نویسنده: دکتر فخرالدین عابد، متخصص تغذیه دام و طیور
Fardin.abed@gmail.com
مدیر مارکتینگ و تحقیقات شرکت لعل حیات وسام
بیش از چندین دهه انتخاب ژنتیکی برای شاخص های عملکردی مانند سرعت رشد، موجب به وجود آمدن نژادهای حساس تر به عفونت ها شده است (Huff et al., 2005). به عبارت دیگر، انتخاب برای رشد سریع، به شدت موجب کاهش پاسخ های سیستم ایمنی به چالش های عفونی شده است (van der Most, de Jong, Parmentier, & Verhulst, 2011). سویه های جدید مرغ و بوقلمون با رشد سریع، نسبت به سویه های وحشی و با رشد آهسته دارای سیستم ایمنی اکتسابی ضعیف تر (تولید آنتی بادی)، اما دارای پاسخ های التهابی با واسطه سلولی بیشتر هستند.
این امر می تواند موجب ناکارآمدی سیستم ایمنی در برابر باکتری ای بیماری زا باشد و اغلب تاثیرات نامطلوبی بر روی مصرف خوراک و شاخص های عملکردی می گذارد. (Cheema, Qureshi, & Havenstein, 2003). یکی از بحرانی ترین زمان ها در پرورش طیور، سنین ابتدایی بعد از خروج از تخم است زیرا پرنده هنوز سیستم ایمنی قدرتمندی در برابر عوامل بیماری زا ندارد. نتایج تحقیقات نشان داده که در سنین ۴ تا ۷ روزگی، برخی از اعمال سیستم ایمنی مانند نابودی باکتری ها از روش اکسیداتیو توسط گلوبول های سفید، در نژادهای جدید نسبت به نژادهای وحشی، کاهش قابل ملاحظه ای یافته است. (Genovese, He, Lowry, Swaggerty, & Kogut, 2006).
56 دیدگاه ها
Excellent, what a webpage it is! This web site provides useful information to
us, keep it up.
Hi, its pleasant article about media print, we all be familiar with media is a wonderful source of information.
When some one searches for his required thing, thus he/she needs to be available that in detail, thus that thing is maintained over here.
I am truly thankful to the owner of this site who has shared this enormous piece of writing at here.
I was suggested this blog through my cousin. I’m now not positive whether this put up is written via him as nobody else recognise
such distinctive about my problem. You’re amazing!
Thanks!
My site … Hope
Hmm is anyone else encountering problems with
the pictures on this blog loading? I’m trying to determine if its a problem on my end or
if it’s the blog. Any responses would be greatly appreciated.
online pharmacy https://pharmaciescegs.com/ pharmacy
My brother suggested I would possibly like this website.
He was once entirely right. This put up truly made
my day. You cann’t believe simply how a lot time I had spent for this information! Thanks!
Take a look at my website: blog, https://browser.geekbench.com,
This article is actually a fastidious one it assists new the web
users, who are wishing for blogging.
Today, while I was at work, my cousin stole
my iphone and tested to see if it can survive a 25 foot drop, just
so she can be a youtube sensation. My apple ipad is now destroyed and she has 83 views.
I know this is entirely off topic but I had to
share it with someone!
I am not sure where you’re getting your information, but
great topic. I needs to spend some time learning more or understanding
more. Thanks for fantastic info I was looking for this information for
my mission.
Have you ever thought about creating an e-book or guest
authoring on other blogs? I have a blog centered on the same information you discuss
and would love to have you share some stories/information. I know my readers would
enjoy your work. If you’re even remotely interested, feel
free to shoot me an e-mail.
Wow that was odd. I just wrote an very long comment but after I clicked submit
my comment didn’t show up. Grrrr… well I’m not writing all that over again. Anyways, just wanted to say fantastic blog!
Good post. I learn something new and challenging on sites I stumbleupon every
day. It will always be helpful to read articles from other authors and practice a little
something from their websites.
I am in fact happy to read this webpage posts which carries plenty of useful
facts, thanks for providing such statistics.
Its not my first time to visit this web page, i am browsing this website dailly and take
pleasant facts from here everyday.
Hello everyone, it’s my first pay a quick visit at this site, and piece of writing is actually fruitful designed for me, keep up posting these types of posts.
Superb blog! Do you have any hints for aspiring writers?
I’m planning to start my own site soon but I’m a little lost on everything.
Would you propose starting with a free platform like WordPress or go for a
paid option? There are so many options out
there that I’m completely confused .. Any tips? Kudos!
Dear Anthony,
Thank you very much for your kindness.
Our site is not free, but you can start with a free platform.
Accurately informs you of the lunar cycle on a second by second basis.
Accurately informs you of the lunar cycle on a second by second basis.
