Comparison effects of some chemical and herbal commercial medicines on the immune system and reduce respiratory damage in chickens challenged with infectious bronchitis vaccine

A research was conducted to evaluate the effects of some commercial herbal and chemical medicines on immune system and improve the respiratory disorders in broiler chickens. Four hundred and fifty day old female broiler chicks (strains of Arian) were divided into experimental groups: 1) Anzofin®، 2) Antibiofin®، 3)Immunofin®، 4) Bronkofin®، 5) savory (Zagrol®)، 6) Mentofin®، 7) Enrofloxasin®، 8) Bromhexin®، 9) Positive control، and 10) Negative control. On day 14، treatments 1 to 9 were received IB- 4/91vaccine 5 times greater than the standard dose and Negative control received the standard dose of IB vaccine. Treatments 1 to 6 received herbal medicines via drinking water from day 15 until day 42. Treatment 7 and 8 were received chemical medicines from day 15 to day 19. The highest and lowest antibody titter against infectious bronchitis was observed in Negative control and Immunofin، respectively (P>0. 05). On 41 days of age there was significant difference between treatments Antibiofin® and Mentofin® (P>0. 05). Anzofin® treatment showed highest antibody titer against Newcastle virus in both periods of 36 and 42 day old (P>0. 05). The highest and lowest response to injection of phytohemaglotinin was observed in Immunofin® and Positive control، respectively (P<0. 05). The highest H/L ratio was observed in positive control (P<0. 05). About improving the respiratory disorders among herbal medicine the influence of Mentofin®، Antibiofin® and savory was better than others and was the same with influence of Enrofloxasin® antibiotic and Bromhexin®.