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Every year, a group of 17 diseases makes life “miserable” for more than one billion people, reports the World Health Organization (WHO.) The group of diseases is called Neglected Tropical Diseases (NTDs), and it includes tropical infections that affect predominantly low-income populations in developing regions in Africa, Asia and the Americas.
The NTDs are caused by a variety of pathogens such as bacteria, viruses, protozoa and helminthes, and in sub-Saharan Africa their negative effect as a group is comparable to malaria and tuberculosis. Seventeen NTDs are prioritized by WHO, and affect an estimated 1.4 billion people (including more than 500 million children) in 149 countries.
Neglected Tropical Diseases include Chagas disease, also known as American trypanosomiasis. There are approximately 15 million people in the Americas with this disease which, although it doesn’t kill victims rapidly, it causes years of debilitating symptoms; dengue fever, of which there are 50-100 million dengue fever infections annually which can lead to a serious and potentially fatal form called severe dengue; echinococcosis, of which there are more than one million people infected; leishmaniasis, which is fatal if untreated and of which there are an estimated 12 million people infected and onchocerciasis, also known as “river blindness” of which there are 37 million people infected, just to mention a few of them.
Important advances have been made in the fight against these diseases. In 2013, they resulted in 142,000 deaths in 1990 –down from 204,000 deaths in 1990. Despite these gains, full control of NTDs will require between US $2 billion to US $3 billion on the next five to seven years.
This cost pales in comparison to the U.S. wars in Afghanistan and Iraq which will cost taxpayers between US$4 trillion to US$6 trillion, including the medical care of wounded veterans and expensive repairs to a force depleted by more than a decade of fighting, with no end in sight. At the same time, African countries –where these diseases are widespread- have had the greatest increase in military budgets worldwide in recent years.
The NTDs seriously impacts economic, social and health indicators. Some experts argue that the economic burden of the NTDs is underestimated. For some poor families in developing countries without appropriate health coverage these diseases often cause deferral of treatment and even financial ruin. They may cost the economies hundreds of millions of dollars that could be avoided with effective prevention campaigns.
Some of these diseases, such as leprosy and lymphatic filariasis can cause severe deformities and lead to inability to work or lead a normal social life. Some NTDs disproportionately affect women, a fact that should be considered when designing preventive programs and treatment options.
Some experts argue that these diseases have been traditionally overlooked because they mainly affect people in the poorest developing countries, where attention has been placed on defeating HIV/AIDS, tuberculosis and malaria. In addition, these diseases have a more immediate impact on people’s health than NTDs, which generally present with fewer symptoms and have long incubation periods before they manifest clearly.
Another reason for the neglect of the NTDs is that they are not commercially profitable and therefore don’t stimulate innovation and investment. Additionally, unpredictable epidemics such as by the Ebola virus and their potential to expand into other countries can divert efforts and resources from the fight against NTDs.
Presently, the control of these diseases is left to governments and international non-governmental organizations (NGOs.) Only two donor-funded NGOs work exclusively on NTDs: the Schistosomiasis Control Initiative and Deworm the World.
The WHO has developed five public health interventions to improve prevention, control and eradication of NTDs: Improved disease management; preventive chemotherapy; vector ecology and management; veterinary public health services and provision of safe water, sanitation and hygiene. They should be implemented within a framework of increased State-level engagement, innovative financing and universal coverage against NTDs.
Dr. Cesar Chelala is a winner of an Overseas Press Club of America award and a national journalism award from Argentina.