can adapt to anthropized environments.

https://doi.org/10.1590/0037-8682-0067-2020 877 downloads

Insect (Hexapoda) diversity in the oceanic archipelago of Fernando de Noronha, Brazil: updated taxonomic checklist and new records
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Rafael, José Albertino

; Limeira-de-Oliveira, Francisco

; Hutchings, Roger William

; Miranda, Gil Felipe Gonçalves

; Silva Neto, Alberto Moreira da

; Somavilla, Alexandre

; Camargo, Alexssandro

; Asenjo, Angélico

; Pinto, Ângelo Parise

; Bello, Ayr de Moura

; Dalmorra, Camila

; Mello-Patiu, Cátia Antunes de

; Carvalho, Claudio José Barros de

; Takiya, Daniela Maeda

; Parizotto, Daniele Regina

; Marques, Dayse Willkenia Almeida

; Cavalheiro, Denis de Oliveira

; Mendes, Diego Matheus de Mello

; Zeppelini, Douglas

; Carneiro, Eduardo

; Lima, Élison Fabrício Bezerra

; Lima, Estevam Cipriano Araújo de

; Godoi, Fabio Siqueira Pitaluga de

; Pessoa, Felipe Arley Costa

; Vaz-de-Mello, Fernando Zagury

; Sosa-Duque, Francisco José

; Flores, Heloísa Fernandes

; Fernandes, Itanna Oliveira

; Silva-Júnior, José Osvaldo

; Gomes, Lucas Roberto Pereira

; Monné, Marcela Laura

; Castro, Marcelo Cutrim Moreira de

; Silva, Marcelo Peixoto Gomes da

; Couri, Márcia Souto

; Gottschalk, Marco Silva

; Soares, Matheus Mickael Mota

; Monné, Miguel Angel

; Rafael, Miriam Silva

; Casagrande, Mirna Martins

; Mielke, Olaf Hermann Hendrik

; Grossi, Paschoal Coelho

; Pinto, Paula Jéssica Costa

; Bartholomay, Pedro Reck

; Sobral, Rafael

; Heleodoro, Raphael Aquino

; Machado, Renato José Pires

; Corrêa, Robson Crepes

; Hutchings, Rosa Sá Gomes

; Ale-Rocha, Rosaly

; Santos, Sandra Duque dos

; Lima, Sheila Pereira de

; Mahlmann, Thiago

; Silva, Vera Cristina

; Fernandes, Daniell Rodrigo Rodrigues

Revista Brasileira de Entomologia

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2020, Volume 64 N. 3 elocation e20200052

Abstract: En | Text: En | PDF: En

ABSTRACT Hexapods, commonly known as insects, are a neglected taxonomic group in the Fernando de Noronha archipelago, with unanswered questions about their species richness and the ecological processes in which they are involved (e.g., colonization, introduction, establishment, and extinction). Herein, we provide an updated Hexapod checklist with current nomenclatural combinations. The entomofauna of the Fernando de Noronha archipelago is currently composed of 453 species in 21 orders. The orders, and their respective number of species, are: Blattaria (9), Coleoptera (118), Collembola (29), Dermaptera (3), Diplura (1), Diptera (134), Embioptera (1), Hemiptera (29), Hymenoptera (59), Isoptera (2), Lepidoptera (25), Mantodea (1), Neuroptera (3), Odonata (5), Orthoptera (11), Phasmatodea (1), Phthiraptera (6), Psocoptera (3), Siphonaptera (1), Thysanoptera (10), and Zygentoma (2). The archipelago has 263 new taxon records (family + genera + species). Thirty-eight species (3.39%) were described from local specimens and most of them are likely endemic species. This study more than doubles our knowledge (from the previous 190 records) of the entomofauna in this large Brazilian archipelago. This study also provides a baseline for studies on its conservation status and for implementing future environmental management programs.

https://doi.org/10.1590/1806-9665-rbent-2020-0052 2462 downloads

Chicken eggs as a surveillance tool for malaria and leishmaniasis vector presence
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Silva, Rarissa de Oliveira e

