Lallemand Animal Nutrition
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What's new

Jun 15, 2017

Heat stress could be underestimated in swine

Jun 15, 2017

European state of play and new study on live yeast benefit

In the summer, lactating sows could spend 34 to 94% of their time above heat stress threshold (25°C), which could lead to 0.6 to 2.5 kg per day of reduced feed intake, and this is true from Netherlands to Spain.

These are the findings from an initial survey conducted by Lallemand Animal Nutrition in order to evaluate the reality of heat stress in the farrowing rooms across Europe. The consequences for the sow and the farmer range from discomfort to reduced body weight and reproduction issues.



Survey of heat stress risks in farrowing rooms in Europe. Average daily percentage of time spent above 25°C (significant heat stress) and estimation of the associated feed intake reduction (Lallemand Animal Nutrition internal data, 2016).

Recent trial (INRA Pegase, France, unpublished) confirms that the use of probiotic yeast S. cerevisiae boulardii I-1079 in feed, known to help control digestive process and performance under challenging conditions, could contribute to adaptation to heat stress. The study was performed by E. Labussière and his team at INRA Pegase, using state-of-the-art experimental facility to study energy balance and metabolism under controlled conditions. They used finishing pigs as a model for swine and sows, (the bigger the animal, the more sensitive to heat stress). Results indicate that LEVUCELL SB* had a positive effect on growth performance under both thermo-neutral and heat stress conditions. However, the supplementation had a greater impact under heat stress as it was able to “compensate” for the negative impact of high temperature on pig growth.


This could be linked to two effects of the supplement:

  1. Improved feeding behavior: The number of meals per day was significantly improved under heat stress and the total daily feed intake was not affected by ambient temperature with LEVUCELL SB*.
  2. Positive effect on energy metabolism: Less energy is consumed for heat production, therefore more energy was made available for pig growth.


Farm trials conducted with sows in maternity pen confirm similar benefits in sows in field conditions: improved sow feed intake, reduced body weight loss in lactation, translated into increased piglet pre-weaning average daily gain (ADG), and even reduction of piglet neonatal diarrhea.

Hence, LEVUCELL SB* could represent a valuable tool to help alleviate the heavy toll of heat stress on pig production, in complement to relevant heat abatement strategies in the barn.

To know more about LEVUCELL SB*, click here.


*Not all products are available in all markets nor all claims allowed in all regions.