The outbreak has sickened 109 people in 29 states, according to the CDC.
The FLiRT variants are fueling new COVID-19 waves in some countries, but so far US markers don't show major upticks.
The illnesses were caused by Campylobacter, Salmonella, E coli, or Listeria monocytogenes.
Two of the 12 patients developed hemolytic uremic syndrome, a serious and potentially fatal kidney condition.
Uncooked chicken had the highest levels of antibiotic-resistant E coli, with similar levels found in chicken-based raw dog food.
The products, which appear pre-browned and cooked, are often cooked from a frozen state, which increases the chance that the raw chicken component may not reach a safe internal temperature.
So far 12 illnesses in 7 states are confirmed in the outbreak.
Data on Salmonella and Campylobacter bacteria from people and food-producing animals show high levels of resistance to commonly used antibiotics.
At least 10 people have been sickened by E coli in an outbreak tied to raw milk cheese, and a Salmonella outbreak linked to charcuterie meats has grown to 70 cases.
Oral cholera vaccine shortages are still critical, with the global stockpile depleted.
