Impacts of Hurricanes Irma and Maria on Aedes aegypti Populations, Aquatic Habitats, and Mosquito Infections with Dengue, Chikungunya, and Zika Viruses in Puerto Rico.

Impacts of Hurricanes Irma and Maria on Aedes aegypti Populations, Aquatic Habitats, and Mosquito Infections with Dengue, Chikungunya, and Zika Viruses in Puerto Rico. Am J Trop Med Hyg. 2019 Apr 08;: Authors: Barrera R, Felix G, Acevedo V, Amador M, Rodriguez D, Rivera L, Gonzalez O, Nazario N, Ortiz M, Muñoz JL, Waterman S, Hemme RR Abstract Puerto Rico was severely impacted by Hurricanes Irma and Maria in September 2017. The island has been endemic for dengue viruses (DENV) and recently suffered epidemics of chikungunya (CHIKV 2014) and Zika (ZIKV 2016) viruses. Although severe storms tend to increase the number of vector and nuisance mosquitoes, we do not know how they influence Aedes aegypti populations and arboviral transmission. We compared the abundance of female Ae. aegypti in autocidal gravid ovitraps (AGO traps), container habitats, and presence of RNA of DENV, CHIKV, and ZIKV in this vector before and after the hurricanes in Caguas city and in four communities in southern Puerto Rico. Two of these communities were under vector control using mass AGO trapping and the other two nearby communities were not. We also investigated mosquito species composition and relative abundance (females/trap) using BG-2 traps in 59 sites in metropolitan San Juan city after the hurricanes. Mosquitoes sharply increased 5 weeks after Hurricane Maria. Ensuing abundance of Ae. aegypti was higher in Caguas and in one of the southern communities without vector ...
Source: The American Journal of Tropical Medicine and Hygiene - Category: Tropical Medicine Authors: Tags: Am J Trop Med Hyg Source Type: research

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Conclusion and Perspectives Arbovirus infections, such as CHIKV, have been growing worldwide and are becoming a major public health problem, especially in immuno-compromised classes such as children and the elderly. CHIKV is dangerous since it can cause arthritis, fever and other impairments, making it necessary to seek new ways to counter the proliferation of this virus. Knowing the vector’s competence is fundamentally important, including an understanding of the vector virus interaction and the modulation of this interaction. Despite advances in the knowledge of mosquito competence in the transmission of CHIKV, li...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
In this study, we were able to demonstrate that our measure for mosquito-borne viral suitability is informative in the context of Myanmar, despite the lack of ento-epidemiological datasets with high spatio-temporal resolution. By estimating suitability through climate variables and known ento-epidemiological parameters, we were able to project mosquito-born virus (MBV) suitability at the district level, a resolution for which epidemiological data and mosquito abundance measures are not generally available. Here, we discuss the national and subnational public health and control implications for MBVs in the context of our pr...
Source: PLOS Currents Outbreaks - Category: Epidemiology Authors: Source Type: research
DAVID E. BLOOM is the Clarence James Gamble Professor of Economics and Demography, DANIEL CADARETTE is a research assistant, and JP SEVILLA is a research associate, all at Harvard University’s T.H. Chan School of Public Health.By David E. Bloom, Daniel Cadarette and JP SevillaWASHINGTON DC, Jul 3 2018 (IPS)Infectious diseases and associated mortality have abated, but they remain a significant threat throughout the world.We continue to fight both old pathogens, such as the plague, that have troubled humanity for millennia and new pathogens, such as human immunodeficiency virus (HIV), that have mutated or spilled over ...
