Category Archives: hookworm

How the outhouse helped save the South and what it can do for the world’s bottom billion

 

Last century, the invention of the outhouse helped to eliminate hookworm and other parasites in the United States. Now new research shows that the lowly latrine could be a powerful tool in controlling these diseases, which remain widespread among the world’s poorest people.

It’s pretty simple. Whether people use it or just have access to it, the latrine could help save hundreds of millions of people from disabling disease. So concludes researchers from the Swiss Tropical and Public Health Institute, who found that in study sites, latrines halved the risk of infection from three common intestinal parasites- hookworm, roundworm and whipworm. Their research was published earlier this week in PLoS Medicine.

Hookworm, roundworm and whipworm– known collectively as the soil-transmitted helminthes or STH’s- are transferred from person to person through contact with feces-contaminated soil. It makes sense then that latrines or toilets would have a major impact on reducing transmission. This isn’t exactly a new idea. Today STH’s are most common in developing countries where there is limited access to clean water and basic sanitation. It wasn’t that long ago though that STH’s were a major problem here in the US, especially in the American South. It was the invention of the outhouse, in combination with anti-helminthes treatments, that helped eradicate these diseases. Continue reading

Bugs, Animals and NTDs

By: Alanna Shaikh

Animals and insects play a huge role in the transmission of neglected tropical diseases. From the snails that carry schistosomiasis to the wild animals infected with African sleeping sickness, the NTDs rarely travel alone. That means any effort to control and eliminate NTDs must take into account their many vectors and reservoirs of disease.

The NTDs are not zoonoses. That is, they are not diseases that animals can directly infect humans with. It’s more complicated than that. For example, in the case of human African trypanosomiasis, infected animals are bitten by the tsetse fly, which then carries the parasite to human victims. As long as animals remain infected, there is a risk of human infection.

In the case of schistosomiasis, the parasite that causes the disease has to spend part of its life living in certain kinds of snail. In this case, eradicating the snail would probably eliminate the disease, but doing it isn’t essential. They’re not a reservoir for the parasite, just a stopping point at one time in its revolting little life.[1] The animals reservoirs of schistosomiasis are dogs, cats, rodents, pigs, horses and goats[2], who just get infected with the disease the same way people do.

Be they roundworm, hookworm, nematode, or whipworm, the NTDs have got you totally covered for wormy horror.  In possibly the most yucky arrangement of all, many NTDs are causes by actual visible to the eye worms that LIVE INSIDE YOU. I hope my use of all caps conveyed my sheer horror to you. If it didn’t, go take a look at , then come back here and try to pretend you aren’t horrified.

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Deworming as a public health intervention: can it have lasting effects?

On May 16, 2011, the Center for Global Development hosted an event for Michael Kremer and Sarah Baird to present data on their long-term follow-up research study called “Worms at Work: Long-run Impacts of Child Deworming in Kenya.” Other authors on the paper include Joan Hamory Hicks and Edward Miguel). This paper concludes that deworming in Kenyan schools can show significant, long-term gain in employment and earnings and among dewormed children. Continue reading

World Malaria Day – Achieving Progress and Impact

By: Linda Diep

Today I had the pleasure of attending a videoconference presentation on the successes and contributions made by the Centers for Disease Control and Prevention (CDC) in the fight to end malaria. The videoconference, held in the CDC’s Washington DC office, featured presentations from the following active players in malaria control:

  • Dr. Richard W. Steketee, MACEPA, PATH
  • Dr. Kim Lindblade, Malaria Branch, CDC
  • Dr. S. Patrick Kachur, Malaria Branch, CDC
  • Dr. John MacArthur, Malaria Branch, CDC

Opening remarks were made by Dr. Thomas R. Frieden, Director of the CDC, who said although malaria numbers continue to decrease, these statistics are still high. Dr. Frieden stated that every 45 seconds a child dies of malaria. Malaria affects much of the developing world, and may in fact be over-diagnosed.

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