Mosquitos vetores potenciais de dirofilariose canina na Região Nordeste do Brasil

Ahid, Silvia Mm; Lourenço‐de‐Oliveira, Ricardo

doi:10.1590/s0034-89101999000600007

Cited by 32 publications

(14 citation statements)

References 9 publications

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“…A chuva deve controlar essa população de mosquitos, quando altera as condições físico-químicas nos criadouros ou mesmo carreia larvas, pupas e jangadas de ovos de um ponto do criadouro para outro, nos córregos 27,28 . Os Cx.…”

Section: Métodosunclassified

Presença de culicídeos em município de porte médio do Estado de São Paulo e risco de ocorrência de febre do Nilo Ocidental e outras arboviroses

Dibo

Menezes

Ghirardelli

et al. 2011

Rev. Soc. Bras. Med. Trop.

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RESUMO ABSTRACT Introduction:The objectives for this study were to measure the diversity of Culicidae species, describe their abundance and seasonal variation in São José do Rio Preto, SP, and discuss the risk of arbovirus infections. Methods: The collection of larval and adult mosquitoes was conducted monthly from 2006 to 2007 in an urban area and four sections of forested land. In the urban area, larvae were collected from sites where oviposition by Culex mosquitoes was most likely to occur. At two of the four sites in the forested land, adult mosquitoes were collected with the use of CDC traps at night, and a Nasci aspirator was used in the daytime at the two other collection sites. Results: In the urban area, 34 Culicidae species were identified out of a total sample of 8,683 specimens; of these specimens, 80.7% were Culex quinquefasciatus, 9.6% were Culex coronator, 3.2% were Aedes albopictus, and 1.1% were Ochlerotatus fluviatilis. The abundance of Cx. quinquefasciatus larvae was negatively related to rainfal. In the woods, 2,268 mosquitoes were collected, representing 10 genera and 46 species. The most abundant mosquito species were Aedeomyia squamipennis, Culex coronator, Culex (Mel.) Melanoconion section, Culex declarator, Ochlerotatus scapularis, Anopheles triannulatus, Culex bidens/interfor and Culex habilitator/pseudojhantinosoma. Conclusions: The abundance of Cx. quinquefasciatus in the urban area and the presence of other Culicidae species in urban areas and forested land point to the possibility of the transmission of West Nile virus and other arbovirus infections in São José do Rio Preto and other cities. Thus, the enacting of measures aimed at the surveillance of these arbovirus infections is essential.

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Section: Métodosunclassified

Presença de culicídeos em município de porte médio do Estado de São Paulo e risco de ocorrência de febre do Nilo Ocidental e outras arboviroses

Dibo

Menezes

Ghirardelli

et al. 2011

Rev. Soc. Bras. Med. Trop.

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“…In another study conducted in Maranhão State, north-eastern Brazil, L3 were detected in Cx. quinquefasciatus [29]. Indeed, a subsequent experimental study demonstrated that Cx.…”

Section: Reviewmentioning

confidence: 99%

Dirofilariosis in the Americas: a more virulent Dirofilaria immitis?

Dantas‐Torres

Otranto

2013

Parasites Vectors

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Dirofilarioses are widespread diseases caused by filarioid nematodes (superfamily Filarioidea) of the genus Dirofilaria, which are transmitted by a plethora of mosquito species. The principal agent of canine dirofilariosis in the Americas is Dirofilaria immitis, which may also occasionally infest humans, resulting in pulmonary nodules that may be confounded with malignant lung tumours. Because human cases of dirofilariosis by D. immitis are relatively frequent in the Americas and rare in Europe and other eastern countries, where Dirofilaria repens is the main causative agent, the existence of a more virulent strain of D. immitis in the Americas has been speculated. Recently, a case of human ocular infestation by Dirofilaria sp. was diagnosed in Pará State, northern Brazil, where canine heartworm dirofilariosis is endemic. The nematode was shown to be morphologically and phylogenetically related to D. immitis but it was genetically distinct from reference sequences, including those of D. immitis infesting dogs in the same geographical area. This finding raised questions regarding the aetiology of human dirofilariosis in the Americas, since information on the genetic makeup of filarioids infesting dogs and humans is meagre. Further studies would be needed to better characterize filarioids infesting dogs, wild animals, and humans in the Americas and to assess the existence of a more virulent D. immitis strain in this continent. Finally, the competence of different culicid species/strains from Europe and the Americas as vectors of Dirofilaria species should be investigated. Such studies would help us to understand possible variations in transmission patterns and even to predict possible scenarios that may emerge in the future, with the introduction of non-endemic Dirofilaria species/strains in free areas through importation of infested animals, vectors, or both.

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“…In the northeastern region Cx. quinquefasciatus and A. taeniorhynchus have been found naturally infected [13], but little is known regarding the epidemiological importance of these species, especially the latter. Unfortunately, the vector competence of two species well established throughout Brazil (A. aegypti and A. albopictus), has been poorly studied.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Larval Development of Dirofilaria immitis in Different Populations of Aedes aegypti and Aedes albopictus

Carvalho¹,

Maia²,

Ramos³

et al. 2013

OJVM

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Dirofilaria immitis is an important nematode parasite commonly known as heartworm. This filarioid is transmitted by culicid vectors and primarily affects dogs, but other animals may also become infected, such as wild carnivores, cats and humans. The aim of the present study was to assess the development of D. immitis larvae in different culicid populations under laboratory conditions. Adult females of populations of Aedes aegypti from the city of Recife (P1), the city of Campinas (P2) and the Rockefeller strain from the Centers for Disease Control (P3) and one population of Aedes albopictus from Recife (P4) were fed for two hours with infected dog blood containing 2,000 microfilariae/ml of D. immitis. After artificial feeding, the specimens were maintained under controlled conditions. Ten females from each population were dissected daily over 14 days. The infection ratio and vector efficiency index were calculated and D. immitis development from L 1 to L 3 was assessed. The larvae in P1, P2, P3 and P4 reached the third stage in 11, 10, 14 and 9 days, respectively. The vector efficiency index was 53.8%, 20.0%, 7.4% and 25.2% in P1, P2, P3 and P4, respectively. The findings demonstrate that D. immitis larvae develop in all culicid populations studied herein. Based on mosquito mortality, development time and VEI the A. albopictus population from Recife (P4) demonstrated the best performance as vector. This is the second report of D. immitis development in A. albopictus from Brazil. The present data reinforce the role of this species as vector of D. immitis in an area where greater importance has long been given to A. aegypti.

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Mosquitos vetores potenciais de dirofilariose canina na Região Nordeste do Brasil

Abstract: VOLUME 33 NÚMERO 6 DEZEMBRO 1999© Copyright Faculdade de Saúde Pública da USP. Proibida a reprodução mesmo que parcial sem a devida autorização do Editor Científico. Proibida a utilização de matérias para fins comerciais. All rights reserved. Revista de Saúde Pública

Cited by 32 publications

References 9 publications

Presença de culicídeos em município de porte médio do Estado de São Paulo e risco de ocorrência de febre do Nilo Ocidental e outras arboviroses

Presença de culicídeos em município de porte médio do Estado de São Paulo e risco de ocorrência de febre do Nilo Ocidental e outras arboviroses

Dirofilariosis in the Americas: a more virulent Dirofilaria immitis?

Evaluation of Larval Development of Dirofilaria immitis in Different Populations of Aedes aegypti and Aedes albopictus

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