Malaria - a useful tool box talk

Malaria. We’ve all heard about it, many of us will have taken anti-malaria drugs for our travels, but do we really know what we’re dealing with?

At Red Square Medical, we do love a tropical disease, so we’ve put together this guide on all things malaria to help you and your crew stay safe, whether you’re travelling for work or fun!

Key Facts
  • Malaria is caused by parasites that are transmitted via bites from infected female Anopheles mosquitoes (the pesky blighters).
  • It can take just one bite to become infected. Bites mostly occur between dusk and dawn.
  • There are 5 parasites that cause malaria in humans, with two of these (P. falciparum and P. vivax) posing a greater threat.
  • It is life threatening.
  • It is preventable and curable.
  • Malaria can’t be passed from human to human.
  • In 2020, it was estimated that there were 241 million cases of malaria worldwide.
  • In 2020, there were 627,000 deaths from malaria.
  • 95% of cases and 96% of deaths were in the World Health Organisation (WHO) African Region.
  • Children under 5 years accounted for 80% of all deaths in the region.
  • As recently as 2020, half the world’s population was at risk of malaria.
  • Infants, children under 5, pregnant women, people with HIV/AIDS and those who are immunocompromised are at most risk.
  • People with low immunity moving to areas with intense malaria transmission rates are also at risk - migrant workers, mobile populations and international travellers.
  • Numbers of infections and deaths increased significantly from 2019 to 2020 though disruption from COVID-19 is partially responsible.
Symptoms
As with so many infections, the first signs of malaria are a fever, headache, ‘chills’, fatigue, vomiting and muscle aches, which can be mild and difficult to recognise as malaria. Other symptoms may include yellow skin or whites of the eyes, confusion, lethargy, nausea, loss of appetite.

Symptoms normally appear 7-18 days after the mosquito bite. But one of the parasites, P. falciparum, can progress to severe illness and death within just 24 hours if untreated. Symptoms of P. falciparum include behavioural changes, confusion, seizures, anaemia, respiratory failure, kidney failure, coma and shock.

In contrast, malaria can take weeks or even months to develop. In cases caused by the parasites P. vivax and P. ovale, relapses may occur weeks or months after being infected. Occasionally it can be years before symptoms appear. 


Where is Malaria found?
Travellers going to malaria endemic areas in Africa, South America, and Asia are at high risk, with four African countries accounting for over half of all malaria deaths - Nigeria, Democratic Republic of the Congo, United Republic of Tanzania and Mozambique. 

It is also found in the Dominican Republic and Haiti, parts of the Middle East and some Pacific islands. 

People exposed to malaria in endemic areas who go back to their home country to visit friends and relatives are also at risk due to waning immunity. Although partial immunity is developed during years of exposure to the parasites, no one becomes fully immune to malaria. 

If you’re concerned about the malaria risk for a country you’re visiting or transiting, you can use this link from the Centers for Disease Control and Prevention to check out the risk levels, specific areas and other details: https://www.cdc.gov/malaria/travelers/country_table/a.html

Since 2015, 9 countries have been certified by the WHO Director-General as malaria-free, meaning that they have achieved 3 years or more with no reported infections. These countries are the Maldives, Sri Lanka, Kyrgyzstan, Paraguay, Uzbekistan, Argentina, Algeria, China and El Salvador.

Prevention and treatment
For decades, there has been a global battle to combat malaria. Vital methods of control now include ‘vector controls’ and antimalarial drugs. 
Vector control basically means interventions such as insecticide treated nets and indoor residual spraying, helping to reduce transmission and prevent infection. 

Antimalarial drugs are taken prior to travel to a high risk area and should be used in conjunction with other malaria control activities.
Preventative medications are available for high risk individuals (e.g. infants and pregnant women) in high risk areas, and since October 2021 a vaccine has been available for children living in areas with high P. falciparum transmission. However all medicines should be used in conjunction with other malaria control activities. 

Is it really a risk to mariners and superyacht crews?

Recently, UK P&I Club Members reported two cases of death and two more cases of serious illness, both resulting in a three month hospital admission, due to malaria.

These cases arose despite the crew members being on medication to prevent the disease. It was later found that the crew members either did not have the correct medication, for the countries they were travelling to, or they were unsure about the correct dose they should be taking. You can read more here: https://www.ukpandi.com/news-and-resources/news/2019/crew-health-advice-preventing-and-reducing-malaria-transmission/

So yes, our opinion is that it’s something we all need to be aware of and take the appropriate steps to ensure we protect ourselves to the best of our ability. 

How to protect yourself…
  • Check out the malaria risk for countries you’re due to visit well in advance.  https://travelhealthpro.org.uk/countries
  • Some antimalarial drugs must be taken for a few days or weeks prior to travel, and a few weeks after you return, so make sure you speak to your GP early enough.
  • Make sure you have the correct medication for the geographical area.
  • Make sure you have enough medication on board to last at the right dose for your whole trip, plus extra in case you are delayed. 
  • Wear long sleeved shirts and trousers in the evening when the mosquitoes are most active. 
  • Use 50% DEET based insect repellent on your skin. It smells bad though, so may repel more than just mosquitoes!
  • Sleep under nets treated with insecticide, or use over doors, windows and ventilation holes.
  • Use insecticide in cabins. 
  • Don’t sleep on deck.
This White Paper from the International Association for Medical Assistance to Travellers give some great tips on all things malaria too: https://www.iamat.org/how-to-protect-yourself-against-malaria 

It’s been well proven that early diagnosis and treatment reduces the risk of malaria and prevents deaths. So if you have travelled to a country with malaria and start to feel unwell, make sure you seek medical advice sooner rather than later. 

