Vetores de tripanosomatídeos (Kinetoplastida: Trypanosomatidae) em Tabatinga, Amazonas, Brasil

Soares, Fabiane Veloso; Freitas, Rui Alves de; Figueira, Luanda de Paula; Franco, Antônia Maria Ramos

doi:10.22571/actabra12201718

Cited by 2 publications

(3 citation statements)

References 23 publications

(27 reference statements)

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“…The presence of Ny. umbratilis in the peridomicile was reported in: (i) Manaus, in a rural community (24 specimens) [ 38 ], and an area near residual forest (23 specimens) [ 16 ]; (ii) Presidente Figueiredo, in a rural settlement (38 specimens) [ 17 ]; and (iii) Tabatinga, in rural settlements (2 specimens) [ 39 ]. The collection methods adopted in our study made it possible to observe the presence of Ny.…”

Section: Discussionmentioning

confidence: 99%

“…There have been few studies on natural infection by Leishmania in the Amazonas state, and most involved the dissection of individual sand flies to detect the presence of trypanosomatid forms [ 10 , 11 , 16 , 39 , 46 , 47 ]. The detection of Leishmania using molecular methods such as PCR has been performed in only two other studies of the Amazonas [ 7 , 9 ].…”

Section: Discussionmentioning

confidence: 99%

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Composition of sand fly fauna (Diptera: Psychodidae) and detection of Leishmania DNA (Kinetoplastida: Trypanosomatidae) in different ecotopes from a rural settlement in the central Amazon, Brazil

et al. 2018

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BackgroundPhlebotomine sand flies (Diptera: Psychodidae) are vectors of Leishmania species, the etiological agents of leishmaniasis, which is one of the most important emerging infectious diseases in the Americas. In the state of Amazonas in Brazil, anthropogenic activities encourage the presence of these insects around rural homes. The present study aimed to describe the composition and distribution of sand fly species diversity among the ecotopes (intradomicile, peridomicile and forest) in an area of American cutaneous leishmaniasis transmission and detect natural infection with Leishmania DNA to evaluate which vectors are inside houses and whether the presence of possible vectors represents a hazard of transmission.ResultsPhlebotomine sand flies were collected using light traps. A total of 2469 specimens representing 54 species, predominantly females (71.2%), were collected from four sites. Polymerase chain reaction analysis was performed on 670 samples to detect Leishmania DNA. Most of the samples (79.5%) were collected in the forest, with areas closer to rural dwellings yielding a greater abundance of suspected or proven vectors and a larger number of species containing Leishmania DNA. Nyssomyia umbratilis and Bichromomyia flaviscutellata were found near rural homes, and Ny. umbratilis was also found inside homes. Leishmania DNA was detected in different species of sand flies in all ecotopes, including species with no previous record of natural infection.ConclusionsThere is no evidence that vectors of American cutaneous leishmaniasis are becoming established inside homes, but there are sand flies, including Ny. umbratilis and other possible vectors, in environments characterized by a human presence. These species continue to be predominant in the forest but are prevalent in areas closer to ecotopes with a greater human presence. The existence of proven or suspected vectors in this ecotope is due to the structural organization of rural settlements and may represent a hazard of transmission. Although the detection of Leishmania DNA in species that were not previously considered vectors does not mean that they are transmitting the parasite, it does show that the parasite is circulating in ecotopes where these species are found.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Composition of sand fly fauna (Diptera: Psychodidae) and detection of Leishmania DNA (Kinetoplastida: Trypanosomatidae) in different ecotopes from a rural settlement in the central Amazon, Brazil

et al. 2018

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“…American Tegumentary Leishmaniasis (ATL) is a zoonosis of worldwide distribution, whose etiological agents are protozoa of the genus Leishmania spp. This contemplates at least seven dermotropic species of relevance to public health in Brazil, these being: Leishmania (Viannia) guyanensis; L. (V.) naiffi; L. (V.) braziliensis; L. (V.) lainsoni; L. (V.) shawi; L. (V.) lindenbergi e L. (Leishmania) amazonensis (SILVEIRA et al, 2008;SOARES et al, 2017;BRASIL, 2017). However, the species Leishmania (V) braziliensis is considered the main etiologic agent involved in the Brazilian territory.…”

Section: Introductionmentioning

confidence: 99%

Retrospective study of american cutaneous leishmaniosis in humans in the city of Manaus, Amazonas (2018-2019)

Maia¹,

Albuquerque²,

Rocha³

et al. 2021

SFJEAS

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American Tegumentary Leishmaniasis (ATL) is characterized as a zoonosis caused by protozoa of the genus Leishmania spp., presenting a chronic, non-contagious evolution, and its transmission occurs through the bite of sand fly insects (Diptera: Psychodidae). The process of expansion of cities, agricultural frontiers, and the occupation of peripheral areas contribute to the occurrence of epidemic outbreaks of the disease. This article aimed to study the incidence of human cases of ATL in the city of Manaus, describing qualitatively and quantitatively the occurrence of this disease. From the transfer of data from the Notifiable Diseases Information System - SINAN, made available by the Amazonas Health Surveillance Foundation - FVS/AM, this study describes a total of 789 cases, which occurred between 2018 and 2019, in the capital of Amazonas, which were classified according to age, gender, occupation, clinical signs, as well as the condition of the autochthonous case, the relationship with work, and the evolution of the case. As a result, 789 cases were confirmed, ranging in age from 1 to 90 years, and with a higher prevalence in males. As for the form of the lesion, the cutaneous type was identified in 98.73% of the cases, and 57% of the cases had a clinical cure. The results show ATL as a disease related to the socioeconomic and mainly health conditions in which the patient fits, with a high number of patients in large expanding cities, such as the city of Manaus. Thus, further work is needed to provide clarification on the disease, especially in the state of Amazonas, as it is still a neglected disease and related to the population's living conditions.

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Vetores de tripanosomatídeos (Kinetoplastida: Trypanosomatidae) em Tabatinga, Amazonas, Brasil

Cited by 2 publications

References 23 publications

Composition of sand fly fauna (Diptera: Psychodidae) and detection of Leishmania DNA (Kinetoplastida: Trypanosomatidae) in different ecotopes from a rural settlement in the central Amazon, Brazil

Composition of sand fly fauna (Diptera: Psychodidae) and detection of Leishmania DNA (Kinetoplastida: Trypanosomatidae) in different ecotopes from a rural settlement in the central Amazon, Brazil

Retrospective study of american cutaneous leishmaniosis in humans in the city of Manaus, Amazonas (2018-2019)

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