There are many diseases spread by the bite of infected insects. This article focuses on methods of bite avoidance and therefore ways to reduce not only the inconvenience of insect bites but also ways to reduce the chances of contracting any one of the potentially life threatening diseases including malaria that can be contracted this way

Different types of mosquito will bite at different times, for example the mosquito that carries malaria predominantly bites between dusk and dawn whereas the one that carries dengue fever (predominantly present in Asia but also in the Americas an Africa) will bite during the day, so good bite avoidance techniques should be employed whenever biting insects are present.

There are several basic ways to reduce insect bites and these will be considered in turn. They are to:

Ø Reduce general exposure to insects

Ø Apply repellent to the skin

Ø Use insecticides which are impregnated into materials such as clothing or mosquito nets

Ø Remove insects from the environment using contact insecticides, e.g., knock-down sprays or burners/mats

Reducing Exposure

This means reducing the amount of exposed skin that is available for the mosquito to bite, therefore long sleeved shirts, trousers and socks should all be worn. It’s also been found that the mosquitoes find it more difficult to bite through loose as opposed to tight clothing.

Another way to prevent mosquitoes getting to your skin is to ensure that you always sleep in a mosquito net, these should either have a very fine weave to prevent any insect getting through no matter how small it is, or a larger weave that allows air to circulate better but these should be impregnated with an insecticide (see later)

Application of Repellents

There are many different types of repellent on the market but one of the best is still DEET, when applied in concentrations of at least 20% (many contain 40-50%) it is both long lasting and effective. It is safe when applied to the skin but can damage plastics so its always advisable to wipe your hands after application or you may find that when you go to put your sunglasses back on you leave fingerprints on the lenses. It will also sting the eyes and lips and therefore should never be sprayed directly on the face but can be applied lightly using the hands. Citronella oil and especially its derivatives are also very effective but citronella oil on its own doesn’t last very long at all and would need to be reapplied every hour or so.

Whichever repellent you use it is important to reapply regularly, its difficult to say exactly how often but no repellent will last more than about 4 hours or so (unless it is specially formulated into a slow-release application) and factors such as humidity, wind and the amount you sweat will all reduce effective duration but every couple of hours should suffice. Its also important to cover all exposed skin, not forgetting the ears or the back of the neck since mossies will always manage to find that one little patch of forgotten skin and have a feast!

High strength DEET can also be applied to wrist and ankle bands to be worn at high risk times and if these are stored in a little airtight bag they will remain active for days before another application is required.

Use of Insecticides

The type of insecticide now most commonly used is called permethrin, It’s available for application directly to clothing or in a much stronger solution that can be used to soak mosquito nets and give protection for up to 3-6 months. All nets should be treated where possible because if even a single mosquito gets into your net with you it is trapped for the night, with only you to feed on. It can land on a non treated net for a rest and then return to you for a further meal. When sprayed onto clothing it will effectively kill any insect that lands on the treated clothing and thus prevent the mosquito from biting you for up to two weeks. This method of bite avoidance is advisable for those individuals who find themselves particularly susceptible to insect bites or are in areas of particularly high risk of disease transmission. When using these products it is advisable to avoid contact with the skin whilst still wet, but once dry it is totally safe for humans and it is impossible to tell whether clothing has been treated or not. It doesn’t even smell unlike DEET that used to be used to treat clothing and nets

Removal of Insects from the Environment

These are generally ways to kill insects present in rooms etc. Knockdown sprays are very effective and readily available and the best way to use them is often to spray the room before you go out in the evening and let the insecticide do its work whilst you are enjoying yourself. Alternatively if you have an uninterrupted electricity supply, plug in products that release permethrin-type insecticide into the room throughout the night are very effective. They rely on a small heating element that will either vaporise fluid or heat little mats that in turn release the active ingredient into the room, again harmless to humans and virtually odourless. You can also purchase coils that burn releasing the insecticide, these can produce small amounts of smoke and fumes and should therefore not really be used in enclosed environments, they are however very useful when eating outside. A small piece of a coil (one coil lasts about 10 hours) burnt under the table will keep the mossies away from your ankles – one of the most popular areas for biting insects. Air conditioning will also reduce the number of bites you get during the night if you have none of the other options since lower temperatures do not encourage the mosquitoes to feed and the constant flow of air makes it more difficult for them to find you.

Formore information, visit the Nomad Travel website:Nomad Travel or call the Travel Health Line: 0906 8633414 (calls cost 60p per min) to discuss your travel health queries with a medical.