JACKSON, Mississippi — The U.S. State Department plans major changes to a foreign exchange program popular with Russians that has been exploited by unscrupulous labor brokers and organized criminals in the sex industry.

The changes were proposed in a Jan. 18 State Department memo that came after an investigation uncovered widespread abuses in the J-1 Summer Work Travel program, or SWT, which annually allows more than 100,000 foreign college students to work in the United States for up to four months.

"The reforms we are undertaking will significantly reduce the opportunities for wrongdoing and catch it much more quickly when it does occur," the memo said.

Some of the most significant changes would be to ban jobs in factories, warehouses and other places like seafood packing plants. The agency also plans on "re-emphasizing the adult entertainment industry prohibition by specifically prohibiting jobs with escort services, adult book/video stores, massage parlors, and strip clubs."

In one of the worst cases of abuse, a woman said she was beaten, raped and forced to work as a stripper in Detroit after being promised a job as a waitress in Virginia.

In August 2011, dozens of workers protested conditions at a candy factory that contracts to pack Hershey chocolates in Hershey, Pennsylvania, complaining of hard physical labor and pay deductions for rent that often left them with little money. Then in December, a federal indictment accused organized crime of using the cultural exchange program to bring Eastern European women to work in New York strip clubs.

Under the J-1 program, foreign students often land jobs at hotels, resorts and restaurants. But they have also worked in places like fish factories and strip clubs. Many of the students end up in resort towns, and in places in the Florida Panhandle, the abuse has been so bad that it helped inspire state legislation.

Participation has boomed from about 20,000 students in 1996 to a peak of more than 150,000 in 2008, and roughly 1 million foreign students have taken part in the past decade. The students come from around the world, with some of the top participating countries being Russia, Brazil, Ukraine, Thailand, Ireland, Bulgaria, Peru, Moldova and Poland.

The proposed changes would require sponsors to "use particular prudence and caution when dealing with jobs that offer legitimate employment but also have been known to be associated with human trafficking, such as janitorial service, housekeeping and modeling agencies."

There's also a provision aimed at protecting American workers, "such as a more precise definition of temporary seasonal employment and a bar against SWT job placements during layoffs or lockouts."

The memo said the rules would be made public around March.

The companies the State Department designated as official sponsors — which charge up to several thousand dollars to arrange visas and jobs for the participants — objected to less significant changes made last year and to the anticipated new restrictions.

"They have told us they are taking these complaints to Congress, though we have yet to see any indication of congressional support for their position," the memo said. "Notwithstanding these potential criticisms, we think a solid case can be made that these changes are needed and that some are needed urgently."

U.S. Secretary of State Hillary Rodham Clinton last year ordered a thorough review of the program, and her department had already made several changes since an Associated Press investigation uncovered living and working conditions that some participants compared to indentured servitude.

In November, it had temporarily stopped accepting any new sponsors and will limit the number of future participants to about 109,000 students. The State Department also revised its rules to require more oversight by its 53 designated sponsors.

But not all of last year's changes have been fully implemented, according to the memo because some students will be "grandfathered" in.

"While this will mean that some participants are treated differently than others for a brief time, to do otherwise, however, would create major problems for our embassies and consulates as placements are canceled — and possibly visas revoked — for students who paid their fees and made their summer plans in good faith," the memo said.

The program was created in 1963 to allow college students from other countries to spend their summer breaks living, working and traveling in the United States all in the name of fostering cultural understanding and showcasing what is great about America.

Most of the abuses over the years have been blamed on unregulated, third-party labor brokers who work with the students. Critics say the students have gotten little help from sponsor companies.

Danielle Grijalva, executive director of the Committee for Safety of Foreign Exchange Students, says she was outraged that the State Department has known about serious problems, but has done little to address the problem.

"This is a memo about problems we've been telling them for years," Grijalva said. "They should never have been working in warehouses and factories. They told us they were going to make changes. But they didn't. This is just wrong."

And she was appalled that some groups may be grandfathered in.

"The State Department keeps promoting the program. What they should do is fix it so no more children will be hurt," she said.