Biological Malaria control – Tilapia

Via Science Daily
A study done by ICIPE (International Centre of Insect Physiology and Ecology) Nairobi shows that Tilapia in ponds significantly controls malaria causing anopheles mosquitoes.

After 15 weeks the fish reduced both Anopheles gambiae s.l. and Anopheles funestus, the region’s primary malaria vectors, by over 94 percent. The fish also decimated three quarters of the culicine mosquito population.

The findings present a win-win situation for Kenyans, who can use the fish to limit mosquito populations and gain food and income from them too. “O. niloticus fish were so effective in reducing immature mosquito populations that there is likely to be a noticeable effect on the adult mosquito population in the area,” Howard says. This control method is apparently sustainable, as the fish breed and provide a continuous population.

Basically if you’ve got a pond put some Tilapia in there to eat the mosquitoes. Good news, though stagnant pools of water are still breeding grounds… still an interesting study and a great suggestion for controlling malaria.

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Artemisia, China and EA

Early monday morning I was among a group of TEDsters for the DATA morning field trip before the conference. DATA is the organization founded by Bono of U2 to raise awareness about the issues facing Africa, namely Debt, Aids, Trade and Africa. DATA is mostly associated with the lobbying for debt forgiveness for the developing countries such as Tanzania. It was an incredible day, started out at the Artemisia farm of Mr. and Mrs Loshie of Sambasha in Arumeru district.

Artemisia is a plant with a sweet smell that provides raw material for malaria treatment drugs like cotexcin (also marketed in french countries as cotexa). It is a plant that is indigenous to china but grows very well in East Africa. I had not heard of Artemisia before but had seen the cotexin drugs at the pharmacies in kenya. The tour was very informative and eye opening. We began with visiting the nursery which was in the valley. It had rich dark loam soil that is perfect for Artemisia growth The small plant pictured here is an artemisia seedling, the leaves look like those of carrots or cilantro.

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Mr and Mrs Loshie told us about how they irrigate the seed beds and ensure that the seedlings get enough water by having pipes utilize gravity to get the water close to the seedbeds. Mr. Loshie pointed out that he had to hire some manual labour to do the work as he and his wife cannot do it all themselves. In April they had about 400,000 seedlings. They supply the seedlings to other farmers in the area who pay after selling their leaves. As you can already tell, cultivation of this crop generates employment in the community and other farmers also intercrop it into their fields (planting artemisia between other plants like bananas and coffee)

Mr Loshie was asked about the benefit of planting Artemisia vs Maize, he said that he makes 4X more by planting artemisia, and can earn Tsh 15000 from 5 bags. It does take alot of manual labor to harvest, dry and bag the leaves. Once the leaves are bagged and ready, they are bought at he price of 750 Tsh per kilo and transported to Athi River processing plant in Kenya where the ingredient arteminisin is extracted into a crystal form.It takes 1 tonne of artemisia leaves to extract 10kg of crystals. This goes to Novartis in Switzerland where the final product of Cotexcin tabs are made. The TZ country director Tom Lennox explained that the arteminisin content of leaves from EA is very high, and EA can compete with China and Vietnam which have approx 70% of market share processing artemisia. The EA region currently commands 20% of that market. I asked Bruce McNamer the CEO of Technoserve (The company that set up this business in East Africa) if there are any plans to have the tablets made in Kenya or TZ instead of switzerland, especially since the tabs are used in Africa for malaria treatment. He said that the process for certification from the WHO in order to make this a reality is a stumbling block to making this happen. It takes a really long time to get the certification for drug processing.

Artemisia cultivation is a real market opportunity with room for growth and better yet, a platform for EA to compete with China on a cash crop.

More Pics posted here…[Bono was there. He is a sweetheart, a rock star one at that]

I am sitting next to Jen Brea, she blogs about China’s involvement in Africa.

Ndesanjo is liveblogging TED in swahili here.

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