Source: IPS Inter Press Service - Health - Category: International Medicine & Public Health Authors: Tags: Active Citizens Development & Aid Economy & Trade Global Headlines Health TerraViva United Nations Source Type: news
ConclusionsUsing a detailed agent-based dengue transmission model for Yucat án State, Mexico, we predict that high coverage indoor residual spraying (IRS) interventions can largely eliminate transmission for a few years, when applied a few months before the typical seasonal epidemic peak. However, vector control succeeds by preventing infections, which precludes natural im munization. Thus, as a population benefits from mosquito control, it gradually loses naturally acquired herd immunity, and the control effectiveness declines; this occurs across all of our modeled scenarios, and is consistent with other empirical ...
Source: PLoS Neglected Tropical Diseases - Category: Tropical Medicine Authors: Source Type: research
In conclusion, the old literature on arboviruses in Mozambique is relevant for assessing the gaps and current risk of occurrence of these pathogens at the region, particularly in a time in which they are spreading worldwide. PMID: 29845522 [PubMed - in process]
Source: Advances in Experimental Medicine and Biology - Category: Research Tags: Adv Exp Med Biol Source Type: research
CONCLUSIONS AND IMPLICATIONS FOR PUBLIC HEALTH PRACTICE: Vectorborne diseases are a large and growing public health problem in the United States, characterized by geographic specificity and frequent pathogen emergence and introduction. Differences in distribution and transmission dynamics of tickborne and mosquitoborne diseases are often rooted in biologic differences of the vectors. To effectively reduce transmission and respond to outbreaks will require major national improvement of surveillance, diagnostics, reporting, and vector control, as well as new tools, including vaccines. PMID: 29723166 [PubMed - in process]
Source: MMWR Morb Mortal Wkl... - Category: Epidemiology Authors: Tags: MMWR Morb Mortal Wkly Rep Source Type: research
This study accessed the patients information on demographic characteristics, physical signs and symptoms. Study population This is a cross-sectional and observational study carried out in Brazil during DENV and ZIKV epidemic occurred in 2016. Patients were assisted at the Healthy Unit UPA Coronel Antonino in Campo Grande, MS, Brazil from February to March of 2016. During the study 134 suspected arboviral infection cases were included and submitted to investigation. Patients presenting fever, rash during acute phase of infection (up to the 7th day after disease onset) followed by at least two of the following signals a...
Source: PLOS Currents Outbreaks - Category: Epidemiology Authors: Source Type: research
In this study we explore the potential for autochthonous, but not necessarily sustained, transmission of CHIKV in Canada. We used a stochastic mathematical model parameterized for Ae. albopictus under climatic conditions in the warmest months of the year in locations across Canada. We then combined the climatic suitability for CHIKV transmission potential in the warmest months of the year (condition C4) with climatic suitability indicators for the endemic presence of Ae. albopictus (condition C3) to produce risk maps identifying areas in Canada most suitable for autochthonous CHIKV transmission under recent and projected c...
Source: EHP Research - Category: Environmental Health Authors: Tags: Research Source Type: research
The objective of this study was to evaluate a predictive model of West Nile virus in South Dakota (SD), which was used to make whole-year forecasts at the beginning of the 2016 WNV season, as well as short-term weekly forecasts throughout the season. This modeling approach was unique in that it incorporated not only weather data but also WNV infection data to predict spatial and temporal patterns of WNV cases. Because the model was specified and parameterized prior to the start of the 2016 WNV season, this exercise provided an opportunity to make a priori predictions and then validate them using independent data. The model...
Source: PLOS Currents Outbreaks - Category: Epidemiology Authors: Source Type: research
We report the results of a rapid assessment of Zika virus awareness among key clinical specialties in Singapore, with the aim of identifying gaps in knowledge and opportunities for improving communication on Zika virus disease management and control policies. Methods Study Participants and Sites Between June 6 and June 19, 2016 prior to the Zika virus outbreak, we conducted an online survey of doctors working in obstetrics and gynaecology, neonatology and paediatrics in Singapore. A link to the online survey was disseminated by email to the relevant doctors at KK women’s and Children’s Hospital and Singapo...
Source: PLOS Currents Outbreaks - Category: Epidemiology Authors: Source Type: research
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