WHO Warns that Climate Change May Worsen Health Crises

In commemoration of World Health Day, Dr. Margaret Chan, the director of the World Health Organization, warned that climate change stands to exacerbate health crises in the world’s poorest communities.

Reuters reported:

WHO Director-General Margaret Chan said that new patterns of global rainfall, droughts and storms could accelerate the spread of diseases such as malaria and dengue fever in some regions, creating serious problems for poor nations.
“The climate change-sensitive diseases and conditions are already creating huge burdens in many countries… The impact of climate change can act as an amplifier,” she told a news conference in Geneva, where the United Nations agency is based.

Confronting the health challenges from global warming will require concerted efforts to forecast changing weather patterns, fight mosquitoes and other disease-spreading bugs, distribute vaccinations and boost medical coverage, Chan said.

In sub-Saharan Africa, projections indicate that changing climate patterns will have serious implications on agricultural productivity, water availability and human health.

-The areas suitable for agriculture, the length of growing seasons and the yield potential of food staples are all projected to decline- some African countries could see agricultural yields decrease by 50% by 2050 and crop net revenues could fall by as much as 90% by 2100.

-Rising temperatures can alter runoff patterns and increase water evaporation rates, which can severely reduce the availability of water. By 2020, an additional 75-250 million people in Africa are projected to be exposed to increased water stress due to climate change.

-Previously malaria-free highland areas in Ethiopia, Kenya, Rwanda and Burundi could experience modest incursions of malaria by the 2050s, with conditions for transmission becoming highly suitable by the 2080s. In total, an additional 260-320 million people worldwide could be living in malaria infested areas by 2080.

While these trends and events can not be attributed solely to climate change, they are the types of challenges that will become more frequent and intense with increasing climate variation.

Read about World Health Day 2008: Protecting Health from Climate Change

Read more about how climate change will impact sub-Saharan Africa.

-Nora Coghlan

Drug-Resistant TB Rate Rising

The World Health Organization (WHO) published their largest survey ever on multidrug-resistant tuberculosis (MDR-TB) on Tuesday. In summary, MDR-TB is more prevalent, and more in need of control, than ever.

“TB drug resistance needs a frontal assault. If countries and the international community fail to address it aggressively now we will lose this battle,” said Dr Mario Raviglione, Director of the WHO Stop TB Department. “In addition to specifically confronting drug-resistant TB and saving lives, programmes worldwide must immediately improve their performance in diagnosing all TB cases rapidly and treating them until cured, which is the best way to prevent the development of drug resistance.”

Read the full study here, some key findings below:

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• The WHO estimates that there are nearly 500,000 new cases of MDR-TB each year, about 5% of the approximately 9 million new cases of regular TB per year
• The highest rates of MDR-TB were found in countries in the former Soviet Union and China. China and India carry about half the global burden of MDR-TB and the former Soviet states another 7%. Rwanda had a noticeably high percentage of MDR-TB cases among TB patients (3.9%), but data on MDR-TB presence in Africa was rather limited in the study.
• Extensively drug-resistant TB (XDR-TB), a virtually untreatable form of TB, has been recorded in 45 countries.
• Surveys in Latvia and the Ukraine found nearly twice the level of MDR-TB among TB patients living with HIV compared to those without. In South Africa, 44% of TB patients are estimated to be co-infected with HIV.
• MDR-TB and XDR-TB are progressively more expensive and difficult to treat.

The WHO estimates that $4.8 billion is needed for overall TB control in low and middle income countries in 2008, with $1 billion for MDR-TB and XDR-TB. There is a total finance gap for 2008 of $ 2.5 billion, including a $ 500 million gap for MDR-TB and XDR-TB.

TB (control), or not TB (control)

There’s an important editorial in the LA Times today about drug-resistant tuberculosis.

A couple of excerpts:

“A new survey by the World Health Organization shows that drug-resistant tuberculosis is even more widespread than had been feared — on average, it’s present in 5% of new TB cases. That’s 500,000 drug-resistant cases a year. If most Americans aren’t concerned by this, it’s because they don’t yet understand that drug-resistant tuberculosis is no longer a disease that threatens mainly HIV and AIDS patients and the Third World poor. It threatens us all. Worldwide, only 8% of TB cases occur in HIV/AIDS patients…

Even after the panic last year caused by Andrew Speaker, the jet-setting honeymooner found to have MDR TB, funding to stop the disease has lagged. The WHO, which gets its money from United Nations member states, estimates it needs $4.8 billion for global TB control. But despite increases in funding from the U.S., Britain and private donors, it still faces a $2.5-billion shortfall.

You can read the full piece here.

WHO Releases Malaria Report Tomorrow

A new report on malaria from the World Health Organization outlines some positive news. Among the key findings is that the distribution of bed nets and medications have cut malaria deaths in half in Rwanda and Ethiopia.

From a Washington Post article this afternoon:

“This is the first time we have seen these results with the new tools,” said Arata Kochi, head of malaria programs for WHO.

“This is a genuinely historic achievement,” said Richard G.A. Feachem, former director of the Global Fund to Fight AIDS, Tuberculosis and Malaria. “This is not theoretical. We do not have to wait for a vaccine or new drugs. If we implement today’s technologies aggressively on a national scale, we will have a big impact.”

Two key items in the current “tool kit” are bed nets impregnated with insecticide that lasts three to five years and treatment with at least two drugs. One of them is artemisinin, a compound originally derived from a Chinese herbal medicine.

Read the Washington Post article here. Tomorrow we’ll be able to link to the full report.

-Virginia Simmons

Malaria risk up in southern Africa

The World Health Organization is warning that unusually wet conditions in southern Africa could cause an increase of malaria infections this year.

From today’s BBC News piece:

“The WHO has urged countries to raise awareness and distribute anti-malaria drugs and insecticide-treated nets…

‘Malaria is a climate sensitive disease and for this time of the year we have experienced uncommonly heavy rainfall and flooding in parts of southern Africa,’ said Joaquim Da Silva, WHO’s Malaria Epidemics & Emergency Officer in the region.”

Read the full piece here.

-Virginia Simmons