It’s also worth remembering that malaria can reoccur, sometime years after the original infection. 

Our Paramedic trainer, Rachel, has treated a patient who called for the ambulance himself but was unconscious by the time the crew arrived. He had a fever and was sweating profusely. He did recover sufficiently to answer questions and had felt unwell and getting worse for a few days. Symptoms were consistent with malaria but it was only when his wife arrived and mentioned the patient having had malaria previously that it was considered he could be suffering a relapse many years after his initial infection. 

So if you’ve had malaria once, and you experience symptoms that feel ‘a bit like that time I had malaria’, be alert and get checked out asap. 

Of course, if you need any further information, please get in touch, we’d be happy to help. 

by Rachel Smith 12 February 2025
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by Rachel Smith 30 December 2024
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by Rachel Smith 18 December 2024
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by Rachel Smith 11 December 2024
All the guest blogs! When we started adding blogs to our website back in early 2021, we did a little feature on each of our instructors of the time. They’re quite a fascinating bunch and the series proved quite popular amongst our followers. In addition to our amazing instructors, we work with some utterly incredible human beings all over the world, and the idea of sharing their stories grew and developed into what eventually became a monthly guest blog. It’s been interesting to find out more about how medical care at sea or in remote locations features in their work, and to discover a few fun facts along the way. This month, we thought that it might be a fun idea to give you a chance to go back into the archives and review all the guest blogs over the last few years! Maybe even let us know which your favourite one is?
by Rachel Smith 27 November 2024
We’ve taken a look at the 2023 Casualty Summary Report from the Maritime Authority of the Cayman Islands (MACI) to see what kind of incidents and trends their data shows us, even with relatively small data sets, and how this may be able to transfer to our own risk assessments and actual practice. You can find the report here: Cayman Maritime Report 2023 The first thing we noted was the authors note that the data is split out into incidents. This means that one incident may include a number of events. So a collision and any resulting injury is one incident, but is reported as two events, or more, if more than one person is injured. It made us wonder whether this method of reporting by an authority represents how incidents are reported onboard and whether it should be a consideration? Of course, for any set of statistics presented at the moment, we also have to consider the COVID-19 pandemic and the impact this has on trends including that period. While essential shipping continued, the cruise and superyacht sectors reduced activity and staffing, often to a skeleton crew while anchored somewhere. So this will be reflected in the historic data sets that we analyse from 2019 to 2021 and may not accurately reflect increases and decreases during and since then. In some situations, we may need to look further back for accurate data. We also need to consider whether increases in incidents and events is also down to increased reporting - suggesting an improvement in the awareness of reporting requirements and greater engagement from the industry and individual sectors - this can only be a good development. Since 2020, the type of injury has been recorded in 8 different categories, with hand and foot injuries topping the leaderboard, closely followed by head, body, and back injuries. So if you were looking to run drills, or practise medical skills, these would be the key areas to cover. Only one death was an occupational accident, and is being investigated here: MAIB Investigations (search for case #9229607). It relates to a fall down a ventilation shaft on a bulk carrier in a Greek shipyard. The full report was still pending at the time of writing. Merchant ships are heavily regulated by a number of authorities, and the requirements for personal protective equipment and safe systems of work are enforced and applied to reduce accidents and incidents onboard. This has led to a lower reporting of incidents than in the commercial yacht sector. Could there be room for improvement here in this area? We certainly think so. Many of the hand and foot injuries reported can be career ending or life changing, but are preventable. Follow up has shown that there is a link here with injuries being sustained when inappropriate or no PPE was used. The supply and use of appropriate PPE is mandatory on vessels subject to the MLC and it’s worth remembering that some PPE can be produced in styles and designs compatible with the aesthetics of a yacht if required! On a much wider scale, a lack of transparency and standardisation globally can affect the collection of data and the issue of under reporting. While the MACI figures may be accurate, we need other accurate figures to compare them to, in order to build a bigger picture across the world as we have in aviation. From December 2024, the Maritime Labour Convention (MLC) will be enforcing an amendment so that seafarer deaths will be recorded and reported annually. The MACI and Cayman Islands Shipping Registry produces a number of safety flyers that are publicly available HERE that may be useful. In summary, analysing data can sometimes result in more questions than answers. But even this can lead to interesting and important developments that result in improved safety and reduced incidents and accidents onboard. Key points to take from this report are: Use the correct PPE for the task. Employ approved systems of work and risk assessments for the task. Reporting is key for safety in the future of our industry. Enjoy a night ashore, but don’t over do the cocktails! As always, if you’d like any input on medical training onboard or ashore, or drills that you can run yourselves, please just get in touch. References: https://www.lloydslist.com/LL1145359/Increase-in-incidents-of-deaths-at-sea
by Rachel Smith 6 November 2024
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by Rachel Smith 3 October 2024
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by Rachel Smith 25 September 2024
Welcome to our September blog, and as we all start (in the UK at least!) to think about adding a few layers for warmth, we’d like to talk about getting naked! Well, to be more specific, getting bra’s off. Fact: Women are dying because bystanders are less likely to carry out CPR on women than men. Research shows that women are 27% less likely to receive CPR than men and if a defibrillator is used, their chance of survival is affected by bra’s being left on. Most of us have never had the chance to train using a female manikin. The #BraOffDefibOn campaign aims to address the inequality in CPR for women and we’re supporting it.
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