Study on the effects of essential oil of Thymus vulgaris after administration of the LaSota vaccine on histopathological status of the trachea, humoral immune system and the performance of broilers
Thyme is a herb with effects on the respiratory system.The aim of the current study was to investigate the effects of thyme essence on trachea, humoral immunity, and the performance of broilers following LaSota vaccination.In this study, 300 Ross 308 broiler chicks were divided into 3 groups of 100 chicken.The first group received 50 ppm thyme esse