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Treatment and use of Insecticide-treated Mosquito Nets

This topic provides information about Treatment and use of Insecticide-treated Mosquito Nets.

Why use insecticide-treated mosquito nets?

  • Malaria and certain other diseases are transmitted by the bite of mosquitoes. Pregnant women, babies and young children are at the greatest risk of dying of malaria.
  • Ordinary untreated mosquito nets provide limited physical barrier between mosquito and man and protection as they may still bite through the net or get inside the net following improper use.
  • Mosquito nets treated with insecticides provide better and effective protection by keeping away mosquitoes as well as killing them. An insecticide-treated mosquito net also kills or keeps away other nuisance insects – cockroaches, bedbugs, houseflies, fleas, etc.

How to treat the net

10 easy steps for mass treatment

  • Mass treatment is done at fixed/designated sites.
  • Insecticide treatment is recommended for synthetic nets (nylon, polyester), as treatment of cotton nets is not cost-effective and effect of insecticide is not long lasting.
  • Step 1: Collect the necessary equipment
    • The necessary equipment consists of: mosquito nets, insecticide, basin, measuring container, rubber gloves, soap.
    • Make sure the net is washed/cleaned before treatment.
    • Preferably, nets should be treated outdoors in the shade. If treatment is to be carried out indoors, a room with open windows should be used.
    • Use basin, gloves that are not used for any other purpose.
  • Step 2: Put on protective gloves before treating nets
  • Step 3: Measure the correct amount of water. The amount of water needed depends on the net material. Regardless of the size and shape of net, the amount of water required for:
    • One synthetic net (nylon, polyester) – ½ litre (if the net is very large, more water may be needed).
    • If measuring container comes with insecticide, use it to measure water. Otherwise, use any measuring container, that is not used for food, drinks, medicines.
  • Step 4: Measure the correct amount of insecticide
    • The amount of insecticide or “dose” needed to treat a net depends on type of insecticide used. Follow instructions on the container, sachet, packet. Generally, 10-15 ml of insecticide is required to treat one net.
      • [BIS Number of Liquid Synthetic Pyrethroid used for treatment of Bed Nets - i) Deltamethrin – IS14411: 1996; ii) Cyfluthrin – IS14156: 1994].
    • Store leftover insecticide in its original container, in the dark and away from children.
  • Step 5: Mix the water and insecticide thoroughly by gloved hands in basin
  • Step 6: Treatment of nets
    • Always treat one net at a time.
    • Put the net in the basin containing water and insecticide.
    • Soak the net long enough to ensure that all parts of the nets are impregnated.
    • Take out the nets and allow excess liquid to drip back.
    • Do not wring the treated net.
  • Step 7: Drying the nets
    • Let the net dry flat in the shade on plastic sheets.
    • Later, the net can be hung up to finish drying in the shade.
  • Step 8: Disposal of leftover mixture of water and insecticide and insecticide containers
    • Following treatment of all available nets, leftover mixture of water and insecticide, if any, may be used to treat curtains.
    • Otherwise, dispose the liquid in the toilet or a hole away from habitation, animal shelters, drinking water sources, ponds, rivers, streams.
    • Destroy empty insecticide containers, sachets, packets and/or bury in a hole away from habitation, animal shelters, drinking water sources, ponds, rivers, streams.
  • Step 9: Washing and cleaning of hands, equipments
    • Wash equipments (basin, measuring container) with lots of water while wearing protective gloves.
    • Wash gloves (if non-disposable ones are used)] with soap and lots of water, or dispose with insecticide containers.
    • Wash hands with soap and lots of water.
  • Step 10: Washing and re-treatment of nets
    • Washing removes insecticide from the net. So, wash the nets as seldom as possible and gently with soap and cold water and dry flat on plastic sheet in shade.
    • Do not wash/rinse treated net in or near drinking water sources, ponds, lakes, rivers, streams. Dispose of water for washing/rinsing in the toilet or in a hole away from habitation, animal shelters, drinking water sources, ponds, rivers, streams
    • Nets must be re-treated again after it has been washed three times. Or, at least once a year even if it is not washed, preferably just before the rainy season. Nets may be treated twice a year in areas that have a lot of mosquitoes all year long.
  • Points to Remember:
    • Use the insecticide-treated net every night, all year round, even if mosquitoes are not seen/heard. • Preferably, everyone should sleep under a treated mosquito net. Or, at least pregnant women and children under five years must sleep under treated net.
    • Insecticides used for mosquito nets are not harmful to people, if used correctly. Direct skin contact with the insecticide on a still wet net may cause a tingling sensation on the skin. This is not harmful, even for small children.
    • After treatment, the net may smell of insecticide. This will go away in a few days and is not harmful to people who sleep under the net.

Source : National Vector Borne Disease Control Programme

3.03937007874
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