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WASHINGTON (AP) — The U.S. government is stepping up efforts to help Central American farmers fight a devastating coffee disease — and hold down the price for a cup of coffee.

At issue is a fungus called coffee rust that has caused more than $1 billion in damage across Latin America. The fungus is especially deadly to Arabica coffee, the bean that makes up most high-end, specialty coffees.

Already, it is affecting the price of some of those coffees in the United States.

"We are concerned because we know coffee rust is already causing massive amounts of devastation," said Raj Shah, head of the U.S. Agency for International Development.

On Monday, Shah was expected to announce a $5 million partnership with Texas A&M University's World Coffee Research center to try to eliminate the fungus.

But the government isn't doing this just to protect specialty coffees, as much as Americans love them. The chief concern is about the economic security of these small farms abroad. If farmers lose their jobs, it increases hunger and poverty in the region and contributes to violence and drug trafficking.

Washington estimates that production could be down anywhere from 15% to 40% in coming years, and that those losses could mean as many as 500,000 people could lose their jobs. Though some countries have brought the fungus under control, many of the poorer coffee-producing countries in Latin America don't see the rust problem getting better anytime soon.

Guatemala, El Salvador, Honduras, Panama and Costa Rica have all been hard hit.

Much of the blander, mass-produced coffee in this country comes from Asia and other regions. Most of the richer, more expensive coffees are from small, high altitude farms in Central America. Because the farms are smaller, farmers there often don't have enough money to buy the fungicides needed or lack the training to plant in ways that could avoid contamination.

The rust, called "roya" in Spanish, is a fungus that is highly contagious due to airborne fungal spores. It affects different varieties, but the Arabica beans are especially susceptible. Rainy weather worsens the problem.

"We don't see an end in sight anytime soon," said Leonardo Lombardini of Texas A&M's World Coffee Research.

So far, major U.S. coffee companies have been able to find enough supply to avoid price increases. But some smaller outfits already have seen higher prices, said Ric Rhinehart of the Specialty Coffee Association of America.

Rhinehart said the worst-case scenario is that consumers eventually will pay "extraordinarily high prices for those coffees, if you can find them at all."

He said some very specialized varieties from a single origin — Guatemalan antigua coffees, for example — have been much harder to source. If the problem continues, he says, some small coffee companies either will raise prices or use blends that are easier to find, decreasing the quality of the coffee.

Larger companies such as Starbucks and Keurig Green Mountain Inc. have multiple suppliers across the region and say they have so far been able to source enough coffee.

"It's a little bit too soon to tell what the impact will be on supply and long term quality over time," said Lindsey Bolger, who heads up coffee sourcing for Keurig Green Mountain.

Still, the companies are trying to ensure that their future supply isn't affected, so they are working closely with growers on better practices that will help them avoid contamination.

"Supporting the farmer's ability to access information, technology and resources allows them to adapt to these uncertainties and ensures the longevity of our industry's supply chain," said Craig Russell, Starbucks Global Coffee executive vice president. Starbucks even bought a Costa Rican farm for research purposes.

USAID intends to work with Texas A&M to step up research on rust-resistant coffee varieties and help Latin America better monitor and respond to the fungus. The U.S. already collaborates with some of the coffee companies and other international organizations to finance replanting of different varieties of trees.

The effort is part of the Obama administration's Feed the Future program, which aims to rid the world of extreme poverty through agricultural development and improved nutrition.

While the effort has helped hungry children around the globe, "we're at risk of backtracking because of coffee rust," Shah says.

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