Visceral leishmaniasis in border areas: clustered distribution of phlebotomine sand flies in Clorinda, Argentina

Visceral leishmaniasis (VL) is an important zoonosis caused by Leishmania infantum, which has in the domestic dog its principal vertebrate host. VL is usually transmitted by phlebotomine sand flies, however atypical routes of transmission have been described. In this review we discuss the the role of sexual and vertical transmissions, and their role in the maintenance of VL in canine populations.

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Entomological Studies in Itaúna, Brazil, an Area With Visceral Leishmaniasis Transmission: Fauna Survey, Natural Leishmania Infection, and Molecular Characterization of the Species Circulating in Phlebotomine Sand Flies (Diptera: Psychodidae)

Journal of Medical Entomology ◽

10.1093/jme/tjz061 ◽

2019 ◽

Vol 56 (5) ◽

pp. 1368-1376 ◽

Cited By ~ 4

Author(s):

Josiane V Lopes ◽

Erika M Michalsky ◽

Nathalia C L Pereira ◽

Adão J V de Paula ◽

Fabiana O Lara-Silva ◽

...

Keyword(s):

Visceral Leishmaniasis ◽

Natural Infection ◽

Local Population ◽

Influential Factor ◽

Sand Fly ◽

Health Concern ◽

Leishmania Infection ◽

Lutzomyia Longipalpis ◽

Sand Flies ◽

Phlebotomine Sand Flies

Abstract Among neglected tropical diseases, visceral leishmaniasis (VL) shows great relevance in global terms and is a serious public health concern due to the possibility of severe and lethal forms in humans. In this study, we evaluate entomological factors such as diversity and abundance of phlebotomine sand flies (Diptera:Psychodidae) and the Leishmania species circulating in these species in possible association with VL transmission in the Brazilian town Itaúna. The entomological collections were performed during three consecutive nights, always in the third week of each month, within a period of 12 mo. A total of 1,786 sand fly specimens were collected, from which 20% were collected inside houses. The influence of three local climatic variables (temperature, rainfall, relative humidity) on the population sizes of these insects was evaluated. Temperature was the most influential factor, with a significant positive correlation with the local population size of phlebotomine sand flies collected per month. Lutzomyia longipalpis (Lutz & Neiva, 1912) was the predominant species in the study area. Leishmania DNA was detected in nine out of 133 pools of sand fly females, using nested/PCR, which resulted in a minimal natural infection rate of 2.91%. DNA from Leishmania infantum Nicolle, 1908 (Kinetoplastida: Trypanosomatida), was detected in Evandromyia cortelezzii (Bréthes, 1923), Ev. evandroi (Costa, Lima & Antunes, 1936), Ev. lenti (Mangabeira, 1938), and Ev. termitophila (Martins, Falcão & Silva, 1964), besides Lu. longipalpis. Our study indicates favorable conditions for VL spreading in Itaúna due to the presence of Lu. longipalpis and Le. infantum-infected phlebotomine sand flies.

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Lutzomyia longipalpis naturally infected by Leishmania (L.) chagasi in Várzea Grande, Mato Grosso State, Brazil, an area of intense transmission of visceral leishmaniasis

Cadernos de Saúde Pública ◽

10.1590/s0102-311x2010001200020 ◽

2010 ◽

Vol 26 (12) ◽

pp. 2414-2419 ◽

Cited By ~ 10

Author(s):

Nanci A. Missawa ◽

Érika Monteiro Michalsky ◽

Consuelo Latorre Fortes-Dias ◽

Edelberto Santos Dias

Keyword(s):

