Final answer:
Antibiotic usage can disrupt microflora balance in the digestive tract, causing overgrowth of antibiotic-resistant bacteria like Clostridium difficile. Fecal transplants from healthy donors can restore normal gut microbial community to address the issue. Absence of key microbes in the intestines can contribute to health problems like obesity and autoimmune disorders.
Step-by-step explanation:
Ingesting high doses of antibiotics can disrupt the balance of microflora in the digestive tract. When normal gut bacteria are eliminated, antibiotic-resistant bacteria like Clostridium difficile can overgrow, leading to severe gastric issues, including chronic diarrhea. This problem cannot be treated with antibiotics and is instead addressed by fecal transplants from healthy donors to restore the normal microbial community in the intestines.
Furthermore, the absence of specific key microbes in the intestinal tract may contribute to various health issues, such as obesity, insulin resistance, and autoimmune disorders. Ongoing research is evaluating whether introducing certain microbes into the internal ecosystem can aid in treating these conditions.