Research shows high-protein diets offer strong anti-cholera protection

Описание: Milk and cheese could be powerful weapons against cholera—one of the world's deadliest bacterial infections. A new study from UC Riverside reveals that high-protein diets, particularly those rich in casein (milk protein) and wheat gluten, can reduce cholera bacteria in the gut by up to 100 times compared to balanced diets. Published in Cell Host & Microbe, the research uncovers how everyday foods might dramatically alter infection outcomes without antibiotics or drugs.
Cholera kills through severe diarrhea caused by Vibrio cholerae bacteria, which uses a needle-like weapon called the type 6 secretion system (T6SS) to inject toxins into gut cells and neighboring bacteria. In regions with poor sanitation, rapid rehydration saves lives, but antibiotics risk creating resistance. Researchers wondered whether diet could influence this deadly battle in the gut microbiome.
Ansel Hsiao's team tested three dietary extremes on infected mice: high-fat, high-simple-carbohydrate, and high-protein diets. They measured cholera colonization levels and tracked bacterial behavior in the gut. High-fat diets showed minimal protection, while carbohydrates offered limited defense. But the high-protein groups—especially casein and wheat gluten—nearly eliminated cholera growth.
Digging deeper, researchers discovered these proteins specifically suppress T6SS, cholera's microscopic syringe. Without this weapon, the bacteria struggle to kill competitors or establish gut dominance.
The mechanism appears tied to amino acids from protein breakdown disrupting bacterial protein machinery. Casein and gluten stood out because their specific amino acid profiles most effectively mute T6SS. This dietary protection lasted throughout infection without side effects.
In cholera-endemic areas of Asia and Africa where clean water remains scarce, this discovery offers hope. High-protein foods are inexpensive, widely available, and carry no resistance risk—unlike antibiotics. Regulatory agencies already recognize casein and gluten as safe, making rapid deployment feasible.
Dietary defense won't breed superbugs. Some proteins clearly outperform others, but improving nutrition universally protects against many infections. This research transforms cholera from solely a sanitation problem into one where strategic eating could save lives.



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