With this World Health Day, WHO is drawing attention to a group of diseases that are spread by insects and other vectors, the heavy health and economic burdens they impose, and what needs to be done to reduce these burdens. Many of these diseases have been historically confined to distinct geographi...cal areas, but this situation has become more fluid due to a host of ills, including climate change, intensive farming, dams, irrigation, deforestation, population movements, rapid unplanned urbanization, and phenomenal increases in international travel and trade. The control of vector-borne diseases can make a major contribution to poverty reduction, as it precisely targets the poor
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Armed Forces Pest Management Board Technical Guide No. 47
Verfügbar in Deutsch, Französisch, Italienisch und Englisch
Esta publicación tiene como objetivo fundamental, presentar en lenguaje claro y objetivo, informaciones actualizadas sobre las formas de transmisión de la
enfermedad, sus vectores, su ciclo biológico y métodos de control. Su contenido
se dirige, principalmente, a los técnicos y profesionales ...brasileños que actúan en
el control y en la vigilancia de los vectores de la enfermedad de Chagas y por otro
lado, también a personas que no están familiarizadas con el tema. Entretanto, el
lenguaje simple y objetivo adoptado permite que la obra también pueda ser utilizada
por personas que no están familiarizadas con el asunto.
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This review focusses on the interactions between the etiologic agent of Chagas disease, Trypanosoma cruzi, and its triatomine vector. The flagellate mainly colonizes the intestinal tract of the insect. The effect of triatomines on trypanosomes is indicated by susceptibility and refractoriness phenom...ena that vary according to the combination of the strains. Other effects are apparent in the different regions of the gut. In the stomach, the majority of ingested blood trypomastigotes are killed while the remaining transform to round stages. In the small intestine, these develop into epimastigotes, the main replicative stage. In the rectum, the population density is the highest and is where the infectious stage develops, the metacyclic trypomastigote. In all regions of the gut, starvation and feeding of the triatomine affect T. cruzi. In the small intestine and rectum, starvation reduces the population density and more spheromastigotes develop. In the rectum, feeding after short-term starvation induces metacyclogenesis and after long-term starvation the development of specific cells, containing several nuclei, kinetoplasts and flagella. When considering the effects of T. cruzi on triatomines, the flagellate seems to be of low pathogenicity. However, during stressful periods, which are normal in natural populations, effects occur often on the behaviour, eg, in readiness to approach the host, the period of time before defecation, dispersal and aggregation. In nymphs, the duration of the different instars and the mortality rates increase, but this seems to be induced by repeated infections or blood quality by the feeding on infected hosts. Starvation resistance is often reduced by infection. Longevity and reproduction of adults is reduced, but only after infection with some strains of T. cruzi. Only components of the surface coat of blood trypomastigotes induce an immune reaction. However, this seems to act against gut bacteria and favours the development of T. cruzi.
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Lancet Infect Dis. 2019 Feb 21. pii: S1473-3099(18)30757-6. doi: 10.1016/S1473-3099(18)30757-6
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The Lancet. Published Online December 22, 2016 http://dx.doi.org/10.1016/S0140-6736(16)32621-6. Open Access
the Lancet : Published Online July 31, 2015 http://dx.doi.org/10.1016/S0140-6736(15)61117-5
INFO Zur Schutzimpfung gegen COVID-19 (Corona Virus Disease 2019)–mit Vektor-Impfstoff –
Published:February 02, 2021DOI:https://doi.org/10.1016/S0140-6736(21)00234-8
Effective malaria prevention is threatened by widespread and increasing vector insecticide resistance. Failure to mitigate this threat will likely result in an increased burden of disease, with significant cost implications. This new framework provides support for the development of a national insec...ticide resistance monitoring and management plan as part of a national malaria strategic plan.
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