Visceral Leishmaniasis ◽

Polymerase Chain Reaction Amplification ◽

Natural Infection ◽

Rflp Analysis ◽

Lutzomyia Longipalpis ◽

Sand Flies ◽

Mato Grosso ◽

Phlebotomine Sand Flies ◽

Leishmania Spp ◽

Reaction Amplification

The American visceral leishmaniasis (AVL) is caused by parasites belonging to the genus Leishmania (Trypanosomatidae) and is transmitted to humans through the bite of certain species of infected phlebotomine sand flies. In this study, we investigated the natural infection ratio of Lutzomyia longipalpis, the main vector species of AVL in Brazil, in Várzea Grande, Mato Grosso State. Between July 2004 and June 2006, phlebotomine sand flies were captured in peridomestic areas using CDC light-traps. Four hundred and twenty (420) specimens of Lu. longipalpis were captured. 42 pools, containing 10 specimens of Lu. longipalpis each, were used for genomic DNA extraction and PCR (polymerase chain reaction) amplification. Leishmania spp. DNA was detected in three out of the 42 pools tested, resulting in a minimal infection ratio of 0.71%. Restriction fragment length polymorphism (RFLP) analysis indicated that Leishmania (L.) chagasi was the infective agent in the positive pools.

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Natural Breeding Places for Phlebotomine Sand Flies (Diptera: Psychodidae) in a Semiarid Region of Bahia State, Brazil

Journal of Tropical Medicine ◽

10.1155/2012/124068 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 16

Author(s):

Bruno Sangiorgi ◽

Daniel Neves Miranda ◽

Diego Ferreira Oliveira ◽

Edivaldo Passos Santos ◽

Fernanda Regis Gomes ◽

...

Keyword(s):

Visceral Leishmaniasis ◽

Soil Samples ◽

Semiarid Region ◽

Sand Flies ◽

Climate Variables ◽

Weekly Basis ◽

Phlebotomine Sand Flies ◽

Semiarid Climate ◽

The Mean ◽

Natural Breeding

Few microhabitats have been previously identified as natural breeding places for phlebotomine sand flies so far, and little is known about the influence of climate variables in their density. The present study was conducted in a dry region with a semiarid climate, where visceral leishmaniasis occurs in humans and dogs. The occurrence of breeding places in specific microhabitats was investigated in soil samples collected from five houses, which were also the location used for sampling of adults. All the microhabitats sampled by our study were identified as natural breeding places due to the occurrence of immature forms of sand flies. On a weekly basis, the number of adult sand flies captured was positively correlated with the mean temperature from preceding weeks. These results, in addition to promoting an advance in the knowledge of sand flies biology, may furnish a tool for optimizing the control of the sand flies, by indicating the most suitable periods and microhabitats for the application of insecticides.

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Species composition of phlebotomine sand flies and bionomics of Phlebotomus orientalis (Diptera: Psychodidae) in an endemic focus of visceral leishmaniasis in Tahtay Adiyabo district, Northern Ethiopia

Parasites & Vectors ◽

10.1186/s13071-015-0849-7 ◽

2015 ◽

Vol 8 (1) ◽

Cited By ~ 16

Author(s):

Araya Gebresilassie ◽

Oscar David Kirstein ◽

Solomon Yared ◽

Essayas Aklilu ◽

Aviad Moncaz ◽

...

Keyword(s):

Visceral Leishmaniasis ◽

Species Composition ◽

Northern Ethiopia ◽

Sand Flies ◽

Phlebotomine Sand Flies ◽

Endemic Focus ◽

Phlebotomus Orientalis ◽

Tahtay Adiyabo

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A Rare Skin Lesion During Pregnancy: Localized Cutaneous Leishmaniasis

Gynecology Obstetrics and Reproductive Medicine ◽

10.21613/gorm.2016.480 ◽

2016 ◽

Author(s):

Cihan Çetin ◽

Selim Büyükkurt ◽

Fatih Köksal ◽

Tuncay Özgünen

Keyword(s):

Infectious Disease ◽

Visceral Leishmaniasis ◽

Skin Lesion ◽

Cutaneous Leishmaniasis ◽

Amphotericin B ◽

Pregnant Patient ◽

Sand Flies ◽

Phlebotomine Sand Flies ◽

Localized Form

Leishmaniasis is an infectious disease that is spread by phlebotomine sand flies. These flies cause infections called cutaneous and/or visceral leishmaniasis in humans. In this paper, we present a pregnant patient who was diagnosed with localized cutaneous leishmaniasis, a localized form of the disease, and the treatment we applied to the patient. The patient was given systemic amphotericin-B treatment, however the immunosuppressive state of pregnancy and the diabetes of the patient complicated the treatment. Although the size of the lesion regressed during pregnancy, we could not completely cure the disease.

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