| an outbreak of plasmodium vivax malaria in trinidad, w.i. | an outbreak of plasmodium vivax malaria occurred in trinidad some 25 years after a successful eradication programme. the 'index case' was infected while visiting perdaneles, venezuela, and was responsible for the renewal of malaria transmission by indigenous anopheles aquasalis mosquitoes in icacos, trinidad, w.i. nine cases (four females and five males) of p. vivax malaria were locally transmitted in icacos. most of the cases (70%) were in the 15-24 or 25-44 year age groups. in granville/chatha ... | 1992 | 1304699 |
| a polytene chromosome study of four populations of anopheles aquasalis from venezuela. | polytene chromosome studies were undertaken to elucidate taxonomic relationships among populations of anopheles aquasalis and a. emilianus in venezuela. four collection sites were chosen: two in sucre state (santa fe and guayana) where a. aquasalis (considered to be a. emilianus by gabaldón and escalante) is presumed to be the major regional vector of plasmodium vivax; and two in areas where no malaria transmission occurs (caño rico, aragua state, and puerto cabello, carabobo state). the chromos ... | 1992 | 1618392 |
| temporal and spatial patterns of malaria reinfection in northeastern venezuela. | we stratified the risk of malaria transmission (plasmodium vivax) in 35 villages along a coastal range in northeastern venezuela (51 km2) where the main vector is the mosquito anopheles aquasalis. after 20 years without local malaria transmission, reinfection of the entire area occurred from may to december 1985 by local (continuous) and jump (discontinuous) dispersal. epidemiologic, environmental, and vector variables were investigated with the aid of a geographic information system. risk facto ... | 1999 | 10586913 |
| identification of anopheles aquasalis as a possible vector of malaria in guyana, south america. | adult female mosquitoes were collected in mahdia, guyana, to determine the incidence of malaria in anopheles species found during the month of june 2000. centers for disease control miniature white (incandescent) light traps, model 512, and miniature black (ultraviolet) light traps, model 912, were used to capture female mosquitoes. numbers of mosquitoes collected were compared between white and black light traps and between traps set outside and inside of buildings. adult female anopheles mosqu ... | 2001 | 11993026 |
| [epidemiological aspects of a malaria focus in the districts of são luis, ma]. | the study was developed in the neighborhood of residencial paraíso, são luis, maranhão, brazil, from 1999 to 2001. the aim was to analyze the epidemiological aspects of malaria. the location is receptive and vulnerable to malaria. there were 129 cases. men from 20 to 29 years of age were most involved. plasmodium vivax was the agent of all cases and anopheles aquasalis was the vector. there was no evidence of transmission occurring outside of the houses. | 2005 | 15895185 |
| susceptibility of anopheles aquasalis and an. darlingi to plasmodium vivax vk210 and vk247. | the susceptibility of anopheles aquasalis (f3 generation) and an. darlingi (f1 generation) to plasmodium vivax circumsporozoite protein phenotypes from a limited number of blood samples of malaria patients in belém, state of pará, brazil, was examined a polymerase chain reaction was used to determine the p. vivax phenotypes in blood samples and the blood-fed infected mosquitoes were dissected and tested by elisa. in all patient infections, more infected an. aquasalis and an. darlingi were positi ... | 2006 | 17072460 |
| anopheles aquasalis infected by plasmodium vivax displays unique gene expression profiles when compared to other malaria vectors and plasmodia. | malaria affects 300 million people worldwide every year and is endemic in 22 countries in the americas where transmission occurs mainly in the amazon region. most malaria cases in the americas are caused by plasmodium vivax, a parasite that is almost impossible to cultivate in vitro, and anopheles aquasalis is an important malaria vector. understanding the interactions between this vector and its parasite will provide important information for development of disease control strategies. to this e ... | 2010 | 20339545 |
| the jak-stat pathway controls plasmodium vivax load in early stages of anopheles aquasalis infection. | malaria affects 300 million people worldwide every year and 450,000 in brazil. in coastal areas of brazil, the main malaria vector is anopheles aquasalis, and plasmodium vivax is responsible for the majority of malaria cases in the americas. insects possess a powerful immune system to combat infections. three pathways control the insect immune response: toll, imd, and jak-stat. here we analyze the immune role of the a. aquasalis jak-stat pathway after p. vivax infection. three genes, the transcr ... | 2011 | 22069502 |