If some one wants expert view about running a blog afterward i propose him/her to
pay a visit this webpage, Keep up the good work.
Dear Alice,
Thank you very much for your kindness.
Hi! I know this is somewhat off topic but I was wondering if you knew where I could locate a captcha plugin for my comment form?
I’m using the same blog platform as yours and I’m having problems finding one?
Thanks a lot!
Sweet blog! I found it while browsing on Yahoo News. Do you have any tips on how to get listed in Yahoo News?
I’ve been trying for a while but I never seem to get there!
Thank you
Awesome watch. Very happy with my purchase. Smart and subtle.
beautiful, but due to the strap being silver it slides and doesn’t stay in place.
Dear Delmar,
Thank you very much for your attention and kindness.
Please send your suggestions to improve the sites content.
Thanks for finally writing about > ایمن سازهای تغذیه
ای، یک استراتژی ویژه در صنعت پرورش طیور
< Liked it!
For the price, a great deal. A simple, stylish watch that is also functional. Good for everyday use.
If some one wishes expert view regarding blogging then i suggest him/her to visit this website, Keep up the fastidious work.
I simply couldn’t depart your web site prior to suggesting that I really enjoyed the usual info a person supply
for your guests? Is gonna be back steadily in order to
inspect new posts
Beautiful and accurate. I’ve received several compliments on the watch.
Ahaa, its nice conversation regarding this post here at this weblog,
I have read all that, so at this time me also commenting here.
Also visit my blog … Lisette
Dear Lisettle,
Thank you very much for your attention and kindness.
Great post.
Thank you very much for kindness
Hello it’s me, I am also visiting this website
daily, this web site is truly nice and the users are genuinely sharing fastidious thoughts.
Dear Julie,
Thank you very much for your attention.
Please present your suggestions for improving the site.
This article is in fact a good one it assists new the web visitors, who are wishing in favor of blogging.
Dear George,
Thank you very much for your kindness to our site.
Please present your suggestions for improving the site.
An intriguing discussion is worth comment. I do believe that
you ought to write more on this subject matter, it might not be a taboo subject but typically folks don’t
talk about such topics. To the next! Best wishes!!
Dear Logan,
Thank you very much for your attention.
We will update our articles soon.
Please present your suggestions for improving the site.
I’m really loving the theme/design of your weblog.
Do you ever run into any internet browser compatibility issues?
A couple of my blog readers have complained about my blog not operating correctly in Explorer but looks great in Safari.
Do you have any advice to help fix this issue?
You should take part in a contest for one of the best blogs
on the net. I will highly recommend this site!
Aw, this was a really good post. Taking a few minutes and actual effort to create a top notch article… but what
can I say… I procrastinate a lot and never seem to get nearly anything done.
A person essentially lend a hand to make severely posts I would state.
That is the very first time I frequented your website page and so far?
I surprised with the analysis you made to make this particular put up amazing.
Wonderful process!
Excellent post. I was checking continuously this blog and I am impressed!
Extremely helpful information specifically the last part 🙂 I care for
such info much. I was looking for this certain info for a
long time. Thank you and best of luck.
Please let me know if you’re looking for a author for your
blog. You have some really good posts and I believe I would be a good asset.
If you ever want to take some of the load off, I’d love to write some
content for your blog in exchange for a link back
to mine. Please blast me an e-mail if interested. Many thanks!
You actually make it seem so easy with your presentation but I find this matter to be actually something which I think I would never understand.
It seems too complicated and very broad for me. I’m looking forward for your next post,
I will try to get the hang of it!
I all the time emailed this website post page to all my friends, because if like to read it after that
my friends will too.
Pretty section of content. I just stumbled
upon your web site and in accession capital to assert
that I acquire in fact enjoyed account your blog posts.
Any way I will be subscribing to your augment and even I achievement you access consistently fast.
This is very interesting, You’re a very skilled blogger.
I’ve joined your rss feed and look forward to seeking more of your magnificent post.
Also, I have shared your web site in my social networks!
whoah this weblog is fantastic i really like reading your articles.
Keep up the good work! You know, a lot of individuals are
searching round for this information, you could help them greatly.
With havin so much written content do you ever run into any problems of plagorism or
copyright violation? My blog has a lot of unique
content I’ve either authored myself or outsourced but it seems a lot of it is popping
it up all over the internet without my permission. Do you know any ways to help stop content from being ripped off?
I’d certainly appreciate it.
whoah this blog is magnificent i love reading your articles.
Stay up the great work! You realize, lots of individuals
are looking round for this info, you can help them greatly.
Howdy very nice blog!! Guy .. Excellent .. Superb .. I will bookmark your blog and take the feeds additionally?
I’m glad to find so many helpful information right here within the submit, we need
develop more strategies in this regard, thank you for sharing.
. . . . .
My site Buy CBD