Of the four major brands, for example, Foster Farms chickens were least likely to have salmonella--and most likely to have campylobacter.
(Foster Farms chickens; were; least likely to have salmonella--and most likely to have campylobacter) (Foster Farms chickens; to have; salmonella--and most likely to have campylobacter)
Foster Farms chickens Foster Farms chickens
were to have
least likely to have salmonella--and most likely to have campylobacter
salmonella--and most likely to have campylobacter