Identification of the natural breeding sites of sandflies (Diptera: Psychodidae: Phlebotominae), potential vectors of leishmaniasis, in the province of Chaco, Argentina

Abstract

The aim of this work was to identify the natural breeding sites of sandflies in the province of Chaco, Argentina, for the first time. Preliminary studies were conducted in two different phytogeographic regions: dry Chaco (Parque Provincial Pampa del Indio), in January 2010, and humid Chaco (Resistencia, Margarita Belén and Colonia Benítez), from May-September 2010. A total of 127 samples were collected (Pampa del Indio: 15, Resistencia: 37, Margarita Belén: 36, Colonia Benítez: 39). A female of Migonemyia migonei was found in Pampa del Indio at the base of a bromeliad in the summer (January) and a pupal exuvium of a phlebotomine fly was found in Resistencia, in a place where dogs rested, in the winter (July). These findings highlighted these two sites as potential breeding sites. Because the existence of potential natural breeding sites for sandflies has been demonstrated in both forest and periurban areas, expanding the search efforts and characterising these sites will enable the development of specific study designs to gain insight into the spatial distribution of the risks posed by these vectors. The resulting information will serve as a basis for proposing and evaluating vector control measures

Temporal distribution of, and effect of anthropic modifications on, phlebotomine populations in the Chaco Bioregion, Argentina

“…The results suggest that sandfly populations in the Chaco region are closely linked to the presence of forest patches and barnyard animals in the peridomicile, which are probable natural breeding and resting sites (Parras et al., ). However, some species such as Mg. migonei , Ny.…”

Study on natural breeding sites of sand flies (Diptera: Phlebotominae) in areas of Leishmania transmission in Colombia

“…), which may contain larvae or pupae of these insects. For this reason, sampling and observation efforts must be exhaustive [ 12 , 13 , 21 , 25 , 26 ].…”

“…The emergence traps were placed within the roots, bases of trees and surfaces of different substrates for 15 days, performing an inspection every three days in order to appreciate the emergence of adults. These methodologies have been used and described previously [ 12 , 13 , 21 , 25 , 26 ].…”

“…This premise and the problems previously discussed have motivated new initiatives directed toward the study of immature stages of phlebotomines. Three recent studies in South America are particularly noteworthy: Alençar et al [ 21 ] and Sangiorgi et al [ 25 ], working in the Brazilian states of Amazonas and Bahia, respectively, found immature of Lutzomyia in the bases and roots of trees, while Parras et al [ 26 ] collected specimens from the base of a bromeliad and from other substrates close to areas used by wild canines, in a study of visceral leishmaniasis in Chaco province, Argentina [ 26 ]. Recently, Souza et al [ 27 ] found natural breeding sites of different species of sand flies on Marambaia Island (State of Rio de Janeiro) that participate in the transmission of leishmaniasis.…”

Larval habitats of sand flies in rural areas of southern Brazil

“…Investigations of sand fly habitats have employed methods of directly searching for immature forms and indirectly searching for newly emerged adults in the Old and New Worlds (Forattini , Rutledge and Ellenwood , Arias and Freitas , Killick‐Kendrick , Mutinga et al Casanova , Alencar , Singh et al Alencar et al Moncaz et al , Parras et al Sangiorgi et al …”