Dengue virus and Zika virus alter endoplasmic reticulum-mitochondria contact sites to regulate respiration and apoptosis.

During infection, dengue virus (DENV) and Zika virus (ZIKV), two (ortho)flaviviruses of public health concern worldwide, induce alterations of mitochondria morphology to favor viral replication, suggesting a viral co-opting of mitochondria functions. Here, we performed an extensive transmission electron microscopy-based quantitative analysis to demonstrate that both DENV and ZIKV alter endoplasmic reticulum-mitochondria contact sites (ERMC). This correlated at the molecular level with an impairment of ERMC tethering protein complexes located at the surface of both organelles.

Sofosbuvir as post-exposure prophylaxis for yellow fever-associated viscerotropic disease (YEL-AVD).

Objectives: Yellow fever-associated viscerotropic disease (YEL-AVD) is a rare but serious complication arising from administration of live-attenuated yellow fever vaccine to individuals with risk factors such as thymectomy. At present there is no evidence-based treatment, and case fatality rates are high. Sofosbuvir, an NS5B nucleotide inhibitor, has activity against yellow fever virus in vitro and in vivo.

Spatial and temporal activity patterns of Amblyomma americanum.

Background: Estimates of tick abundance and distribution are used to determine the risk of tick-host contact. Tick surveys provide estimates of distributions and relative abundance for species that remain stationary and wait for passing hosts (i.e.