Food Safety News reports that a vaccine to protect against Campylobacter jejuni was recently approved for human clinical trials by the U.S. Food and Drug Administration.

Campylobacter is a major cause of bacterial diarrhea worldwide — estimated to be the cause of 4-15 percent of cases. It’s a problem in both developed and developing countries and is associated with unpasteurized dairy products, contaminated water, poultry and produce.

In the U.S., the Centers for Disease Control and Prevention estimates that campylobacteriosis affects more than 1.3 million people every year.

Although Campylobacter infections are generally mild, complications can include reactive arthritis neurological disorders such as Guillain-Barré syndrome, a disorder in which the body’s immune system attacks part of the peripheral nervous system.