Document Type : Al-Qadisiyah Conference 2025
Authors
Department of Microbiology, College of Veterinary Medicine, University of Al-Qadisiyah, Iraq
Abstract
Balantidium coli is a rare protozoan that infects humans. It is the only known ciliate parasite in people. The infection often comes from pigs or primates. It spreads through food or water that has been contaminated. Some people have no symptoms. Others may get diarrhea, dysentery, or long-term bowel problems. Studies show that B. coli can change the gut microbiome. Helpful bacteria like Bacteroidota and short-chain fatty acid producers may decrease. Harmful bacteria such as Campylobacterota and Brachyspira may increase. These shifts can harm the gut lining and trigger inflammation. The parasite eats bacteria, damages the gut wall, and changes nutrient levels. The immune system’s reaction can also promote harmful bacteria. These changes can remain after the infection clears, raising the chance of future illness. This imbalance can weaken the gut barrier. Bacteria may then pass into the blood. The balance of short-chain fatty acids may also change, affecting colon health and metabolism. Chronic cases may cause poor nutrient absorption. Checking the gut microbiome could help diagnose the infection. It could also guide treatment. Using antiparasitic drugs with probiotics or prebiotics may help restore balance. Understanding how B. coli affects gut bacteria could lead to better ways to prevent and treat the disease in people and animals.
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