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Heat stress: underlying mechanism and mitigation by yeast paraprobiotics

Published: May 28, 2018
Summary
Heat stress pathophysiology As birds are homeothermic animals, they are able to maintain a relatively constant body temperature by balancing the production and dissipation of heat within their body. The maintenance of a constant body temperature is regulated by thyroid hormones of which the concentration is regulated by the hypothalamus – pituitary – thyroid axis (HPT) of the ...
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Authors:
Ruth Raspoet
Phileo by Lesaffre
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isaac bulemu
29 de mayo de 2018
Thank you for sharing this good work.
Atef Abou Zead
30 de mayo de 2018
Thanks Excellent review
Atef Abou Zead
30 de mayo de 2018
But I would to ask what is the best for heat stress betaglucan or mannan oligosaccharides?
Ruth Raspoet
Phileo by Lesaffre
1 de junio de 2018
Dear, For heat stress mannans will be more adequate then B-glucans B-glucans have an anti-inflammatory effect and will help to preserve tight junctions. However, mannans seem to have a broader effect as they help to maintain gut integrity and are able to bind different types of pathogenic bacteria. As such, translocation of bacterial fragments will be reduced and the immune system will be less stimulated.
Muhammad Salman Akram
Sis chemicals
4 de junio de 2018

Ruth Raspoet which yeast you use in safmannan?

Ruth Raspoet
Phileo by Lesaffre
7 de junio de 2018
Safmannan is a premium yeast fraction coming from a proprietary saccharomyces cerevisiae bakery strain. Its unique manufacturing process guarantees more than 20% mannan-oligosaccharides and more than 20% ß-glucans. This batch to batch consistency leads a consistent effect.
Dr. Fiodor S. Marchenkov
Kronos -Agro private company
2 de junio de 2018

Dear all, stress generally and heat stress, for instance, has a lot of aspects. Regulation by hormones is only one of these aspects. The same important is hyperosmotic stress, dehydration of the cells. When it is not enough water inside the cell, hormones and immunostimulators will be not effective. In my opinion, it is a reason to combine yeast glucans of mannans with the cell osmolytes like betaine.

Dr Ajay Bhoyar
EW Nutrition
4 de junio de 2018

Excellent information from all the contributors. Dr. Fiodor has mentioned a very important point in heat stress management. Indeed, both the poultry house management (lowering house temperature, managing feeding time, air movement, etc) as well as nutritional adjustment (nutrient density and source of nutrients, inclusion of electrolytes and Vitamin C, etc) plays a vital role in lowering the impact of heat stress. A natural response to heat stress by poultry is to reduce the feed consumption, which ultimately affects performance. The source of methionine can also make a difference during heat stress. HMTBa as a source of methionine has been shown to be more effective than DLM in preventing the characteristic depression in bird’s performance during heat stress. Since HMTBa is absorbed by diffusion, and there is no energy requirement or heat production associated with diffusion, birds are able to better absorb HMTBa during heat stress with a minimal amount of physiological stress. This aspect is critical as the absorptive surface area of the small intestine is reduced by high temperatures and this may play a role in performance during and following heat stress.

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Pat Welch
Pat Welch
6 de junio de 2018
Dr Ajay Bhoyar This is especially important in tropical and sub-topical climates where reducing heat increment plays an important role in reducing metabolically induced heat stress.
Johar Khan
5 de junio de 2018
Very informative.
Dr. Raúl Cortés Coronado
5 de junio de 2018

Mannan and B-glucans, also proteins are part of Yeast wall that you may not spare. This mix of product are the key part of yeast attach to TLR2-Dectin1 receptor to stimulate IgA production at peyer patches. So Yeast walls are yeast Wall there is no Mannan free product or b-glucan free products that lead to IgA production.
It is clear in your trials that the use of yeast wall help the bird to cope with heat stress by the effect of this high IgA concentrations in the intestine (as you mention in your trial and some other done). Gut integrity it is the main target to achieve in heat stress.

