Salmonella control in feed

I have just finished reading a comprehensive review on practical control measures against Salmonella in animal feed. This review, by Jones (2011, Journal of Applied Poultry Research, 20:102-113), clearly indicates that thermal treatment (usually pelleting) alone is not enough to eliminate Salmonella.   Additions of chemical products (such as certain organic acids and/or formaldehyde) are also recommended in combination or alone. Other measures are also proposed to (a) reduce the chances of Salm