; Almeida, Maria Edilene Martins de

; Marialva, Eric Fabrício

; Balieiro, Antônio Alcirley da Silva

; Castro, Diogo Pereira de

; Rios-Velasquez, Cláudia Maria

; Mariúba, Luis André Morais

; Pessoa, Felipe Arley Costa

Revista da Sociedade Brasileira de Medicina Tropical

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2019, Volume 52 elocation e20180415

Abstract: En | Text: En | PDF: En

Abstract INTRODUCTION: Malaria and leishmaniases are transmitted by vectors during blood-feeding. Vector-infected animals develop antibodies against the vector’s saliva. This study evaluated IgY antibody detection in the chicken eggs exposed to bites from Migonemyia migonei, Lutzomyia longipalpis and Anopheles aquasalis. METHODS: We used ELISA to quantify the antibody levels in the sera and exposed chicken eggs. RESULTS: High IgY levels were observed following immunization; furthermore, higher reactivity was observed in the eggs and species-specific immune response was observed post final immunization. CONCLUSIONS: Chicken eggs can be used as sentinels to surveil vector saliva antibodies.

https://doi.org/10.1590/0037-8682-0415-2018 1612 downloads

Sensitivity of diagnostic methods for Mansonella ozzardi microfilariae detection in the Brazilian Amazon Region
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Medeiros, Jansen Fernandes

; Fontes, Gilberto

; Nascimento, Vilma Lopes do

; Rodrigues, Moreno

; Cohen, Jacob

; Andrade, Edmar Vaz de

; Pessoa, Felipe Arley Costa

; Martins, Marilaine

Memórias do Instituto Oswaldo Cruz

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mar 2018, Volume 113 N. 3 Pages 173 - 177

Abstract: En | Text: En | PDF: En

BACKGROUND The human filarial worm Mansonella ozzardi is highly endemic in the large tributaries of the Amazon River. This infection is still highly neglected and can be falsely negative when microfilariae levels are low. OBJECTIVES This study investigated the frequency of individuals with M. ozzardi in riverine communities in Coari municipality, Brazilian Amazon. METHODS Different diagnostic methods including polymerase chain reaction (PCR), blood polycarbonate membrane filtration (PCMF), Knott's method (Knott), digital thick blood smears (DTBS) and venous thick blood smears (VTBS) were used to compare sensitivity and specificity among the methods. Data were analysed using PCMF and Bayesian latent class models (BLCM) as the gold standard. We used BLCM to calculate the prevalence of mansonelliasis based on the results of five diagnostic methods. FINDINGS The prevalence of mansonelliasis was 35.4% by PCMF and 30.1% by BLCM. PCR and Knott methods both possessed high sensitivity. Sensitivity relative to PCMF was 98.5% [95% confidence interval (CI): 92.0 - 99.7] for PCR and 83.5% (95% CI: 72.9 - 90.5) for Knott. Sensitivity derived by BLCM was 100% (95% CI 93.7 - 100) for PCMF, 100% (95% CI: 93.7 - 100) for PCR and 98.3% (95% CI: 90.6 - 99.9) for Knott. The odds ratio of being diagnosed as microfilaremic increased with age but did not differ between genders. Microfilariae loads were higher in subjects aged 30 - 45 and 45 - 60 years. MAIN CONCLUSIONS PCMF and PCR were the best methods to assess the prevalence of mansonelliasis in our samples. As such, using these methods could lead to higher prevalence of mansonelliasis in this region than the most commonly used method (i.e., thick blood smears).

https://doi.org/10.1590/0074-02760170321 950 downloads

Lutzomyia umbratilis from an area south of the Negro River is refractory to in vitro interaction with Leishmania guyanensis
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Soares, Rodrigo Pedro

; Nogueira, Paula Monalisa

; Secundino, Nágila Francinete

; Marialva, Eric Fabrício

; Ríos-Velásquez, Cláudia Maria

; Pessoa, Felipe Arley Costa

Memórias do Instituto Oswaldo Cruz

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mar 2018, Volume 113 N. 3 Pages 202 - 205

