This blog post is a guest blog from Aimee-Louise Whalley who is undertaking a MSc at the Liverpool School of Tropical Medicine. 

After completing my undergraduate degree, I was a little lost and unsure of what was next! I had worked and travelled but found myself eager to study biology again, in a field that made a huge difference to people’s lives. During my master’s degree in Tropical Disease Biology at the Liverpool School of Tropical Medicine (LSTM) I developed an interest in vector control and chose to carry out my research project with IVCC. The project was investigating the role of surface type in Indoor Residual Spraying (IRS).

In 2018, there were 228 million cases of malaria globally, 405,000 of which resulted in death. Despite increasing our knowledge and advancements in technology for combatting malaria, and other vector-borne diseases, new control tools must be developed, and existing tools must be improved if we want to reach eradication. IRS is one such control tool, which involves the coating of internal walls and other surfaces with a residual insecticide. Previous studies have shown variation in IRS performance across sprayed surface types, with suggestions that porous surfaces like mud and dung are particularly poor for insecticide persistence. Mud is a common housing material in sub-Saharan Africa, where malaria is most present. If the role of surface type is understood further and investment is made into overcoming the challenges IRS faces, more effective IRS application can be achieved. This could result in prevented disease and lives saved.

The initial idea for my MSc project was to conduct bioassays on mud brick samples taken from several countries across Africa. This would help identify the physicochemical properties that may be responsible for the residual efficacy of sprayed insecticide on the different muds. As the COVID-19 pandemic disrupted all of our lives, laboratory research plans were halted, and the scope of the research had to change. During my project I conducted a review of the literature, to summarise the existing knowledge on the differences in residual efficacy seen between common surface types (for example dung, mud, cement, wood and paint), and on surface-insecticide interactions that influence residual efficacy. Following that, I looked at three IVCC laboratory data sets to observe any variability in residual efficacy between and within surface types. The results found that porous surfaces like mud and dung surfaces showed the shortest and most varied residual efficacies compared to less porous surfaces like wood and paint.

Mud varies in composition and can vary across geographical location. The physicochemical analysis of seven mud brick samples across geographies were used to identify the properties that influence insecticide persistence. A positive correlation was seen with increasing mud porosity and short insecticide residual efficacy. This research provides preliminary findings from which can be built upon in future laboratory research, which would lead to a better understand of the interactions between surfaces and insecticides. I have highlighted that surface type does play a significant role in IRS performance and must be considered throughout the development of new IRS products. This is key to understanding how effective new IRS products entering the market will be. This should include testing new products on different surface types in the development stage and collaborating with stakeholders to develop innovative ways to improve the residuality of IRS products on challenging surfaces, particularly mud.

From my experience with IVCC and LSTM I feel fortunate to have gained an insight into the workings of a Product Development Partnership and how stakeholder collaborations allow for sustainable research and development. I was given the independence to develop my own research on this topic, with guidance and support from Dr Derric Nimmo, Dr Graham Small and Dr Rosemary Lees. Prior to my master’s degree I had limited research experience and initially I was nervous about carrying out a desk-based project as being in a laboratory setting was much more in my comfort zone. However, through carrying out this project I have learnt numerous new skills which I will take away into my future career; from identifying the gaps in knowledge to establishing research questions, to analysing data sets and visually communicating research findings.

IVCC, in partnership with Imperial College, London, is delighted to welcome Dr Ellie Sherrard-Smith as its first co-funded Research Fellow.  Working between Imperial’s Department of Infectious Disease Epidemiology within the School of Public Health and Liverpool based IVCC, Ellie will provide IVCC with expert mathematical modelling advice on its product development programme and vector control projects.

Using the Imperial Malaria model, Ellie will identify modelling needs and interpreting new research related to the modelling of vector control products and guide IVCC activities to maximise impact.  Using modelling to explore statistically characterised novel tools, Ellie’s work will provide public health impact estimates and test the impact of novel interventions to optimise product Target product profiles (TPPs).

