In addition, the FDA has increased the case counts in 2 other multistate E coli outbreaks.
Seven cases have been related to pregnancy.
A CDC- and FDA-led investigation found the outbreak, which sickened 104 people in 14 states, was likely caused by slivered onions supplied by Taylor Farms.
Of 33 people interviewed by health officials, 27 (82%) reported eating cucumbers in the days prior to illness.
In California, one pregnant woman and her twins were sick, and both infants died.
In other developments, the USDA confirmed more poultry outbreaks in 5 states, including commercial farms in California and Utah.
The latest report on the 19-state outbreak noted 2 more cases, 61 total.
Countries reporting the latest outbreaks are Iraq, Lebanon, and South Sudan.
The carrots were sold under different brands at a number of popular retailers in the US and Canada, including Trader Joe's, Wegman's, and Safeway.
The researchers found foodborne pathogens that had formed colonies of pathogens in a sticky biofilm in three common types of plastic in raw and treated wastewater.