Abstract: En | Text: En | PDF: En

BACKGROUND Lutzomyia umbratilis, the vector for Leishmania guyanensis in northern South America, has been found naturally infected with L. guyanensis only in areas north of the Negro and Amazon rivers. While populations of this sand fly species are also found in areas south of these rivers, these populations have never been reported to be infected and/or transmitting L. guyanensis. However, no studies on the corresponding host-parasite interactions are available. OBJECTIVES This study evaluated the interaction between Lu. guyanensis promastigotes and field-collected Lu. umbratilis sand flies from Rio Preto da Eva and Manacapuru, which are located to the north and south, respectively, of the Negro River. METHODS Procyclic and metacyclic attachment was quantified using an in vitro system. FINDINGS Low attachment of parasites to the midguts of insects collected from Manacapuru was detected. Conversely, greater binding of metacyclic parasites was observed in the midguts of insects collected from Rio Preto da Eva, and this attachment was more pronounced than that observed for procyclics (p < 0.03). MAIN CONCLUSIONS The Lu. umbratilis population from an area south of the Negro River has lower in vitro interaction with L. guyanensis. The higher attachment of L. guyanensis to midguts of insects from Rio Preto da Eva may suggest better vector competence. These findings are in accordance with previously reported epidemiological information of American cutaneous leishmaniasis (ACL) transmission in the Amazon.

https://doi.org/10.1590/0074-02760170425 1163 downloads

10.

First evidence of Zika virus venereal transmission in Aedes aegypti mosquitoes
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Pereira-Silva, Jordam William

; Nascimento, Valdinete Alves do

; Belchior, Heliana Christy Matos

; Almeida, Jéssica Feijó

; Pessoa, Felipe Arley Costa

; Naveca, Felipe Gomes

; Ríos-Velásquez, Claudia María

Memórias do Instituto Oswaldo Cruz

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jan 2018, Volume 113 N. 1 Pages 56 - 61

Abstract: En | Text: En | PDF: En

BACKGROUND Aedes aegypti is considered the main Zika virus (ZIKV) vector, and is thought to be responsible for the 2015-2016 outbreak in Brazil. Zika positive Ae. aegypti males collected in the field suggest that vertical and/or venereal transmission of ZIKV may occur. OBJECTIVES In this study, we aimed to demonstrate that venereal transmission of ZIKV by Ae. aegypti can occur under laboratory conditions. METHODS Ae. aegypti collected in the city of Manaus, confirmed as negative for Zika, Dengue and Chikungunya virus by reverse transcription real-time polymerase chain reaction (RT-qPCR) (AaM3V- strain), were reared under laboratory conditions and used for the experiments. The ZIKV used in this study was isolated from a patient presenting with symptoms; ZIKV was confirmed by RT-qPCR. Experiment 1: virgin male mosquitoes of AaM3V- strain were intrathoracically inoculated with a ZIKV suspension; four days after injection, they were transferred to a cage containing virgin females of AaM3V- strain and left to copulate for five days. Experiment 2: virgin female mosquitoes of AaM3V- strain were orally infected with a ZIKV suspension by blood feeding membrane assay; nine days after blood feeding, they were placed in cages with Ae. aegypti AaM3V- virgin males and left to copulate for four days. After copulation, all mosquitoes were individually evaluated for viral infection by RT-qPCR. FINDINGS The mean infection rate in Experiment 1 and Experiment 2 was 45% and 35%, respectively. In both experiments, cycle threshold values ranged from 13 to 35, indicating the presence of viral genomes. MAIN CONCLUSION Ae. aegypti males intrathoracically inoculated with a ZIKV suspension are infected and can transmit the virus to uninfected females by mating. Moreover, Ae. aegypti females orally infected with a ZIKV suspension can transmit the virus to uninfected males by copulation. This study shows that ZIKV infection of Ae. aegypti mosquitoes occurs not only during blood feeding, but also during copulation.

https://doi.org/10.1590/0074-02760170329 3295 downloads

11.