| anopheles species composition explains differences in plasmodium transmission in la guajira, northern colombia. | malaria in la guajira, the most northern state of colombia, shows two different epidemiological patterns. malaria is endemic in the municipality of dibulla whereas in riohacha it is characterised by sporadic outbreaks. this study aimed to establish whether differences in transmission patterns could be attributed to different vector species. the most abundant adult female species were anopheles aquasalis, exclusive to riohacha, and anopheles darlingi, restricted to dibulla. anopheles mosquitoes w ... | 0 | 25411002 |
| an overview of malaria transmission from the perspective of amazon anopheles vectors. | in the americas, areas with a high risk of malaria transmission are mainly located in the amazon forest, which extends across nine countries. one keystone step to understanding the plasmodium life cycle in anopheles species from the amazon region is to obtain experimentally infected mosquito vectors. several attempts to colonise anopheles species have been conducted, but with only short-lived success or no success at all. in this review, we review the literature on malaria transmission from the ... | 2015 | 25742262 |
| characterization of a recent malaria outbreak in the autonomous indigenous region of guna yala, panama. | this study aims to describe the epidemiological and entomological factors associated with a recent malaria outbreak that occurred in 2012 in a socially marginalized population from guna yala comarca in panama. | 2015 | 26578076 |
| experimental plasmodium vivax infection of key anopheles species from the brazilian amazon. | anopheles darlingi is the major malaria vector in countries located in the amazon region. anopheles aquasalis and anopheles albitarsis s.l. are also proven vectors in this region. anopheles nuneztovari s.l. and anopheles triannulatus s.l. were found infected with plasmodium vivax; however, their status as vectors is not yet well defined. knowledge of susceptibility of amazon anopheline populations to plasmodium infection is necessary to better understand their vector capacity. laboratory coloniz ... | 2013 | 24359307 |
| the role of reactive oxygen species in anopheles aquasalis response to plasmodium vivax infection. | malaria affects millions of people worldwide and hundreds of thousands of people each year in brazil. the mosquito anopheles aquasalis is an important vector of plasmodium vivax, the main human malaria parasite in the americas. reactive oxygen species (ros) have been shown to have a role in insect innate immune responses as a potent pathogen-killing agent. we investigated the mechanisms of free radicals modulation after a. aquasalis infection with p. vivax. ros metabolism was evaluated in the ve ... | 2013 | 23441231 |
| expression of active trypsin-like serine peptidases in the midgut of sugar-feeding female anopheles aquasalis. | anopheles aquasalis is a dipteran of the family culicidae that is widely distributed in the coastal regions of south and central america. this species acts as a vector of plasmodium vivax, an important etiological agent of malaria, which represents a serious public health problem. in mosquitoes, trypsin-like serine proteases are important in blood meal digestion, immune responses and reproductive functions. the study of peptidases expressed in the mosquito midgut is essential to understanding th ... | 2015 | 26021986 |
| malaria in brazil: what happens outside the amazonian endemic region. | brazil, a country of continental proportions, presents three profiles of malaria transmission. the first and most important numerically, occurs inside the amazon. the amazon accounts for approximately 60% of the nation's territory and approximately 13% of the brazilian population. this region hosts 99.5% of the nation's malaria cases, which are predominantly caused by plasmodium vivax (i.e., 82% of cases in 2013). the second involves imported malaria, which corresponds to malaria cases acquired ... | 0 | 25185003 |
| transcriptome sequencing and developmental regulation of gene expression in anopheles aquasalis. | anopheles aquasalis is a major malaria vector in coastal areas of south and central america where it breeds preferentially in brackish water. this species is very susceptible to plasmodium vivax and it has been already incriminated as responsible vector in malaria outbreaks. there has been no high-throughput investigation into the sequencing of an. aquasalis genes, transcripts and proteins despite its epidemiological relevance. here we describe the sequencing, assembly and annotation of the an. ... | 2014 | 25033462 |