اثرات اسانس مرزنگوش، شاه‌اسپرم، گندواش، رازیانه و کاج بر جوجه‌های گوشتی: اثرات ضدباکتریایی In-Vitro و عملکرد، مورفولوژی ژئوژنوم و جمعیت میکروبی ایلئوم

نوع مقاله : علمی پژوهشی- تغذیه طیور

نویسندگان

1 گروه علوم دامی، دانشگاه ایلام، ایلام، ایران

2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران

3 دانشگاه ایلام

4 دانشگاه علوم پزشکی ایلام

5 دانشگاه شهرکرد

چکیده

اثرات ضد باکتریایی اسانس­های هیدروالکلی مرزنگوش، شاه­اسپرم، گندواش، رازیانه و کاج بر باکتری­های اشریشیاکلی، کلبسیلا پنومونیه و سالمونلا تیفی‌موریوم در شرایط  in-vitroو حیوان زنده مورد ارزیابی قرار گرفت. در آزمایش اول تأثیر اسانس­های هیدروالکلی بر قطر هاله عدم رشد باکتری­های اشریشیاکلی، کلبسیلا پنومونیه و سالمونلا تیفی­موریوم در مقایسه با آنتی­بیوتیک جنتامایسین در محیط in-vitro مورد بررسی قرار گرفت. بر اساس نتایج آزمایش in-vitro، در آزمایش دوم اثر سه اسانس­ هیدروالکلی مرزنگوش، شاه­اسپرم و گندواش بر عملکرد، مورفولوژی و بافت روده و جمعیت باکتری­های دستگاه گوارش مورد بررسی قرار گرفت. تعداد 384 قطعه جوجه گوشتی سویه راس-308 (مخلوط مساوی از هر دو جنس) در قالب طرح کاملاً تصادفی به 8 تیمار، 4 تکرار و 12 قطعه جوجه در هر تکرار اختصاص داده شد. به دلیل اثرات مثبت اسانس‌های مرزنگوش، گندواش و  شاه­اسپرم در آزمایش اول، تیمارهای آزمایش دوم عبارت بودند از: 1) جیره پایه (شاهد)، 2) جیره پایه + 200 میلی­گرم در کیلوگرم آنتی­بیوتیک کلی­استاپ 10، 3 و 4) جیره پایه + 200 و 400 میلی‌گرم اسانس مرزنگوش در کیلوگرم جیره، 5 و 6) جیره پایه + 200 و 400 میلی‌گرم اسانس گندواش در کیلوگرم جیره و 7 و 8) جیره پایه + 200 و 400 میلی‌گرم اسانس شاه­اسپرم در یک کیلوگرم جیره. در هفته دوم جوجه­های هر تکرار به 3 گروه 4 تایی تقسیم شدند و با یک میلیلیتر محلول حاوی 109×1 cfu  باکتری­­های اشریشیا­کلی و سالمونلا تیفی­موریوم از طریق خوراکی آلوده شدند. نتایج آزمایش اول نشان داد که در مقایسه با اسانس‌های کاج و گندواش، اسانس­های رازیانه، شاه­اسپرم و مرزنگوش مانع رشد باکتری‌های اشریشیاکلی و سالمونلا تیفی­موریوم شدند و در مقایسه با آنتی­بیوتیک جنتامایسین، بیشترین قطر هاله عدم رشد مربوط به اسانس شاه‌اسپرم بود. نتایج آزمایش دوم نشان داد که افزودن اسانس­ها به جیره جوجه‌های گوشتی موجب بهبود مقادیر خوراک مصرفی روزانه و افزایش وزن و عدم تأثیر بر ضریب تبدیل خوراک جوجه­های گوشتی آلوده شده، شدند. افزودن اسانس مرزنگوش سبب افزایش درصد لنفوسیت و کاهش نسبت هتروفیل به لنفوسیت در جوجه­های آلوده شده با باکتری­ اشریشیا­کلی شد. اسانس­ها سبب افزایش جمعیت باکتری­های لاکتوباسیل جوجه­های سالم و کاهش جمعیت باکتری اشریشیا­کلی در گروه آلوده شده با باکتری­ اشریشیا­کلی شدند. به­طور کلی، آنتی­بیوتیک قابلیت جایگزینی با اسانس­ها را دارد و قادر به کاهش اثرات نامساعد سالمونلوز و کلی­باسیلوز در جوجه­های گوشتی شد.