Trichophoromyia auraensis is a putative vector
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Teles, Carolina Bioni Garcia

; Pessoa, Felipe Arley Costa

; Medeiros, Jansen Fernandes

; Camargo, Luís Marcelo Aranha

; Araujo-Pereira, Thais de

; Pita-Pereira, Daniela de

; Boité, Mariana Côrtes

; Melo, Myllena

; Costa-Rego, Taiana Amancio da

; Fuzari, Andressa Alencastre

; Brazil, Reginaldo Peçanha

; Britto, Constança

Memórias do Instituto Oswaldo Cruz

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jul 2017, Volume 112 N. 7 Pages 517 - 519

Abstract: En | Text: En | PDF: En

The sandfly Trichophoromyia auraensis has recently evolved as a proven vector of Leishmania (Viannia) endemic to state of Acre in the north of Brazil. This note is intended to propose a correction in the report of the first occurrence of natural infection of Leishmania (Viannia) in this species. We and the other scientific groups reinforced that Tr. auraensis is a possible vector involved in the transmission of American cutaneous leishmaniasis in Acre, Brazil.

https://doi.org/10.1590/0074-02760170024 990 downloads

12.

Phlebotomine sandfly (Diptera: Psychodidae) diversity and their Leishmania DNA in a hot spot of American Cutaneous Leishmaniasis human cases along the Brazilian border with Peru and Bolivia
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Teles, Carolina Bioni Garcia

; Santos, Ana Paula de Azevedo dos

; Freitas, Rui Alves

; Oliveira, Arley Faria José de

; Ogawa, Guilherme Maerschner

; Rodrigues, Moreno Souza

; Pessoa, Felipe Arley Costa

; Medeiros, Jansen Fernandes

; Camargo, Luís Marcelo Aranha

Memórias do Instituto Oswaldo Cruz

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jul 2016, Volume 111 N. 7 Pages 423 - 432

Abstract: En | Text: En | PDF: En

In this study, we identified the phlebotomine sandfly vectors involved in the transmission of American Cutaneous Leishmaniasis (ACL) in Assis Brasil, Acre, Brazil, which is located on the Brazil-Peru-Bolivia frontier. The genotyping of Leishmania in phlebotomines was performed using polymerase chain reaction (PCR) and PCR-restriction fragment length polymorphism. A total of 6,850 sandflies comprising 67 species were captured by using CDC light traps in rural areas of the municipality. Three sandfly species were found in the state of Acre for the first time: Lutzomyia georgii, Lu. complexa and Lu. evangelistai. The predominant species was Lu. auraensis/Lu. ruifreitasi and Lu. davisi (total 59.27%). 32 of 368 pools were positive for the presence of Leishmania DNA (16 pools corresponding to Lu. davisi, and 16 corresponding to Lu. auraensis/Lu. ruifreitasi), with a minimal infection prevalence of 1.85% in Lu. davisi and 2.05% in Lu. auraensis/Lu. ruifreitasi. The Leishmania species found showed maximum identity with L. (Viannia) guyanensis and L. (V.) braziliensis in both phlebotomine species. Based on these results and similar scenarios previously described along the Brazil/Peru/Bolivia tri-border, the studied area must take into consideration the possibility of Lu. davisi and Lu. auraensis/Lu. ruifreitasi as probable vectors of ACL in this municipality.

https://doi.org/10.1590/0074-02760160054 1833 downloads

13.

The genital atrium armature of some Brazilian sand fly females (Diptera: Phlebotominae)
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FARIAS, Emanuelle de Sousa

; ALENCAR, Ronildo Baiatone

; JUSTINIANO, Sílvia Brandão

; FREITAS, Rui Alves de

; COELHO, Luiz de Souza

; RIOS-VELÁSQUEZ, Claudia María

; PESSOA, Felipe Arley Costa

Acta Amazonica

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mar 2015, Volume 45 N. 1 Pages 81 - 88

