A viral disease transmitted to humans by mosquitoes of the genus Aedes, the dengue virus, is rampant in tropical and subtropical regions. Over the past two decades, the average annual number of cases of dengue haemorrhagic fever has risen,1 with a sixfold increase in incidence from 1990 to 2013.2 Dengue fever is now considered an epidemic in over 100 countries across America, Asia, Oceania, and Africa.3 In 2010, the World Health Organization (WHO) announced that the cases of hemorrhagic fever caused by dengue had increased spectacularly over the past few years.1

Burkina Faso is a West African nation that experienced a dengue epidemic in 20134 and again in 2016.5,6 Studies conducted in Burkina Faso have found that healthcare providers lack knowledge of dengue and few received training on non-malaria febrile diseases.7,8 The virus is often confused with malaria, as the symptoms of the two diseases are similar, but taking antimalarial drugs can worsen the condition of a patient with dengue fever. Therefore, there is an urgent need to raise awareness and improve knowledge in Burkina Faso about the management of non-malaria febrile diseases.7

Despite concerted efforts over decades, a gap remains between the production of scientific evidence and its use, both in Africa and around the world. This gap is attributed to a lack of timely access to relevant research by healthcare providers and decision-makers that would help guide their work.9,10 Another contributing factor is a lack of training in reading and critiquing scientific research, along with most research not being accessible in its traditional format (i.e. scientific journals) to the majority of practitioners and decision-makers.11

A recent resurgence of dengue in Burkina Faso12 calls for the implementation of responses that are quick, effective, easily accessible, and based on the most up-to-date information available.13 Digital interventions offer a possible solution,14,15 which can contribute to health promotion, disease prevention, and health education.4,16 Referred to as eHealth technologies, Information Technology or Information and Communication Technologies (ICTs),14,15 these interventions have demonstrated their potential to extend and intensify the delivery of medical treatments to thousands of patients in developing nations.15 Their use is considered one of the most important methods of improving the quality of services in these countries.17,18


The study presented in this article is a follow-up to an experiment that assessed video as a digital solution for transferring knowledge on dengue fever in Burkina Faso.13 The aim of that first study was to determine which narrative genre (journalistic, dramatisation, or computer graphics animation) was most effective in transmitting knowledge about dengue fever to health professionals. The goal was to influence their practice so that dengue fever cases could be better diagnosed and treated. This study identified which narrative elements (audio and visual) fostered knowledge transmission and retention. A video was produced, based on this evidence. This video was posted on a website in October 2017, and a link to the site was sent to all health workers in the country by the Ministry of Health. In four months, the video was viewed by 2,993 people, 910 of whom viewed it in its entirety. At the end of the video, participants were invited to answer a short survey and provide their contact details to participate in a qualitative interview. The objective was to learn what influence the video had on their practice. The tool developed by Boyko et al., 2011, based on the Theory of Planned Behaviour, inspired the development of the qualitative interview guide. Its goal was to understand the a) attitudes, b) subjective norms, and c) perceptions of control over the target behaviour. Twenty-one respondents were contacted; five were decision-makers, two were the heads of an NGOs, six were nurses, four were midwives, one a pharmacist and one a doctor. Twenty-one respondents were contacted, and interviews lasting 20 to 40 minutes were conducted by telephone and audio recorded. A single research professional, supervised by the principal investigator of the first study (CH), led the interviews. These audio files were imported into the qualitative data processing software NVivo© and partially transcribed. The comments collected were analysed using a thematic analysis method that made it possible to identify, group, and structure all the themes addressed in the interviews.19 Each theme was summarised to understand better the different names given to things, the participants’ reasoning, and the factors that influenced their perceptions. Next, the transcript analysis was submitted to a research professional and subjected to an interrater agreement.


Attitude. Participants’ reception to the video was unanimously positive. They experienced a sense of satisfaction and even elation after viewing it. The video was appreciated for the education it provided. Not only did it meet a need for information, but it also standardised the front-line medical approach. The video transmitted specific and concise information that increased their knowledge and understanding of dengue fever:

“I can say the video is short and specific. The key points are made briefly so it can be viewed without losing too much time and without becoming impatient and abandoning it.” (Midwife)

The positive assessment of the video was also based on the relevance of the message, which was considered essential given the dengue fever outbreaks. Participants greatly appreciated that the video was in French and clarified the terminology in current use. A midwife stated that the video led her to adopt appropriate terminology and to correct colleagues who are misusing it:

“We ourselves, the health workers, tended to say ‘palu-dingue’ [malaria-crazy]. So it was instrumental in changing that, and now I too correct anyone who says palu-dingue.” (Midwife)

Respondents’ attitudes were also strongly influenced by the epidemic context. Health workers have been worried since the 2013 dengue epidemic. The video could serve as a tool for raising awareness or alerting the medical community. Some reported having witnessed fatal cases of dengue fever, which made the epidemic more palpable and the desire to fight it more personal. A nurse highlighted the usefulness of the video at a time when the illness is progressing.

“The video was welcome. I received the video when dengue fever was at a very high level at the CMA [satellite medical centre] in Nouna. There were cases every day.” (Nurse)

The lessons learned, the summary format, the relevance of the message, and the epidemic context thus appeared to make respondents receptive to integrating the video’s content into their practice.