Prior to joining IVCC as a Research Fellow, Ellie was a Research Associate where she focused on the impact of combining malaria interventions such as drugs and vaccine, vector control and larval source management.

Ellie holds a BSc in Zoology and a PhD in Parasitology, both from Cardiff University.

The London School of Hygiene & Tropical Medicine (LSHTM) and its ARCTEC team, IVCC and Liverpool School of Tropical Medicine (LSTM) are launching a brand new free online course on the control of vector borne diseases such as malaria, dengue and Zika virus, to help fight these diseases, which remain as prevalent and dangerous as ever during the current COVID-19 pandemic.

Vector borne diseases account for 17% of all infectious diseases. In recent months, the COVID-19 pandemic has led to the suspension of many national vector control programmes in disease-endemic countries, despite a plea from the World Health Organization (WHO) to government officials discouraging such action.

For example, a recent study has predicted 81,000 additional deaths in Nigeria due to the disruption to malaria control programs caused by COVID-19, further highlighting a critical need for education and training at a community level in coordinating effective vector control practices.

Progress on the control of all vector borne diseases is at great risk and now, more than ever, accurate information and education is needed to ensure vector control is not disrupted.

Now, the LSHTM and its ARCTEC team, in partnership with the IVCC and LSTM, has designed a massive open online course (MOOC) titled ‘The Global Challenge of Vector Borne Diseases and How to Control Them’.

This innovative and exciting six-week free online course will allow participants to explore the wide range of vectors and the diseases they transmit and learn about traditional and modern vector control. The course will cover state of the art vector control and importantly, participants will also learn about the suitability of vector control practices in the world today.

Using videos, presentations, articles and discussions, participants will hear from a wide range of world-leading experts from around the world, and across disciplines including epidemiology, entomology, vector biology, social science and health systems.

The course is specifically designed for anyone with an interest in vector borne diseases and public health. We particularly encourage those working in global and public health to enroll; including government stakeholders, health workers, those working on vector control programmes, vector researchers and industry employees.

 

“We are thrilled to launch this exciting new course on controlling vector borne diseases in partnership with IVCC and the Liverpool School of Tropical Medicine. As the COVID-19 pandemic continues to disrupt national vector control programs, it is critically important that education and training in coordinating effective vector control practices happens at a community level and this free course will help to achieve this.”

Professor James Logan, LSHTM, lead educator for this course.

 

 “IVCC is delighted to have supported the development of this MOOC.  Vector control has proven to be a critical intervention in the fight against malaria.  This MOOC will help anyone with an interest in vector control learn not just the history of vector control but also the advances being made by organisations like IVCC to bring to market novel vector control interventions to address the growing threat of insecticide resistance.”

Nick Hamon, CEO, IVCC

 

“LSTM is delighted to have partnered with IVCC and LSHTM to put together this course. Online learning has proved itself to be extremely important during the current situation, especially for those that are unable to attend courses in person, so the MOOC opens the doors and gives access to those who wouldn’t normally have it. Vector control has been critical to the reduction of malaria cases in recent decades and increasing the capacity of vector control now, particularly given the backdrop of programmes being interrupted by COVID and the issue of insecticide resistance, has never been more vital.”

Dr Michael Coleman, LSTM

The MOOC, which will officially launch on Monday 21^st September, is open for free enrollment on the FutureLearn site via this link.

LITE (Liverpool Insect Testing Establishment) has launched a new website. LITE was established by Liverpool School of Tropical Medical (LSTM) and funded and supported by IVCC. LITE is a facility that tests new insecticides or repellent based products against a wide range of mosquito populations for commercial partners. Novel insecticides are being sought to help manage insecticide resistance and to counteract the spread of infection by insecticide resistant vectors. LITE maintains a range of insecticide susceptible and resistant colonies of mosquitoes and offers several testing methodologies for insecticide efficacy testing. MHRA accepted LITE, as a provisional member to the GLPMA programme from 23 March 2020, with testing performed to standard operating procedures and quality monitored standards by fully trained and qualified staff.

Visit the website to learn more.