Identifying blood components influenced by rearing systems that serve as biomarkers to distinguish free-range from conventional broilers can improve animal health, welfare, and productivity. The current study aimed to evaluate specific blood parameters related to immune function and tissue stress, as biomarkers to differentiate free-range, slow-growing Sasso broilers from conventionally raised fast-growing Ross 308 broilers. For this purpose, serum IgM Natural Antibodies (NAbs) targeting actin and lipopolysaccharides (LPS) as key immunological parameters of natural immunity, along with creatine phosphokinase (CPK) and other significant stress and tissue-related biochemical parameters, were measured in a total of 300 broilers (150 per group) raised under industrial scale rearing systems, by standard methodology. Our results showed significantly higher IgM-NAb levels to both antigens and lower CPK and Aspartate Aminotransferase levels in Sasso broilers compared to Ross 308 broilers ( < 0.001). Combination of anti-LPS IgM-NAbs and CPK levels, as the most potent biomarker candidates, achieved 90% sensitivity and 84% specificity in distinguishing Ross 308 from Sasso broilers. In conclusion, the combined evaluation of these blood biomarkers can effectively discriminate conventional from free-range broilers analyzed herein, with potent novel applications in the poultry industry making it a promising, cost effective and easy-to-use, diagnostic tool.
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| http://dx.doi.org/10.3390/ani14213070 | DOI Listing |
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