Malaria entomological inoculation rates in gold mining areas of Southern Venezuela

Moreno, José A.; Rubio-Palis, Yasmín; Páez, E.; Pérez, Enrique J. Martínez; Sánchez, Víctor Manuel Muñoz; Vaccari, Elena

doi:10.1590/s0074-02762009000500017

Cited by 26 publications

(29 citation statements)

References 27 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…marajoara also plays a significant role, together with An. darlingi, in malaria transmission in five localities in southern Venezuela [30][31]. In this gold mining region, where transmission is yearlong, the peak biting time, (19-21h, mostly before midnight), was comparable with most other reports of An.…”

Section: Venezuelasupporting

confidence: 79%

Phylogeography, Vectors and Transmission in Latin America

Conn¹,

Quiñónes²,

Póvoa³

2013

Anopheles Mosquitoes - New Insights Into Malaria Vectors

View full text Add to dashboard Cite

Section: Venezuelasupporting

confidence: 79%

Phylogeography, Vectors and Transmission in Latin America

Conn¹,

Quiñónes²,

Póvoa³

2013

Anopheles Mosquitoes - New Insights Into Malaria Vectors

View full text Add to dashboard Cite

“…darlingi comprising less than 50% of the mosquitoes collected in the majority of the localities surveyed in Brazil [15,34,36], which may suggest significant environmental differences. Studies from the Sifontes region of the Venezuelan Amazon and the Upper-Maroni Amazon region of French Guiana also report EIR values that are generally much lower than those reported in this study, while comparisons of human biting rates and sporozoite rates with these results vary by survey period [17,37]. In the Sifontes region of Venezuela, active vector control efforts at the time of collection were noted and mosquito collections were conducted indoors rather than outdoors, which may help account for the lower EIR values [37].…”

Section: Discussionmentioning

confidence: 47%

Hyperendemic malaria transmission in areas of occupation-related travel in the Peruvian Amazon

Parker

Olórtegui

Yori

et al. 2013

Malar J

View full text Add to dashboard Cite

BackgroundPlasmodium vivax and Plasmodium falciparum cause a significant illness burden in Peru. Anopheline indices for populated communities in the peri-Iquitos region of Loreto have been reported to be remarkably low, with entomological inoculation rates (EIR) estimated at one to 30 infective bites per year based on a few studies in close proximity to the urban centre of Iquitos and surrounding deforested areas. Local reports suggest that a large number of the reported cases are contracted outside of populated communities in undeveloped riverine areas frequented by loggers and fishermen.MethodsTo better understand vectorial capacity in suspected high malaria transmission zones in a rural district near Iquitos, Peru, mosquito collections were conducted at different points in the seasonality of malaria transmission in 21 sites frequented by occupational labourers. Prevalence of Plasmodium spp in vectors was determined by circumsporozoite protein ELISA on individual mosquitoes. Slide surveillance was performed for humans encountered in the zone.ResultsIn total, of 8,365 adult female mosquitoes examined, 98.5% were identified as Anopheles darlingi and 117 (1.4%) tested positive for sporozoites (P. falciparum, P. vivax VK210 or P. vivax VK247). Measured human biting rates at these sites ranged from 0.102 to 41.13 bites per person per hour, with EIR values as high as 5.3 infective bites per person per night. Six percent of the 284 blood films were positive for P. vivax or P. falciparum; however, 88% of the individuals found to be positive were asymptomatic at the time of sampling.ConclusionsThe results of this study provide key missing indices of prominent spatial and temporal heterogeneity of vectorial capacity in the Amazon Basin of Peru. The identification of a target human subpopulation as a principal reservoir and dispersion source of Plasmodium species has important implications for vaccine development and the delivery of effective targeted malaria control strategies.

show abstract

“…darlingi in CAP is similar to the EIR reported for An. darlingi in mining areas of southern Venezuela [81]. However, higher EIRs have been reported in forested areas of other Latin American countries where An.…”

Section: Discussionmentioning

confidence: 99%

Abundance, behavior and entomological inoculation rates of anthropophilic anophelines from a primary Colombian malaria endemic area

et al. 2013

View full text Add to dashboard Cite

BackgroundIn Colombia for several years, the Urabá-Bajo Cauca and Alto Sinú region has registered the highest numbers of malaria cases in the country. Malaria vector incrimination and the characterization of entomological parameters will allow for a better understanding of malaria transmission dynamics and the design of effective vector control strategies for this region.MethodsWe conducted a longitudinal survey between November 2008 and June 2010 to quantify entomological (abundance and biting activity) and transmission parameters, including infection rate (IR) and entomological inoculation rate (EIR), to incriminate potential anopheline vectors in three localities of a major Colombian malaria endemic region, the Urabá-Bajo Cauca and Alto Sinú: La Capilla, Juan Jose and El Loro.ResultsA total of 5,316 anopheline mosquitoes corresponding to seven species were collected. Anopheles nuneztovari (69.5%) and Anopheles darlingi (22.2%) were the most abundant species, followed by Anopheles pseudopunctipennis (4.5%), Anopheles albitarsis s.l. (2%), Anopheles triannulatus lineage Northwest (1.8%), Anopheles punctimacula and Anopheles argyritarsis (at < 1%, each). Three species were naturally infected with Plasmodium vivax, An. nuneztovari, An. darlingi (IRs < 1%) and An. triannulatus (IR = 1.5%). Annual EIRs for these species ranged from 3.5 to 4.8 infective bites per year.ConclusionsThese results indicate that An. nuneztovari and An. darlingi continue to be the most important malaria vectors in this region. Anopheles triannulatus, a species of local importance in other South American countries was found naturally infected with Plasmodium vivax VK247; therefore, further work should be directed to understand if this species has a role in malaria transmission in this region.

show abstract

Malaria entomological inoculation rates in gold mining areas of Southern Venezuela

Cited by 26 publications

References 27 publications

Phylogeography, Vectors and Transmission in Latin America

Phylogeography, Vectors and Transmission in Latin America

Hyperendemic malaria transmission in areas of occupation-related travel in the Peruvian Amazon

Abundance, behavior and entomological inoculation rates of anthropophilic anophelines from a primary Colombian malaria endemic area

Contact Info

Product

Resources

About