کلیدواژه‌ها


عنوان مقاله [English]

Use of essential oils in broiler chickens: In-vitro antimicrobial activities and effects on growth performance, intestinal morphology and microflora

نویسندگان [English]

  • Ali Khatibjoo 1
  • Maryam Aalaei 2
  • Farshid Fattahnia 3
  • Mostafa Neamati 3
  • Mohammad reza Hafezi Ahmadi 4
  • Hooman Farzadi 5
1 Department of Animal Sciences, Ilam University, Ilam, Iran
2 Department of Animal Sciences, Faculty of Agriculture, Ilam University, Ilam, Iran
3 Ilam University
4 Ilam Medical University
5 Shahrekord University
چکیده [English]

Introduction: Antibiotics as growth promoters in poultry feed are posing serious health risks to human health. Because of their residual effects in poultry meat and eggs, as well as result pathogens develop resistance to antibiotics. Currently, poultry scientists are challenged to find out alternatives to antibiotic growth promoters with no side effects for poultry that could be more or as effective against harmful microorganisms in the gastrointestinal tract and to stimulate the growth by increasing the efficiency of feed utilization and to enhance the immunity. Regarding to this subject, supplementing the dietary herbs or plant extracts would stimulate the productive performance of poultry. In recent years, products containing essential oils derived from several spices and herbs could be used feed additives as growth promoters in animal nutrition. These phytogenic additives may have more than one mode of action, including improving feed intake and flavor, stimulating the secretion of digestive enzymes, increasing gastric and intestinal motility, endocrine stimulation, antimicrobial, anti-viral, anthelminthic and coccidiostat activities, immune stimulation, and anti-inflammatory and anti-oxidative activity and pigments. Many studies have also been conducted on the effects of dietary essential oils or combinations thereof on the performance of poultry but with varying and conflicting results. While one report demonstrated that essential oils improved animal performance, some researchers reported that these additives were not effective in this regard. Salmonella and Escherichia Coli bacteria have become the major cause of foodborne diseases which has raised a great safety concern to public health. In several geographic regions, a large proportion of foodborne diseases are confirmed by the hazardous salmonellosis caused by infectious Salmonella. The antibacterial effects of essential oils have received widespread attention and numerous reports exist in the literature. The essential oil of oregano has been shown to inhibit Escherichia coli, Staphylococcus aureus, Salmonella typhimurium, Staphylococcus aureus and Listeria monocytogenes. The aims of this study were to investigate the In-Vitro and In-Vivo effects of 5 dietary essential oils, marjoram, tanacetum balsamita, Artemisia annua, Fennel and Pinus, on minimal bactericide concentration (MBC) and minimal inhibitory concentration (MIC) of 5 bacteria strains including Escherichia coli (PTCC 1399), Klebsiella pneumonia (PTCC 1053), Salmonella typhimurium (PTCC1609), Staphylococcus aureus (PTCC 1764) and Streptococcus pyogenes (PTCC 1447) and performance and intestinal microflora of broiler chickens challenged with Salmonella typhimurium and Escherichia coli.
Materials and Methods: The disc diffusion method, the minimum inhibitory concentration (MIC), and the minimum bactericidal concentration (MBC) were applied for the determination of antimicrobial activities of essential oils. In vivo study, a total of three hundred eighty four 1-d-old broiler chickens were assigned to 8 dietary treatment groups: 1) Control= basal diet, 2) Control + Virginiamycin (200 mg/Kg), 3 and 4) Control+ Marjoram Hydro alcoholic essential oil (200 and 400 mg/Kg), 5 and 6) Control+ Fennel hydro alcoholic essential oil (200 and 400 mg/Kg) and 7 and 8) Control+ Tanacetum Balsamita Hydro alcoholic essential oil (200 and 400 mg/Kg). At the second week of life (8-14 d) the broilers of each replicate in all of the treatments divided to 3 part (4 broilers in each treatment) and one group had no challenge, and the 2 other groups were challenged with challenged with Escherichia coli and Salmonella typhimurium. Essential oils were provided by Giah-Essanse Company in Golestan Province. The diets were formulated to meet the requirements of broilers as established by the Ross 308 broilers feeding guide in starter (1-14 d). The birds were kept under conventional conditions for vaccination, temperature, ventilation, and lighting based on Ross 308 catalogue recommendations. Standard management practices of commercial broiler production were applied. The broiler diets were formulated based on standardized ileal digestible amino acids and other requirements were obtained from Ross catalogue recommendations. Broiler chicken performance (feed intake, body weight gain, feed conversion efficiency at the end of the first and second week of age), blood cell count and ileal morphology were measured. Finally population of Lactobacillus and Escherichia coli of ileum were detected.
Results and Discussion: The results showed that fennel, tanacetum and marjoram essential oils inhibited the growth of Escherichia coli and Salmonella typhimurium and the greatest MBC belonged to tanacetum essential oil as compared to virginiamycin. Inclusion of essential oils improved feed intake and body weight gain of broiler chickens changed with Escherichia coli and Salmonella typhimurium. Escherichia coli-challenged broiler chickens fed diet supplemented with essential oils had higher lymphocyte percentage and lower heterophil to lymphocyte ratio as compared to control group. Essential oils significantly increased Lactobacillus and decreased Escherichia coli count of healthy and Escherichia coli challenged broiler chickens compared to control group respectively. 
Conclusion: In conclusion, supplementation of essential oil had MIC and MBC effects and improved growth performance of broiler chickens challenged with Escherichia coli and Salmonella typhimurium. It is suggested that these essential oils can be supplemented to broiler chickens diet as substitution of antibiotics.
 

 

کلیدواژه‌ها [English]

  • Broiler chicken
  • Essential oil
  • Escherichia coli
  • Growth performance
  • Salmonella Typhimurium
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