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The peptides could provide an alternative approach to antibiotics for controlling Salmonella in chickens and chicken products, which are the primary vehicle for Salmonella infections in people, according to the research report. In a paper published in the journal Microbiology Spectrum, the researchers reported that three small peptides derived from Lactobacillus rhamnosus GG inhibited the growth of Salmonella serovars Typhimurium and Enteritidis —the top Salmonella serovars isolated in human infections — in a series of lab experiments. The researchers tested the efficacy of the peptides in a flock of layer chickens who were challenged with Salmonella Typhimurium. We identified two antimicrobial peptides that kill many different types of Salmonella and also reduce Salmonella load in chickens," corresponding study author Gireesh Rajashekara, PhD, said in a statement from the journal publisher the American Society for Microbiology."