Subjective norms. Subjective norms suggest that the social environment can influence the individual’s behaviour and intention to act. For example, respondents expressed a strong sense of belonging to the health professional community by systematically sharing the video through social networks, thus encouraging others to integrate this knowledge. This was the case of a pharmacist who felt the need to share the video with his colleagues.

“Dengue fever is a disease of global concern. It was important for everyone to learn what this disease is, and if there are ways [to cope with it], everyone should adopt them for protection. It was with this in mind that I received the link and wanted to share it with my colleagues so everyone could become aware.” (Pharmacist)

The respondents did not view the reactions of their colleagues and superiors as hindering the use of the knowledge because they were confident those reactions would be positive.

Perception of control over one’s behaviour. Health workers’ perceptions of how much control they had over their behaviour influenced their intention to act. Respondents working in clinics all emphasised the healthcare provider’s autonomy. In their view, there was no restriction on applying scientific data, as long as the data were considered credible, which was the case with this video.

“The staff member is quite autonomous; he does not need third-party authorisation to be able to diagnose, because he is the one in charge, so there is nothing to worry about.” (District Medical Officer)

It should be noted that half the respondents indicated that the information in the video was in line with Ministry of Health guidelines, which reinforced its integration into their practice. However, only three of those respondents treated patients directly. As the rest were in management positions, it is to be expected that they would be more aware of national guidelines. The other half of respondents deplored the lack of information on dengue fever and its treatment. The video was likely to change practices:

“If things go well with the Ministry of Health, there is no problem putting this into practice. However, this year, we are not informed about dengue fever. That is what is making it difficult to manage dengue.” (Midwife)

“I think what is in the video does not contradict the directives we were given. It just reinforces what was issued by the Department of Diseases, so in my view, there should not be any problem as long as it complies with the national directives.” (Manager, evaluation follow-up)

The healthcare providers thus had the autonomy required to integrate new knowledge into their practice and affirmed that they had complete control over what they did in consultations.


Given the epidemic context, users welcomed the video enthusiastically. As recommended,20 the video was developed based on evidence to serve the training needs of health professionals in Burkina Faso. It aimed to influence their practice and increase the number of cases correctly diagnosed as dengue fever.

Their positive attitude towards the video fostered respondents’ intention to use the knowledge it presented. This attitude was mainly influenced by the video relaying specific and concise information, transmitting a relevant message in everyday language, and responding to the crisis context. Subjective norms did not appear to play a significant role in the intention to use knowledge. Their perception of control over their behaviour was affected by the national dengue fever management guidelines. However, these guidelines were unknown to half the respondents.

A careful analysis of intervention studies shows that simply disseminating written guidelines is relatively ineffective in increasing the performance of health workers compared to digital solutions.21 Therefore, digital solutions offer an increasingly popular alternative for training health workers in Africa.15,16 Among the many benefits of digital interventions are 1) increased access to health care and health information, 2) greater efficacy and a lower cost of service delivery, 3) timely access to information, and 4) expanding access to continuing medical education and training for health workers.22

The current study demonstrates that the use of video as a digital intervention met the expectations and training needs of the health workers surveyed. Future research should explore the impact of technology when more broadly used and disseminated,13 for example, using mobile devices (e.g. cell phones, tablets). These simple, accessible, and ubiquitous devices are already part of the daily life of health workers and community service providers in low- and medium-income countries,13,23–27 and may support various health practices such as data collection, service delivery, and patient adherence to recommendations.16,24 These technologies should be developed rapidly16 and their use supported in Africa.


Using video as a knowledge transfer tool is an effective and efficient way to update health workers’ knowledge and influence their practices. Respondents received the video enthusiastically because of the epidemic context, which required fast, effective, and evidence-based actions. Therefore, it is essential to test video as a tool to transfer knowledge and change health workers practices in the context of other health crises .


The authors would like to thank Ahmed Sie Barro and the participants who agreed to answer our questions.

This study was approved by the health research ethics committees of the Government of Burkina Faso (decision no. 2015/10/06) and of the University of Montreal Hospital Research Centre (decision no. 15–190). Participants’ consent was obtained orally.


VR. ROH-115213; Community research studies and interventions for health equity in Burkina Faso
VR. DC0190GP; Planning and Dissemination Grant– Institute Community Support
Supported by the Canadian Institute of Health Research.

Authorship contributions

CD conducted the research and investigation processes. He prepared and wrote the manuscript.
CH contributed to the collection and analysis of data and the revision of the different versions of the manuscript.
VR participated in the formulation of the project and the revision of the different versions of the manuscript. He participated in obtaining financial support for the project.

Competing interests

The authors completed the Unified Competing Interest form at http://www.icmje.org/disclosure-of-interest/ (available upon request from the corresponding author) and declare no conflicts of interest.

Correspondence to:

Professor Christian Dagenais, Ph.D.

Full Professor, Psychology Department

University of Montreal

Pavillon Marie-Victorin, Bureau C-355

Montréal, Québec, H3C 3J7


Principal Investigator, Équipe RENARD