text: Yo, check it out, I got a study to share,
  About Saccharomyces boulardii, let me make it clear.
  They checked its effect on the immune system, no joke,
  Using germ-free Swiss/NIH mice, here's the scope.
  
  They compared probiotic-monoassociated with germ-free,
  See how Saccharomyces boulardii affected their immunity.
  In the gut of germ-free mice, it colonized like a champ,
  Survived the gastrointestinal conditions, no damp.
  
  They peeped the intestinal contents, what did they find?
  An increase in sIgA production, one of a kind.
  Both total and anti-S. boulardii, it was legit,
  In monoassociated mice, the levels were lit.
  
  Kupffer cells, oh boy, they were in the mix,
  In monoassociated mice, they increased the tricks.
  Compared to germ-free controls, it was clear,
  The number of Kupffer cells was higher, no fear.
  
  Escherichia coli B41, let's talk about its fate,
  In S. boulardii-monoassociated mice, it couldn't wait.
  Clearance was higher than in germ-free mice,
  S. boulardii showed its strength, now take my advice.
  
  TNF-alpha, IFN-gamma, and IL-12, they checked the serum,
  In monoassociated mice, the levels were a bit extreme.
  Higher at earlier time points, they had the power,
  Compared to germ-free mice, it was their finest hour.
  
  These results show the yeast's impact, no lie,
  S. boulardii modulates the host immune reply.
  Improving resistance to enteropathogenic infections,
  That's the goal, enhancing the body's defenses.