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Os flebotomíneos são insetos de importância médica. Na região Neotropical existe grande diversidade de espécies. Algumas dessas espécies são consideradas espécies crípticas devido às semelhanças morfológicas entre fêmeas adultas de diferentes espécies, tornando a identificação especialmente difícil. O objetivo deste estudo foi analisar e descrever a armadura no átrio genital (AAG) de algumas fêmeas adultas de flebotomíneos, a fim de descobrir novos caracteres taxonômicos que tornem possível a distinção por análise da AAG entre as espécies que poderiam ser tratadas como espécies crípticas. Foram descritas a AAG de 16 espécies de flebotomíneos. Diferenças distintas foram encontradas em relação à forma e ao tamanho da armadura, a presença ou ausência de espinhos na armadura, e a forma, tamanho e padrões de agrupamento dos espinhos. Esses caracteres tornou possível a distinção entre as espécies estudadas.

Phlebotomine sand flies are insects of medical importance. Species in the Neotropical region are highly diverse. Some of these species are considered cryptic species because of their morphological similarity between adult females of different species make identification especially difficult. The aim of this study was to analyze and describe the armature in the genital atrium (AGA) of some adult female sand flies, in order to discover new taxonomic characters that make it possible to distinguish between species that would otherwise be treated as cryptic by analysis of the AGA. The AGA of 16 Phlebotomine sand fly species are described. Distinct differences were found in relation to the shape and size of the armature, the presence or absence of spines on the armature, and the shape, size, and grouping patterns of the spines. These characters made it possible to distinguish between the species studied.

https://doi.org/10.1590/1809-4392201305694 2394 downloads

14.

Mansonella ozzardi in the municipality of Tefé, Amazonas, Brazil, 60 years after the first report: an epidemiologic study
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Medeiros, Jansen Fernandes

; Rodrigues, Moreno Souza

; Katsuragawa, Tony Hiroshi

; Costa, Cristóvão Alves

; Pessoa, Felipe Arley Costa

Memórias do Instituto Oswaldo Cruz

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jul 2014, Volume 109 N. 4 Pages 480 - 483

Abstract: En | Text: En | PDF: En

The prevalence of mansonelliasis was studied in the municipality of Tefé, state of Amazonas, Brazil. The prevalence (thick blood smear method) was 13.6% (147/1,078), higher in the Solimões River region (16.3%) than in the Tefé River region (6.3%). In the sampled communities in the Solimões River region, a higher density of cases was observed, as indicated by a kernel analysis (odds ratio 0.34; 95% confidence interval: 0.20-0.57). Males had a higher prevalence (χ2 = 31.292, p < 0.001) than women. Mansonella ozzardi prevalence was higher in retirees and farmers (28.9% and 27%, respectively). Prevalence also significantly increased with age (χ2 = -128.17, p < 0.001), with the highest numbers occurring in persons older than 67 years.

https://doi.org/10.1590/0074-0276130512 1245 downloads Cited 1 time in SciELO

15.

Mansonella ozzardi (Nematoda: Onchocercidae) in the riverine population of the Tefé River, State of Amazonia, Brazil
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Medeiros, Jansen Fernandes

; Costa, Cristóvão Alves

; Lima, Alita Moura de

; Pessoa, Felipe Arley Costa

Revista da Sociedade Brasileira de Medicina Tropical

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jan 2014, Volume 47 N. 1 Pages 113 - 115

Abstract: En | Text: En | PDF: En

Introduction: This study assessed the prevalence of Mansonella ozzardi in riverine communities of the Tefé River, Amazonas, Brazil. Methods: The prevalence of M. ozzardi was estimated by microscopic examination of thick blood smears. Results: The M. ozzardi prevalence rate was 6.3% (19/300). Filarial infection was found in 8 of the 11 communities surveyed, with prevalence rates varying from 2.5% to 22.2%. Conclusions: Tefé is a region of oil and natural gas exploration, in which there is a high turnover of workers. Migration patterns may facilitate the dissemination of mansonelliasis to other regions.

https://doi.org/10.1590/0037-8682-0031-2012 1624 downloads Cited 2 times in SciELO

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