Increase in Salmonella cases suggest persistent contamination source Posted on September 12, 2017 by admin An increase in Salmonella Chester cases each summer could point to persistent sources of contamination in Morocco and other West African countries, possibly from seafood Post navigation Multistate Outbreak of Salmonella Kiambu Infections Linked to Imported Maradol PapayasDangerous antibiotic-resistant infections on the rise for children in the U.S., study finds