This meta-analysis evaluated the use of potential dietary feed additives (pDFA) with antibacterial effectsand their impact on the perfomance of weaned piglets. Twenty-three peer-reviewed in vivo studies,comprising 50 trials, were identified between January 2010 and January 2017. The pDFA in these studiescould be grouped in 5 classes: antimicrobial peptides, chitosan, lysozyme, medium chain fatty acids/triglycerides and plant extracts. Mixed-effect meta-analyses with type of pDFA as fixed effect wereperformed for the growth parameters ‘average daily gain’ (ADG) and ‘feed conversion ratio’ (FCR), whichare the two most important and used economic performance parameters for farmers.

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