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  • Reply to: Potassium in Artemisia plants, a key factor in malaria control?   1 day 2 hours ago

    The malaria parasite Plasmodium falciparum establishes in the host erythrocyte plasma membrane new permeability pathways that mediate nutrient uptake into the infected cell. These pathways simultaneously allow Na+ influx, causing [Na+] in the infected erythrocyte cytosol to increase to high levels.
    The intraerythrocytic parasite itself maintains a low cytosolic [Na+] via unknown mechanisms and extrudes Na+ against an inward gradient via PfATP4, a specific parasite plasma membrane protein
    This pfATP4 pump plays a critical role for plasmodium and other apicoplasts. During the asexual life cycle of Plasmodium falciparum it shows a 5-fold increase from the ring stage to the merozoit stage ( S Krishna et al., J of Biol Chem 2001, 276-14)
    Scopoletin is a key constituent of many Artemisia species and probably contributes to their antimalarial efficiency. It has a significant effect on erythrocyte membrane ATPases and is likely to inhibit some of the mechanisms implemented by the parasite to regulate sodium, potassium ans calcium concentrations for its development and reproduction. Scopoletin particularly activates the Na-K-ATpase and to a lesser extent the Ca-ATPase and the Mg-ATPase at µM concentrations (C.A Ezeokonkwo et al., Nig J Nat Prod and Med, Vol 05, 2005, 37-40)

  • Reply to: Injectable artesunate: cure or killer?   5 days 7 hours ago

    Anemia similar to that noted in recent reports on imported malaria in Europe after IV artesunate treatment is also reported in France (M Danis et al., Bull Acad Nat Méd 3, 699-716, 2013). Artesunate is not licensed in Europe but has been available in France since May 2011 through patient program controlled by the French Agency for Drug Safety [ANSM]. The first 99 patients treated with artesunate up to September 2012 experienced satisfactory efficacy and tolerability. Delayed, sometimes persistent anemia was observed in 29% of the patients . This unexpected adverse effect requires further investigation. IV artesunate is now recommended as the first-line treatment for severe falciparum malaria in France.

    This is close to the figure of 23 % reported for Belgium and Netherlands (A Kreeftmeijer et al., Malaria Journal, 2012, 11 :102) and to the average figure reported for Europe : 6 patients out of 25 travelers treated at 7 centers in Europe ( T. Zoller et al., Emerging Infectuous Diseases, 17, 5, 2011).

    Who is going to stop this disaster !

  • Reply to: Two major problems with WHO Chemical Dependency Pathway to Malaria Suppression   1 week 1 day ago

    Hi Bill,

    I am not a descendant of dike builders, however my four kids are Cajuns from their mother's side. The Canjuns (slang for "Acadians") of Louisiana originated in French Acadia which is present day Nova Scotia & New Brunswick Canada on the Bay of Fundy.

    The Acadians began their colony a decade before the Pilgrims landed at Plymouth Rock. The Acadian settlers floundered for many years before they began diking and draining the marshes. By 1755, (when they were expelled by the British) there were 15,000 Acadians and they were very prosperous.

    The dikes in Holland are major engineering works. What I have in mind for African estuaries and river valleys is more like what was done in Acadia in the 17th and 18th centuries. The Acadian dikes and "Aboiteaux" - what they called their unique tide gates - were obviously constructed without heavy equipment.

    The Acadian diking projects brought people together and made strong prosperous communities that survived the Great Upheaval (or Le Grand Dérangement) of 1755.

    Economic development is vitally important for the eradication of malaria. In the right places, flood control and diking and drainage for agriculture will spark spectacular economic development as it did in Acadia, In Holland, in Egypt 6,000 years ago, in Mesopotamia before that.

    If done with innovation, diking and draining marshes and flood plains will reduce mosquito populations, produce food, and improve people's standards of living.

    It is completely counter-intuitive, however I believe that diking and draining can be done while preserving important wetland habitats. I have a photo of the salt marsh vegetation upstream from one of my tide gates at Edison Slough in Washington State. It's gorgeous! (I'll e-mail it to you.)

    It's low-tech and it's not particularly flashy, but I believe that diking and draining is how the battle against malaria will be won on many fronts.

    Jeff, father of half-Cajuns

  • Reply to: Two major problems with WHO Chemical Dependency Pathway to Malaria Suppression   1 week 1 day ago

    Thanks Jeff,

    But as a descendant of one Willie Kieft from Groningen, I must remind you of the way Holland has reclaimed its coast from the North Sea, and managed to grow enough tulips for all of us.

    Also see Alvaro Pemartin's recent column on northern Europe and how Finland and Holland controlled malaria.

    Bill, grandson of Willie Kieft the Dutchman

  • Reply to: Two major problems with WHO Chemical Dependency Pathway to Malaria Suppression   1 week 3 days ago

    This is a vitally important question, however I would not expect RBM, WHO, and/or the USPMI to volunteer an answer.

    My speculation, from least devious to most devious:

    1) Ignorance - They simply are ignorant of the history of past malaria eradication success stories.
    2) Hope - They are wishing for a magic bullet.
    3) Ego - To change course now would be an admission that their efforts to date have been a dead end.
    4) Arrogance - They think they're smarter and more capable than William Gorgas, Israel Kligler, Arthur E. Morgan or other-like-minded leaders and drainage engineers who lived 100 years ago.
    5) Sloth - Significant effort is required to design, construct, operate & maintain flood control and drainage infrastructure.
    6) Greed - The directors of these organizations hold stock in Dow Chemical, Union Carbide, and all of the big chemical companies. (I jest.)
    7) Bureaucracy - Bureaucracies are unaccountable behemoths. They are accessories to mass-murder by neglect and there is no consequence for this.

    (My Seven Deadly Malarial Sins.)

    Turning marshes into farms via diking and draining should be profitable. Lack of money is not a valid excuse.

    Diking and draining a portion of a floodplains for agriculture results in a remarkably constructive geometric progression: If one person can construct, say 400 feet of dikes, he will surround 100 x 100 SF. If he works with his neighbor, they will construct 800 feet and surround 200 x 200 SF. FOUR TIMES THE AREA!!! Their combined farm has twice the area per person compared to the one-man dike.

    This is absolutely amazing:

    If 100 people in a region all collaborate to construct a single very large square dike, the enclosed farm will have 100 times the area PER PERSON. This is a remarkable geometric progression.

    You can demonstrate the above with two or more people and a box of toothpicks. Even a five years-old will see the light: Give each person four toothpicks and have them make a square. Now compare the size of the 2, 3, 4... 1 x 1 squares to a single large square made up of all the toothpicks. If you have ten or more people it is impressive.

    I believe that this is why the Egyptians were able to mobilize sufficient manpower to build the pyramids. The Nile has a large flood plain and geometric progressions are astounding.

    Mosquitoes propagate geometrically and the Plasmodium parasite also propagates geometrically. It seems reasonable that winning this war will require a geometric progression working to OUR advantage.

    The icing on the cake is FOOD - and COMMUNITIES COOPERATING - and JOBS - and PROSPERITY.

    Let's do this shall we? Who's in?