Leishmania (Viannia) braziliensis in Migonemyia migonei and Cortelezzii complex (Diptera: Phlebotominae) from Chaco, Argentina.

ROSA, JUAN RAMÓN; MOYA, SOFÍA LORIÁN; SZELAG, ENRIQUE ALEJANDRO; QUINTANA, MARÍA GABRIELA; SALOMÓN, OSCAR DANIEL

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.

ACAD BRASILEIRA DE CIENCIAS

Lugar: Rio de Janeiro; Año: 2022 vol. 94 p. 1 - 8

0001-3765

Chaco province is included in Argentinean ecoregions with humantegumentary leishmaniasis case records. During 2012-2014 in Pampa del Indio town anecoepidemiological study was carried out including phlebotomine dynamics and itsnatural infection with Leishmania demonstrated by sand flies dissection, polymerasechain reaction and sequencing. The species recorded were: Migonemyia migonei(72.79%), Nyssomyia neivai (23.6%), Evandromyia cortelezzii (0.94%), Evandromyia sallesi(0.39%), Cortelezzii complex (1.61%), Evandromyia aldafalcaoae (0.05%), Psathyromyiabigeniculata (0.02%), Brumptomyia brumpti (0.6%) and Corumbaensis complex (0.01%).A total of 380 females sand flies (Cortelezzii complex, Mg. migonei and Ny. neivai)from peridomicile and extradomicile were individually dissected and no flagellateswere observed in the intestinal tract. Later, these females were arranged in 38 poolsfor molecular analyses and Leishmania braziliensis DNA was amplified in 3 pools witha minimum infection rate of the total females of 0.8%, while specific rates were 0.5%for the Cortelezzii complex and 1.5% for Mg. migonei. In conclusion, our results wouldstrengthen the hypothesis that, in the study area, these species are candidates to beincriminated as vectors, while further studies will be required to fulfill the criteria tocharacterize both species as proven vectors of Le. braziliensis.