Two consecutive large outbreaks of Salmonella enterica serotype Agona infections in infants linked to the consumption of powdered infant formula.

Background: An increase of isolation of Salmonella Agona was observed in January through February 2005 among infants in France.

Methods: Case-control study, food trace-back and microbiologic investigations were promptly carried out.

Results: A total of 141 confirmed cases <12 months of age were identified.