Presence and Persistence of Ebola or Marburg Virus in Patients and Survivors: A Rapid Systematic Review

Background: The 2013-15 Ebola outbreak was unprecedented due to sustainedtransmission within urban environments and thousands of survivors. In 2014 the World Health Organization stated that there was insufficient evidence to give definitive guidance about which body fluids are infectious and when they pose a risk to humans. We report a rapid systematic review of published evidence on the presence of filoviruses in body fluids of infected people and survivors. Methods: Scientific articles were screened for information about filovirus in human body fluids. The aim was to find primary data that suggested high likelihood of actively infectious filovirus in human body fluids (viral RNA). Eligible infections were from Marburg virus (MARV or RAVV) and Zaire, Sudan, Taï Forest and Bundibugyo species of Ebola. [1] Cause of infection had to be laboratory confirmed (in practice either tissue culture or RT-PCR tests), or evidenced by compatible clinical history with subsequent positivity for filovirus antibodies or inflammatory factors. Data were extracted and summarized narratively. Results: 6831 unique articles were found, and after screening, 33 studies were eligible. For most body fluid types there were insufficient patients to draw strong conclusions, and prevalence of positivity was highly variable. Body fluids taken >16 days after onset were usually negative. In the six studies that used both assay methods RT-PCR tests for filovirus RNA gave positive results about 4 times more often than tissue culture. Conclusions: Filovirus was reported in most types of body fluid, but not in every sample from every otherwise confirmed patient. Apart from semen, most non-blood, RT-PCR positive samples are likely to be culture negative and so possibly of low infectious risk. Nevertheless, it is not apparent how relatively infectious many body fluids are during or after illness, even when culture-positive, not least because most test results come from more severe cases. Contact with blood and blood-stained body fluids remains the major risk for disease transmission because of the known high viral loads in blood

Changing Patterns of Microhabitat Utilization by the Threespot Damselfish, Stegastes planifrons, on Caribbean Reefs

Background: The threespot damselfish, Stegastes planifrons (Cuvier), is important in mediating interactions among corals, algae, and herbivores on Caribbean coral reefs. The preferred microhabitat of S. planifrons is thickets of the branching staghorn coral Acropora cervicornis. Within the past few decades, mass mortality of A. cervicornis from white-band disease and other factors has rendered this coral a minor ecological component throughout most of its range. Methodology/Principal Findings: Survey data from Jamaica (heavily fished), Florida and the Bahamas (moderately fished), the Cayman Islands (lightly to moderately fished), and Belize (lightly fished) indicate that distributional patterns of S. planifrons are positively correlated with live coral cover and topographic complexity. Our results suggest that speciesspecific microhabitat preferences and the availability of topographically complex microhabitats are more important than the abundance of predatory fish as proximal controls on S. planifrons distribution and abundance. Conclusions/Significance: The loss of the primary microhabitat of S. planifrons—A. cervicornis—has forced a shift in the distribution and recruitment of these damselfish onto remaining high-structured corals, especially the Montastraea annulari

Analyzing antimicrobial resistance as a series of collective action problems

Publication status: PublishedAbstractAntimicrobial resistance (AMR) causes over 1.27 million deaths annually, making it one of today's most urgent health threats. Given its urgency, there are often calls for large‐scale global initiatives to address AMR. However, theories of collective action have yet to be applied to the problem in a systematic and holistic manner. Fuller engagement with collective action theory is necessary to avoid three risks, namely: mischaracterizing the kinds of challenges that AMR presents; over‐simplifying the problem by reducing it to a single type of collective action problem while ignoring others; and overstating the ability of collective action theory to formulate effective solutions. This article relies on the work of Elinor Ostrom to develop an analytical framework for collective action problems around public and common goods. When analyzed through this framework, we find that AMR poses at least nine distinct collective action problems. This more granular framing of AMR provides, in our view, a better basis to develop policy solutions to address this multifaceted challenge. We conclude with proposals for future research.</jats:p

Analyzing Antimicrobial Resistance as a Series of Collective Action Problems

Antimicrobial resistance (AMR) causes over 1.27 million deaths annually, making it one of today’s most urgent health threats. Given its urgency, there are often calls for large-scale global initiatives to address AMR. However, collective action theory has yet to be applied to the problem in a systematic and holistic manner. Fuller engagement with collective action theory is necessary to avoid three risks, namely: mischaracterizing the kinds of challenges that AMR presents; over-simplifying the problem by reducing it to a single type of collective action problem; and overstating the ability of collective action theory to formulate effective solutions. This article relies on the work of Elinor Ostrom to develop an analytical framework for collective action problems concerning public goods (non-excludable and non-rivalrous) and common goods (non-excludable and rivalrous). When analyzed through this framework, we find that AMR poses nine distinct collective action problems. This more granular framing of AMR provides, in our view, a better basis to develop policy solutions to address the multifaceted challenge of AMR. We conclude with proposals for future research