Researchers suggest farmers should consider harvesting when fields are dry, to prevent dangerous bacteria blooms from contaminating food. Christopher Intagliata reports
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In 2011 a 28-state outbreak of from cantaloupes infected . After that, many Americans evidently thought twice about bringing one of the melons home—cantaloupe consumption after the infections. But paying closer attention to the of our fields—like tracking when they've been rained on—could be a step toward beating bacteria, and preventing that sort of . So says a study in the journal . [Daniel Weller et al, ]
Researchers monitored spinach fields in New York State, both before and after irrigation and rain. And they found that levels of bacteria in the soil spiked in the 24 hours after water hit the field—up to the levels that were present a week after the rain.
The scientists cite two factors. is exceedingly common in the environment—from the soils of national parks to, yes, irrigation water. So could be getting dumped directly on fields during irrigation. But rain also creates more favorable conditions for a bacterial bloom—and that holds for any type of bacteria present in the soil, the researchers say—whether or the studied here.
The lesson for farmers, they say? Hold off on harvesting after rains or watering. And if you can't wait—consider rinsing the fruits or veggies after they come off the field. The researchers are developing a web app that'll help farmers forecast bacterial loads in their fields—to make sure that the only thing that makes it farm to table is your food, and not infections.
—Christopher Intagliata
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