Neglected tropical diseases burden those overseas, but travelers also at riskDecember 26, 2007Though little known to most Americans, lymphatic filariasis, trachoma, leishmaniasis, onchocerciasis, schistosomiasis and other so-called neglected tropical diseases are responsible for severe health burdens, especially among the world's poorest people. Together, it is estimated that these illnesses, most of which are caused by worms or other parasites, rank sixth among all conditions worldwide in robbing people of quality of life and life itself through disability or premature death, respectively. The National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health, has a long-standing, robust program of research and clinical trials devoted to better understanding and combating neglected tropical diseases, most notably those caused by parasites. In 2006, NIAID devoted $117 million to these projects, which are carried out both in the United States and in countries where the diseases are endemic. While most sufferers of neglected tropical diseases reside permanently in tropical regions, Americans and other travelers to such areas may also be exposed to these disease-causing organisms. To better gauge illnesses following travel to the tropics and subtropics, the GeoSentinel Surveillance Network, a network of travel/tropical medicine clinics on six continents, was established in 1995. A new paper by NIAID scientist Thomas Nutman, M.D., and colleagues reviews network data collected between 1997 and 2004 to determine demographic and travel characteristics of travelers diagnosed with parasitic worm (filarial) infections. The researchers found that filarial infections responsible for such diseases as onchocerciasis (river blindness), lymphatic filariasis (elephantiasis) and loiasis (African eyeworm illness) made up 271 (0.62 percent) of the 43,722 medical conditions reported to the network during that time period. Additionally, the data showed that immigrants from filarial-endemic regions were most likely to come to the travel/tropical diseases clinics, and that long-term travel of more than one month was more likely to be associated with filarial infection than were shorter trips. The most commonly acquired filarial infection (37 percent) was Onchocerca volvulus, the worm that causes river blindness. While clinical presentation of filarial disease is known to differ between visitors to and natives of endemic regions, this new analysis provides a quantitative assessment of the characteristics of those who acquire filarial infections following travel. Furthermore, the information collected by the GeoSentinel network can be used to assess not only acute but also chronic infections. Ultimately, the authors write, these data will provide a comprehensive backdrop to pre-travel advice and post-travel treatment for those at risk of acquiring a filarial infection. NIH/National Institute of Allergy and Infectious Diseases |
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| Related Tropical Disease Current Events and Tropical Disease News Articles Scientists decode genome of deadly parasitic worm Scientists have sequenced the genome of the parasite that causes intestinal schistosomiasis (also known as bilharzia or snail fever), a devastating tropical disease that afflicts more than 200 million people in the developing world. New test may help to ensure that dengue vaccines do no harm As vaccines against a virus that infects 100 million people annually reach late-stage clinical trials this year, researchers have developed a test to better predict whether a given vaccine candidate should protect patients from the infection, or in some cases, make it more dangerous, according to an article just published in the journal Clinical and Vaccine Immunology. Biomarkers in blood could aid diagnosis of crippling, often fatal forms of malaria Canadian researchers have identified protein biomarkers that shed new light on the development of two severe and debilitating forms of malaria. New role for Natural Killers! Scientists at the University of York have discovered a new role for a population of white blood cells, which may lead to improved treatments for chronic infections and cancer. Study finds doxycycline effective against filariasis in Southeast Asia Doxycycline alone is more effective against the most common form of filariasis in Southeast Asia than the standard treatment, with significantly fewer side effects, according to a new study published in the May 1 issue of Clinical Infectious Diseases and currently available online. Tropical disease experts call for a 'Global Fund to Fight Neglected Tropical Diseases' An international team of tropical disease control experts has urged the global health and development community, and particularly the G8 leaders, to establish a new financing mechanism to combat the neglected tropical diseases (NTDs) of poverty. Parasitic tropical diseases in the Americas, a legacy of slavery, can be eliminated Although it has been speculated for more than a century that the slave trade was responsible for bringing many tropical diseases to the Americas, only recently has convincing evidence shown that lymphatic filariasis (elephantiasis), schistosomiasis, and onchocerciasis (river blindness) originated in this way. Study finds multiple neglected tropical diseases effectively treated with drugs The neglected tropical diseases are a group of 13 infectious diseases, including elephantiasis, hookworm, African sleeping sickness and trachoma, which affect more than 1 billion people worldwide, most of whom live in extreme poverty. UVA Researchers Study Link Between "Alzheimer's Gene" Researchers at the University of Virginia School of Medicine and Federal University of CearĂ¡ in Brazil have joined forces to study if the gene believed to contribute to Alzheimer's protects children from the developmental stresses of early childhood diarrhea. Targeting wolbachia, doxycycline reduces pathology of lymphatic filariasis Lymphatic filariasis, a mosquito-borne tropical disease that afflicts 120 million people worldwide, can cause debilitating swelling of the legs and genital areas. More Tropical Disease Current Events and Tropical Disease News Articles |
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