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Current vector control challenges in the fight against malaria in Brazil
Abstract In Brazil, malaria is an important public health problem first reported in 1560. Historically, fluctuations in malaria cases in Brazil are attributed to waves of economic development; construction of railroads, highways, and hydroelectric dams; and population displacement and land occupation policies. Vector control measures have been widely used with an important role in reducing malaria cases. In this review article, we reviewed the vector control measures established in the Brazilian territory and aspects associated with such measures for malaria. Although some vector control measures are routinely used in Braz...
Source: Revista da Sociedade Brasileira de Medicina Tropical - March 8, 2019 Category: Tropical Medicine Source Type: research

Molecular detection of Wolbachia pipientis in natural populations of sandfly vectors of Leishmania infantum in endemic areas: first detection in Lutzomyia longipalpis
Abstract A polymerase chain reaction‐based method was used to screen sandflies for infection with Wolbachia (Rickettsiales: Rickettsiaceae), an intracellular bacterial endosymbiont found in many arthropods and filarial hosts. Positive results were obtained in five of 200 field‐collected sandflies and were confirmed by sequencing. All sandflies were Lutzomyia longipalpis (Diptera: Psychodidae) captured in a region endemic for visceral leishmaniasis in Brazil. This is the first study to identify Wolbachia infection in this Lutzomyia species, which is the main vector of leishmaniasis in the study area. The low infection r...
Source: Medical and Veterinary Entomology - August 11, 2017 Category: Veterinary Research Authors: N. O. DA ROCHA, S. M. LAMBERT, A. G. DIAS ‐LIMA, F. S. JULIÃO, B. M. P. S. SOUZA Tags: Short Communication Source Type: research

Analysis of Amblyomma sculptum haplotypes in an area endemic for Brazilian spotted fever
In this study, the genetic diversity of A. sculptum populations in the state of Rio de Janeiro (RJ), Brazil, was investigated because genetic variability in tick populations may be related to vector competence. Samples of A. sculptum from 19 municipalities in 7 regions of RJ were subjected to DNA extraction, amplification and sequencing of D‐loop, cytochrome oxidase II and 12S rDNA mitochondrial genes. These sequences were used to map the genetic diversity of this tick. Amblyomma sculptum populations are genetically diverse in RJ, especially in the South Centre and Highland regions. Few unique haplotypes were observe...
Source: Medical and Veterinary Entomology - February 29, 2016 Category: Veterinary Research Authors: K. BITENCOURTH, C. M. VOLOCH, N. M. SERRA‐FREIRE, E. MACHADO‐FERREIRA, M. AMORIM, G. S. GAZÊTA Tags: Original Article Source Type: research