Martin Smith
Evonik Animal Nutrition
6 de junio de 2018

Heat stress continues to be a challenge, and any contribution to knowledge is welcomed. However, I would correct some of the points raised recently. Use of methionine sources will inevitably reduce heat stress, as correct formulation to SID amino acids will reduce crude protein content and thus energy expended in excreting excess nitrogen.
The choice of methionine source needs to account for this. As HMTBa, in reality, has an average BE of only 65% compared to DL Methionine, M+C deficiency is a possibility if higher BE values are used. Furthermore, the assertion that HMTBa is “more effective than DLM in preventing the characteristic depression in bird’s performance during heat stress” is not correct. Neither is the assertion that “HMTBa is absorbed by diffusion”. One should consider Maenz and Engele-Schaan (J. Nutr. 126, 1438-1444 1996) and Mitchell and Lemme (International Journal of Poultry Science 7 (3): 223-233 2008) as but two examples of the large body of work confirming that all methionine sources are transported by active-transport processes; and that response of birds to heat stress is not affected by methionine source.
Effective formulation, using accurate and precise digestible nutrient values, is undoubtedly a useful tool in reducing the effects of heat stress. Use of lipids as energy sources rather than carbohydrates; and use of salts such as potassium carbonate are more likely to provide relief.

Peter Ssenkungu
6 de junio de 2018

All this aside as a farmer and with some nutritional knowledge in tropical areas in Uganda... I have observed better results in tropical conditions for Layer, especially with HMTba usage.

The claim and not sure but the observation is better tropical performance in Layers on HMTba

Forest Lin
ADM Aditivos
6 de junio de 2018

Heat stress is really a headache for farms, the integrated solutions can work well only, so the capsicum can contribute some works along with other solutions according to Pancosma's numerous research for many years, you will see the result if you can try with extract.

Dr. Raúl Cortés Coronado
6 de junio de 2018
Heat stress make a lot of change in the animal. One that it is more important for live and performance is that the antioxidant "bag" is reduced because lack of this product in diet. To cope with this, the bird increase (?) the production of antioxidant enzymes as glutation peroxidase, but this need not only Se but Glutation. Cysteine needed for this glutation comes from metil-cicle that is push by met, but more by betaine. Betine is the only know product that may help to increase glutation production. How HMTb join this metil-cicle it may be the possible role in heat stress. Met do not increase glutation production.
Bernardo Plantilla
7 de junio de 2018
Impressive!
Begerano Albert
Agrited
7 de junio de 2018

Farmers should study the direct effect of betaine, in reducing stress under heat stress condition, there are few types of betaine, it seems that the natural source is more efficient.

Ruth Raspoet
Phileo by Lesaffre
7 de junio de 2018

It must be kept in mind that YCW solutions like Safmannan, will have a much broader and more efficacious effect. Safmannan is able to bind pathogenic bacteria and will thus control the growth of opportunistic bacteria. Additionally, it will assist in the preservation of the tight junction integrity and in that way control bacterial translocation and gut inflammation. The control of gut inflammation is key in the mode of action to control the effects of heat stress.

Slausgalvis Virginijus
7 de junio de 2018

Thank you Fiodor. Colleagues.

phd.nawfal
9 de junio de 2018

Thank you for this information.

Mushtaq ahmad
Mushtaq ahmad
12 de junio de 2018
As there will be any effect of dubbing in hen heat regulation? B/c comb may have a role in heat dissipation .isn,t? Suggestion please? Plus Feeding very earlier at morning can effect or not? Although if you have an environmentally control house? I mean cost of temperature lowering.
Mushtaq ahmad
Mushtaq ahmad
12 de junio de 2018
Yogurt will do the job. As will as if we lower the gut PH we can also cope that.
Ricardo Barretto Toledo
ICC
13 de junio de 2018

When we talk about Yeast Cell Wall (YCW) and its benefits to mitigate heat stress, It's important to consider a YCW source that originates most as possible indigestible fibers (MOS and B-Glucans), as what we look for it's a YCW that is able to reach the intestine without being digested on the way through. Otherwise, we will have those sugars digested in the rumen and no effect as expected. We can find in the market such indigestible options and the product ImmunoWall its one of that most indigestible YCW available (with min. 30% B-Glucans and 17% MOS). We have some data to share in case of interest. Best regards.

Najy Bennasr
18 de junio de 2018

Ricardo Barretto Toledo
Dear Ricardo can you share the data for monogastrics?

Dr Kibiike David
5 de enero de 2021

Thanks, this is a great paper and that is the reality on the ground. In Uganda is very hard to keep birds in layer for a long time because of extremes temperatures.

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