‘Super Mosquito’ Resistant to Malaria Insecticide Found in Mali

Interbreeding between two mosquito species has created a new “super” species that is resistant to bed nets treated with malaria insecticide, a new study has found. The species has been found in the West African country of Mali and, according to research published in the journal Proceedings of the National Academy of Sciences, is a result of an evolutionary change caused by the introduction of the treated nets to the environment. The treated nets have been credited with helping reduce the number of malaria deaths over the past decade. The World Health Organization reports deaths have decreased by 47 percent since 2000. According to a press release from the University of California at Davis, specialists were not surprised by the emergence of an insecticide resistant species. “Growing resistance has been observed for some time,” said lead researcher and medical entomologist Gregory Lanzaro in the release. “Recently it has reached a level at some localities in Africa where it is resulting in the failure of the nets to provide meaningful control, and it is my opinion that this will increase.” The scientists are urging the development of “new and effective malaria vector control strategies.” Read next: How To Stop Chikungunya Listen to the most important stories of the day.
Source: TIME.com: Top Science and Health Stories - Category: Consumer Health News Authors: Tags: Uncategorized Infectious Disease Insects Source Type: news

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Abstract Mosquitoes spread several life-threatening diseases such as malaria, filaria, dengue, Japanese encephalitis, West Nile fever, chikungunya, and yellow fever and are associated with millions of deaths every year across the world. However, insecticides of synthetic origin are conventionally used for controlling various vector-borne diseases but they have various associated drawbacks like impact on non-targeted species, negative effects on the environment, and development of resistance in vector species by alteration of the target site. Plant extracts, phytochemicals, and their nanoformulations can serve as o...
Source: Environmental Science and Pollution Research International - Category: Environmental Health Authors: Tags: Environ Sci Pollut Res Int Source Type: research
Abstract Despite centuries of enormous control efforts, mosquito-borne diseases continue to show upward trend of morbidity. According to WHO reports, malaria caused 438000 deaths in the year 2015 and dengue cases has been increased 30-fold over the last five decades. To control these diseases, it is necessary to understand the transmission dynamics of them among mosquitoes. There are some vertically transmitted mosquito-borne diseases which can also be spread among mosquitoes through sexual contact (e.g., dengue, zika, chikungunya). Recent experimental observations indicate that for virus persistence in mosquito p...
Source: Mathematical Biosciences - Category: Statistics Authors: Tags: Math Biosci Source Type: research
Abstract Given the continued high prevalence of mosquito-transmitted diseases there is a clear need to develop novel disease and vector control strategies. Biopesticides of microbial origin represent a promising source of new approaches to target disease transmitting mosquito populations. Here we describe the development and characterization of a novel mosquito biopesticide, derived from an air-dried, non-live preparation of the bacterium Chromobacterium sp. Panama (Family: Neisseriaceae). This preparation rapidly and effectively kills the larvae of prominent mosquito vectors, including the dengue and Zika vector ...
Source: Applied and Environmental Microbiology - Category: Microbiology Authors: Tags: Appl Environ Microbiol Source Type: research
ior E Abstract The incidence of dengue, Zika, chikungunya, yellow fever and malaria cases has increased significantly in the world. To avoid mosquito bites, one of the best strategies is the use of repellents. The interest in using plants as mosquito repellents has increased significantly. In this review, has been performed a bibliographic survey of the plants with repellent activity, evaluate the trends of natural repellent formulations in the scientific literature, those described in patents and commercially available products. Limonene, 1,8-cineole, geraniol, eugenol and citronellal are the active compounds tha...
Source: Acta Tropica - Category: Infectious Diseases Authors: Tags: Acta Trop Source Type: research
Conclusions/SignificanceViroTrack Dengue Acute is a sensitive and specific assay for DENV NS1 detection. It provides faster results than the ELISA method and a better performance than the rapid immunochromatographic tests. ViroTrack Dengue Acute could represent a valuable tool for rapid diagnosis of DENV infections in returning travellers from endemic countries.
Source: PLoS Neglected Tropical Diseases - Category: Tropical Medicine Authors: Source Type: research
Abstract Mosquitoes are principal vector of several vector-borne diseases affecting human beings leading to thousands of deaths per year and responsible for transmitting diseases like malaria, dengue, chikungunya, yellow fever, Zika virus, Japanese encephalitis, and lymphatic filariasis. In the present study, we evaluated the different solvent extracts of mangrove Avicennia marina for their toxicity against larvae of three major mosquito vectors, as well as selected microbial pathogens. The larvicidal mortality of third instars was observed after 24 h. Highest larval mortality was found for the acetone extrac...
Source: Environmental Science and Pollution Research International - Category: Environmental Health Authors: Tags: Environ Sci Pollut Res Int Source Type: research
This study determined seroprevalence of active and past CHIKV infection among febrile patients who tested negative for malaria and typhoid fever. Sera from 243 febrile patients were screened for CHIKV IgG and IgM using an immunochromatographic test kit. Clinical and socio-demographic variables were collected using a structured questionnaire. Recent CHIKV infection was observed in 5.8% of the study participants while 25.1% had IgG antibodies demonstrating previous infection. Significant associations were observed between seropositivity and age of participants (p 
Source: The Brazilian Journal of Infectious Diseases - Category: Infectious Diseases Source Type: research
This study determined seroprevalence of active and past CHIKV infection among febrile patients who tested negative for malaria and typhoid fever. Sera from 243 febrile patients were screened for CHIKV IgG and IgM using an immunochromatographic test kit. Clinical and socio-demographic variables were collected using a structured questionnaire. Recent CHIKV infection was observed in 5.8% of the study participants while 25.1% had IgG antibodies demonstrating previous infection. Significant associations were observed between seropositivity and age of participants (p 
Source: Braz J Infect Dis - Category: Infectious Diseases Authors: Tags: Braz J Infect Dis Source Type: research
[Government of Mauritius] 'An inter-sectoral collaboration is key to control and prevent the outbreak of vector-borne diseases such as malaria, dengue and chikungunya, in particular during the currently prevailing cyclonic and rainy season'.
Source: AllAfrica News: Health and Medicine - Category: African Health Source Type: news
[Radio Dabanga] Khartoum -More than 1.8 million cases of malaria were reported from across Sudan so far in 2019, a sharp increase compared to previous years, the UN Office for the Coordination of Humanitarian Affairs (OCHA) reported on Thursday. Cases of diphtheria, dengue fever, rift valley fever, chikungunya, and cholera continue to be recorded across the country, according to the Sudanese Ministry of Health.
Source: AllAfrica News: Health and Medicine - Category: African Health Source Type: news
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