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What makes or breaks a campaign to stop an invading plant pathogen?

ABSTRACT: Diseases in humans, animals and plants remain an important challenge in our society. Effective control of invasive pathogens often requires coordinated concerted action of a large group of stakeholders. Both epidemiological and human behavioural factors influence the outcome of a disease control campaign. In mathematical models that are frequently used to guide such campaigns, human behaviour is often ill-represented, if at all. Existing models of human, animal and plant disease that do incorporate participation or compliance are often driven by pay-offs or direct observations of the disease state. It is however very well known that opinion is an important driving factor of human decision making. Here we consider the case study of Citrus Huanglongbing disease (HLB), which is an acute bacterial disease that threatens the sustainability of citrus production across the world. We show how by coupling an epidemiological model of this invasive disease with an opinion dynamics model we are able to answer the question: What makes or breaks the effectiveness of a disease control campaign? Frequent contact between stakeholders and advisors is shown to increase the probability of successful control. More surprisingly, we show that informing stakeholders about the effectiveness of control methods is of much greater importance than prematurely increasing their perceptions of the risk of infection. We discuss the overarching consequences of this finding and the effect on human as well as plant disease epidemics.

SUBMITTER: Milne AE

PROVIDER: S-EPMC7004315 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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What makes or breaks a campaign to stop an invading plant pathogen?

Milne Alice E AE Gottwald Tim T Parnell Stephen R SR Alonso Chavez Vasthi V van den Bosch Frank F

PLoS computational biology 20200206 2

Diseases in humans, animals and plants remain an important challenge in our society. Effective control of invasive pathogens often requires coordinated concerted action of a large group of stakeholders. Both epidemiological and human behavioural factors influence the outcome of a disease control campaign. In mathematical models that are frequently used to guide such campaigns, human behaviour is often ill-represented, if at all. Existing models of human, animal and plant disease that do incorpor ...[more]

PMID: 32027649

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Project description:BackgroundIt has been argued that the alcohol industry uses corporate social responsibility activities to influence policy and undermine public health, and that every opportunity should be taken to scrutinise such activities. This study analyses a controversial Diageo-funded 'responsible drinking' campaign ("Stop out of Control Drinking", or SOOCD) in Ireland. The study aims to identify how the campaign and its advisory board members frame and define (i) alcohol-related harms, and their causes, and (ii) possible solutions.MethodsDocumentary analysis of SOOCD campaign material. This includes newspaper articles (n = 9), media interviews (n = 11), Facebook posts (n = 92), and Tweets (n = 340) produced by the campaign and by board members. All material was coded inductively, and a thematic analysis undertaken, with codes aggregated into sub-themes.ResultsThe SOOCD campaign utilises vague or self-defined concepts of 'out of control' and 'moderate' drinking, tending to present alcohol problems as behavioural rather than health issues. These are also unquantified with respect to actual drinking levels. It emphasises alcohol-related antisocial behaviour among young people, particularly young women. In discussing solutions to alcohol-related problems, it focuses on public opinion rather than on scientific evidence, and on educational approaches and information provision, misrepresenting these as effective. "Moderate drinking" is presented as a behavioural issue ("negative drinking behaviours"), rather than as a health issue.ConclusionsThe 'Stop Out of Control Drinking' campaign frames alcohol problems and solutions in ways unfavourable to public health, and closely reflects other Diageo Corporate Social Responsibility (CSR) activity, as well as alcohol and tobacco industry strategies more generally. This framing, and in particular the framing of alcohol harms as a behavioural issue, with the implication that consumption should be guided only by self-defined limits, may not have been recognised by all board members. It suggests a need for awareness-raising efforts among the public, third sector and policymakers about alcohol industry strategies.

Project description:New invading pathogen strains must compete with endemic pathogen strains to emerge and spread. As disease control measures are often non-specific, that is, they do not distinguish between strains, applying control not only affects the invading pathogen strain but the endemic as well. We hypothesize that the control of the invasive strain could be compromised due to the non-specific nature of the control.A spatially explicit model, describing the East African cassava mosaic virus-Uganda strain (EACMV-UG) outbreak, is used to evaluate methods of controlling both disease incidence and spread of invading pathogen strains in pathosystems with and without an endemic pathogen strain present.We find that while many newly introduced or intensified control measures (such as resistant cultivars or roguing) decrease the expected incidence, they have the unintended consequence of increasing, or at least not reducing, the speed with which the invasive pathogen spreads geographically. We identify the controls that cause this effect and methods in which these controls may be applied to prevent it.We found that the spatial spread of the invading strain is chiefly governed by the incidence at the wave front. Control can therefore be applied, or intensified, once the wave front has passed without increasing the pathogen's rate of spread.When trade of planting material occurs, it is possible that the planting material is already infected. The only forms of control in this study that reduces the speed of geographic spread, regardless of the presence of an endemic strain, are those that reduce the amount of trade and the distance over which trade takes place. Synthesis and applications. The best control strategy depends on the presence of competing endemic strains. Applying or intensifying the control can slow the rate of spread when absent but increase it if present. Imposing trade restrictions before the epidemic has reached a given area and intensifying other control methods only when the wave front has passed is the most effective way of both slowing down spread and controlling incidence when a competing endemic strain is present and is the safest approach when its presence is unknown.

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Project description:When the Fun Stops, Stop, is a prominent 'responsible gambling' campaign in the UK, originally funded and delivered by the industry-initiated and funded Senet Group. Since the Senet Group's dissolution in 2020, the campaign has been overseen by the Betting and Gambling Council (BGC), the main gambling industry trade body. There has been no prior analysis of the activities, ideas and framing adopted by the Senet Group, who claimed to be acting as an industry 'watchdog' and oversaw what they characterised as a major public education campaign. We collated written and image-based material related to the Senet Group and its When the Fun Stops, Stop campaign from multiple sources. Guided by Entman's four functions of framing, we analysed the Senet Group's framing of the issues it sought to address, particularly harmful gambling, as well as its causes, and the solutions, focusing on the group's main activity: the delivery of the When the Fun Stops, Stop campaign. We also critically appraised an evaluation of the campaign funded by the Senet Group, using the findings to interrogate the stated claims about the campaign's effectiveness. The analysis showed that the Senet Group's framing of the problem, its causes, and proposed responses resemble those adopted by other industries and industry-funded groups. This involves portraying any harms caused by their products as limited to an atypical minority, rejecting upstream determinants of harm, and promoting individually-targeted voluntary measures, all contrary to the evidence of what works in health promotion, and what would characterise a public health approach. Neither the existing evidence base nor the evidence presented by the Senet Group support their claims about the campaign's effectiveness. These findings add to concerns about industry-funded campaigns in other areas. To minimise conflicts of interest, interventions intended to address gambling-related harms, such as public education campaigns, should be evidence-based and developed, implemented and evaluated completely independent of the industry and industry-funded organisations.

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What makes or breaks a campaign to stop an invading plant pathogen?

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What makes or breaks a campaign to stop an invading plant pathogen?

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