20 آذر 1403
عنايت رحمت نژاد

عنایت رحمت نژاد

مرتبه علمی: استادیار
نشانی: دانشکده مهندسی کشاورزی - گروه مهندسی علوم دامی
تحصیلات: دکترای تخصصی / تغذیه طیور
تلفن: -
دانشکده: دانشکده مهندسی کشاورزی

مشخصات پژوهش

عنوان Effects of cinnamon, rosemary and oregano on growth performance, blood biochemistry, liver enzyme activities, excreta microbiota and ileal morphology of Campylobacter jejuni-challenged broiler chickens
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
blood profile, broiler chickens, Campylobacter jejuni, ileal morphology, performance, phytogenic additives
مجله VETERINARY MEDICINE AND SCIENCE
شناسه DOI https://doi.org/10.1002/vms3.70034
پژوهشگران زهرا علیمحمدی (نفر اول) ، حسن شیرزادی (نفر دوم) ، کامران طاهرپور (نفر سوم) ، عنایت رحمت نژاد (نفر چهارم) ، علی خطیب جو (نفر پنجم)

چکیده

Abstract Background: Phytogenic additives would be helpful to mitigate the detrimental impact of Campylobacter jejuni on broiler chickens. Objective: The experiment aimed to assess the effects of cinnamon, rosemary and oregano powder on physiological responses of broiler chickens challenged with C. jejuni from 0 to 42 days of age. Methods: A total of 192 one-day-old male broiler chickens were divided into 6 treatment groups. The treatments included: negative control (NC; basal diet without additives and no C. jejuni challenge), positive control (PC; basal diet with C. jejuni challenge), PC with cinnamon, rosemary or oregano powder (3 g/kg each), and PC with Erythromycin (55 mg/kg). Except for the NC group, all chicks were orally challenged with 2 × 108 CFU/mL C. jejuni daily from days 21–25. Feed intake, body weight gain (BWG), feed conversion ratio (FCR), energy efficiency ratio (EER) and protein efficiency ratio (PER) were assessed during the rearing period (0–42 days). On day 42 of age, fresh excreta samples were collected from each pen to determine apparent dry matter digestibility and excreta microbiota. In addition, at the end of the experiment, blood samples were collected to evaluate blood profile and liver enzyme activities. Results: C. jejuni challenge (PC treatment) decreased BWG, EER and PER, while increasing FCR of broiler chickens (p < 0.05), whereas rosemary, oregano and Erythromycin improved these performance parameters akin to NC. PC diet showed negative effect in ileal morphology, alleviated by additives except cinnamon (p < 0.05). Dietary additives successfully reduced Campylobacter levels and increased Lactobacilli counts in the PC. Rosemary and oregano lowered plasma total cholesterol (p < 0.05). Alanine aminotransferase elevation by C. jejuni challenge in the PC group was prevented by rosemary, oregano and Erythromycin (p < 0.05).