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News Beijing: Hard-to-cure TB poses new global health threat
Beijing: Hard-to-cure TB poses new global health threat

Beijing: Hard-to-cure TB poses new global health threat

by Gillian Wong,
Associated Press

Beijing, 30 Mar 2009 - The Beijing Chest Hospital was packed with people on a recent weekday morning. In the waiting area, Wang Chong, a migrant worker who has been fighting tuberculosis for several months, was facing a dilemma: Does he continue treatment that has already cost him more than $5,000 or stop before his savings are wiped out?

It's not only his health at stake. If Wang stops treatment prematurely, his tuberculosis is likely to morph into one of the new, hardier strains that resist the drugs he has been using and that pose a growing threat to global public health. Countries as diverse as China, Russia and South Africa are vulnerable, and the new strains have also appeared in the United States.

"TB is now taking on a deadly new form — one that will spread further," said Cornelia Hennig, the World Health Organization's TB program coordinator for China. "We can choose: Either we act now with rational and proven approaches, or we pay later with a worsening epidemic."

The WHO is trying to bring renewed vigor to the fight with a three-day meeting of health ministers from the worst-affected countries in Beijing starting April 1. Also attending are WHO Director-General Margaret Chan and Bill Gates, co-chair of the Bill & Melinda Gates Foundation, a major contributor to research on global health problems. Countries are expected to draw up five-year plans to prevent and control the spread of drug-resistant TB.

TB is caused by germs that spread when a person with active TB coughs, sneezes or speaks. It's ancient and treatable but now has evolved into stronger forms: multidrug-resistant TB, which does not respond to two top drugs, and extensively drug-resistant TB, which is virtually untreatable. TB is usually treated in six months with a $20 cocktail of four antibiotics, but its drug-resistant form takes up to two years to fight.

One of the culprits: health care systems that lose track of patients who do not complete their courses of treatment, allowing the TB bacteria to develop resistance to normally potent medicines.

This is also a problem in India, where rural health care is often poor and there is little control over the sale of anti-TB drugs; Russia, which faces a shortage of qualified medical staff and drugs; and South Africa, where the disease thrives amid an AIDS epidemic that has weakened the immune systems of people with HIV.

An estimated half a million people in the world are already infected with drug-resistant TB, nearly a quarter of them in China. Most are still waiting for help, which only increases the risk.

Less than 5 percent of people suffering from drug-resistant TB worldwide are properly treated, said Mark Harrington, executive director of Treatment Action Group, a U.S.-based health advocacy group.

"So most of the people are going around coughing and spreading multidrug-resistant TB," he said. "But most countries have not yet started to take it seriously."

Though the problem is mainly confined to developing countries, health experts warn the risk is widespread as people and their diseases cross the globe. An intercontinental scare was set off two years ago when an American lawyer with drug-resistant TB flew to several countries and back to attend a wedding.

In the U.S., even as TB rates fall, drug resistant strains are showing up in California and other states with large immigrant communities, because many people come from or travel frequently to countries such as Mexico, India and China where TB is a greater risk.

International experts recommend that TB treatment centers monitor their patients rigorously, supplying them with medication and watching them swallow every dose.

In the past decade, China made marked progress in fighting tuberculosis, which until last year was the most fatal infectious disease. Once a person tests positive for TB at a hospital, an Internet-based reporting system helps health officials channel the infected patients to special TB facilities run by the communicable diseases agency.

The Health Ministry says more than 90 percent of new infections are cured every year. But China still has 112,000 people with drug-resistant TB, according to the WHO. Experts say only a few thousand of them are receiving proper treatment.

An underfunded health care system means many TB facilities can't closely track every patient, while most of the 130 million highly mobile migrants from rural China don't qualify for free treatment given to urban residents. Guangdong province, where most of China's export factories are located and home to many migrants, has more TB infections than any other province.

China is developing an electronic system to track infected migrants, the WHO's Hennig said. The government has also promised revamping of health care with a $124 billion investment over the next three years.

The Health Ministry says it is working on a national survey of drug-resistant TB patients and plans to roll out treatment to them, but did not say when. It said treating drug-resistant TB is a hundred times more expensive than normal TB.

Aid agency Doctors Without Borders, also known as Medecins Sans Frontieres, said it was trying for two years to start a drug-resistant TB program in Inner Mongolia but gave up because China wanted too much control over the operation's finances and other issues. The Health Ministry had no immediate comment.

"We are rather frustrated about it ... and the patients continue to go untreated," said MSF's operational coordinator in Brussels, Luc van Leemput, who was involved in the negotiations. "I hope that the Chinese government is going to get its act together and provide access to treatment for those patients who need it."
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Mise à jour le Lundi, 06 Décembre 2010