Role of thyroid hormones, maternal antibodies, and antibody response in the susceptibility to colibacillosis of broiler genotypes

Landbrug og biologi

• maternal immunity 100%
• thyroid hormones 79%
• antibody formation 73%
• broiler chickens 60%
• genotype 44%
• chicks 39%
• triiodothyronine 39%
• antibodies 32%
• L-thyroxine 27%
• eating habits 26%
• hypothyroidism 16%
• Escherichia coli 15%
• growth traits 13%
• thyroxine 13%
• circadian rhythm 12%
• growth retardation 10%
• lesions (animal) 9%
• genetic variation 7%