بررسی تاثیرات اسانس آویشن بعد از تجویز واکسن لاسوتا بر آسیب‌شناسی بافتی نای، ایمنی هومورال و عملکرد جوجه‌های گوشتی
محورهای موضوعی :
آسیب شناسی درمانگاهی دامپزشکی
سامان فرامرزی
1
,
آرش خاکی
2
1 - دانش‌آموخته دانشکده دامپزشکی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران.
2 - دانشیار گروه پاتوبیولوژی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران.
تاریخ دریافت : 1392/12/16
تاریخ پذیرش : 1394/09/30
تاریخ انتشار : 1394/09/01
کلید واژه:
بیماری نیوکاسل,
گیاه آویشن,
واکسن لاسوتا,
چکیده مقاله :
آویشن گیاهی است که بر سیستم تنفسی موثر می‌باشد. هدف از این مطالعه، بررسی تاثیر اسانس آویشن بر عوارض حاصل از واکسن لاسوتا بر بافت نای، سیستم هومورال و عملکرد گله‌های گوشتی می باشد. در این مطالعه 300 قطعه جوجه گوشتی نژاد راس 308 (Ross 308) به طور تصادفی در سه گروه 100 قطعه‌ای تقسیم شدند. در گروه اول اسانس آویشن (ppm50) دو روز قبل و بعد از واکسیناسیون لاسوتا استفاده شد. در گروه دوم تنها از واکسن لاسوتا استفاده شد. در گروه سوم برای مقایسه بین شدت عوارض واکسن لاسوتا نسبت به واکسن B1، از واکسن B1 استفاده شد. در روز 42 دوره مطالعه از بافت نای جهت آسیب شناسی بافتی نمونه برداری انجام شد. همچنین، تیتر حاصل از واکسن‌های نیوکاسل و عملکرد جوجه ها بررسی شد. اسانس گیاه آویشن باعث کاهش عوارض پاتولوژیک حاصل از واکسن در نای جوجه ها گردید. در گروه دریافت کننده واکسن B1 هیچ گونه عارضه بافتی مشاهده نشد. ضریب تبدیل غذایی، میزان دان مصرفی و وزن نهایی در گروه تیمار با آویشن به طور معنی‌داری نسبت به گروه دریافت کننده واکسن لاسوتا بهبود یافت (05/0p<). استفاده از اسانس آویشن تاثیری بر تیتر حاصل از واکسن لاسوتا نداشت، ولی میزان تیتر آنتی‌بادی در گروه دریافت کننده واکسن B1 به طور معنی‌داری کمتر از دو گروه دیگر بود (05/0p<). بر اساس نتایج به دست آمده، اسانس آویشن باعث بهبود عملکرد گله‌های گوشتی و همچنین کاهش عوارض پاتولوژیک نای حاصل از واکسن لاسوتا می‌شود.
چکیده انگلیسی:
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 essence 2 days prior to and after LaSota vaccination. In the second group only LaSota vaccine was used, and in the third group B1 vaccine was used to compare its severity to the LaSota vaccine. Finally at the end of production period (42 days) samples were taken from trachea for histopathology and also titer of Newcastle vaccine and the performance of chicks were investigated. Results of this study showed that thyme essence decreased histopathologic changes due to vaccination reaction in the trachea. Histopathologic alteration was not observed in B1 vaccination group. In view of feed conversion ratio, feed consumption and final body weight in thyme group there was significant improvement in comparison to LaSota group (p<0.05). But use of thyme essence did not have any effect on titer of LaSota vaccine, although mean antibody titer in B1 vaccine group was significantly lower than the other two groups (p<0.05). Based on the results of our study, thyme essence improved the performance of broiler chicks and decreased hemorrhage, necrosis, and edema of the trachea due to LaSota vaccine reaction.
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