question: given that all the bacteria has already gone through your digestive system, why would eating your own poo make you unwell?
comment: Feces is the waste from your body for one. It has much less, and often no, nutritional value. That alone makes it something that can make you ill. Feces that isn't your own can be infected with diseases like hepatitis, which can cause you to get the disease. Feces that isn't ingested quickly can also grow new bacteria that can make you ill.
passages: A reduction in levels of native bacterial species also disrupts their ability to inhibit the growth of harmful species such as "C. difficile" and "Salmonella kedougou", and these species can get out of hand, though their overgrowth may be incidental and not be the true cause of diarrhea. Emerging treatment protocols for C. difficile infections involve fecal microbiota transplantation of donor feces. (see Fecal transplant). Initial reports of treatment describe success rates of 90%, with few side effects. Efficacy is speculated to result from restoring bacterial balances of bacteroides and firmicutes classes of bacteria.
   Enterotoxemia
  
  Enterotoxemia is a condition induced by the absorption of large volumes of toxins produced by bacteria such as "Clostridum perfringens" from the intestines. There are several strains of "C. perfringens" (type B, C, and D) that may lead to the development of this gastrointestinal condition.
  
  Section::::Lamb dysentery.
   People with cryptosporidiosis should not swim in communal areas because the pathogen can reside in the anal and genital areas and be washed off. They should wait until at least two weeks after diarrhea stops before entering public water sources, since oocysts can still be shed for a while. Also, they should stay away from immunosuppressed people. Immunocompromised people should take care to protect themselves from water in lakes and streams. They should also stay away from animal stools and wash their hands after touching animals. To be safe, they should boil or filter their water. They should also wash and cook their vegetables.
   The development of EE is multifactorial, but predominantly associated with chronic exposure to contaminated food and water. This is especially true in environments where widespread open defecation and lack of sanitation are common.
  
  Section::::Mechanism.
  
  Long-term exposure to environmental pathogens leads to a generalized state of intestinal inflammation. Chronic inflammation leads to both functional and structural changes which alter gut permeability and ability of the intestine to absorb nutrients.
   It is of utmost necessity for countries with inadequate sewage disposal system to disinfect faeces and article soiled with faeces before disposal; Food chain, starting from agricultural products on the farms to manufacturing and preparation of foods both for family and sales purpose should have control measures (WHO, 2018).
  
  Section::::History.:Pathogenicity and transmission.:Survival of Campylobacter coli.
   obvious methods are to improve access to sanitation, e.g. toilets, but also
  
  convincing people to maintaining them in a clean, functional state, thereby making
  
  them conducive to use.
  
  Section::::Treatment.
  
  The drug of choice for the treatment of hookworm disease is mebendazole which
  
  is effective against both species, and in addition, will remove the intestinal
  
  worm Ascaris also, if present. The drug is very efficient, requiring only a
  
  single dose and is inexpensive. However, treatment requires
  
  more than giving the anthelmintic, the patient should also receive dietary
  
  supplements to improve their general level of health, in particular iron
   Enterohemorrhagic "E. coli" (EHEC) and enteropathogenic "E. coli" (EPEC) are pathogens that rely on OmpT to colonize in the intestine of their host. In response to the presence of "E. coli" in the gut, the host releases antimicrobial peptides as part of the innate immune response. Since OmpT can break down these antimicrobials and inactivate them, EHEC and EPEC can colonize within the colon or small intestine of the host and lead to serious diarrheal diseases.
   In humans, fecal transplants (or stool transplant) is the process of transplantation of fecal bacteria from a healthy individual into a recipient who is suffering from a certain disease, such as irritable bowel syndrome. The resulting inoculation of healthy gut flora can sometimes improve the physiology of the recipient gut.
   "Clostridium difficile", also known more commonly as "C. diff", accounts for 10 to 20% of antibiotic-associated diarrhea cases, because the antibiotics administered for the treatment of certain disease processes such as inflammatory colitis also inadvertently kill a large portion of the gut flora, the normal flora that is usually present within the bowel. With this lower level of "healthy" bacteria present, the overgrowth of "C. diff" is then responsible "for elaborating the enterotoxin".
  
  Section::::Treatment.
   Elephants, hippos, koalas, and pandas are born with sterile intestines, and to digest vegetation need bacteria which they obtain by eating their mothers' feces, a practice termed coprophagia. Other animals eat dung.
  
  In veterinary medicine fecal microbiota transplant has been known as "transfaunation" and is used to treat ruminating animals, like cows and sheep, by feeding rumen contents of a healthy animal to another individual of the same species in order to colonize its gastrointestinal tract with normal bacteria.
  
  Section::::Terminology.
   The concept of treating fecal diseases with fecal matter originated in China millennia ago. Fourth-century Chinese medical literature mentions it to treat food poisoning and severe diarrhea. 1200 years later Li Shizhen used "yellow soup" (aka "golden syrup") which contained fresh, dry or fermented stool to treat abdominal diseases. "Yellow soup" was made of fecal matter and water, which was drunk by the person.
   "S. aureus" is particularly common, and asymptomatically colonizes about 30% of the human population; attempts to decolonize carriers have met with limited success and generally involve mupirocin nasally and chlorhexidine washing, potentially along with vancomycin and cotrimoxazole to address intestinal and urinary tract infections.
  
  Section::::In built environment and human interaction.:Antimicrobials.
   If "E. coli" bacteria escape the intestinal tract through a perforation (for example from an ulcer, a ruptured appendix, or due to a surgical error) and enter the abdomen, they usually cause peritonitis that can be fatal without prompt treatment. However, "E. coli" are extremely sensitive to such antibiotics as streptomycin or gentamicin. Recent research suggests treatment of enteropathogenic "E. coli" with antibiotics may not improve the outcome of the disease, as it may significantly increase the chance of developing haemolytic-uremic syndrome.
   The manipulation of the gut flora is complex and may cause bacteria-host interactions. Although probiotics, in general, are considered safe, there are concerns about their use in certain cases. Some people, such as those with compromised immune systems, short bowel syndrome, central venous catheters, heart valve disease and premature infants, may be at higher risk for adverse events. Rarely, consumption of probiotics may cause bacteremia, and sepsis, potentially fatal infections in children with lowered immune systems or who are already critically ill.
  
  Section::::External links.
   Manure on occasion gets mixed with meat, possibly contaminating it with salmonella and pathogenic "E. coli". Usually spread through undercooked hamburgers, raw vegetables, and contaminated water, it is difficult to treat. Although supportive treatment can substantially aid inflicted individuals, since endotoxin is released from gram-negative bacteria such as "E. coli" upon death, antibiotic use to treat "E. coli" infections is not recommended. About 4% of people infected with "E. coli" 0157:H7 develop hemolytic uremic syndrome, and about 5% of children who develop the syndrome die. The rate of developing HUS is 3 in 100,000 or 0.003%. "E. coli" 0157:H7 has become the leading cause of renal failure among American children. These numbers include rates from all sources of poisoning, including lettuce; radish sprouts; alfalfa sprouts; unpasteurized apple juice/cider; cold cooked or undercooked meat; and unpasteurized animal milk. Additional environmental sources include fecal-contaminated lakes, nonchlorinated municipal water supply, petting farm animals and unhygienic person-to-person contact. An average of sources leads to the number of 0.00000214% for undercooked beef.
   Cryptosporidium hominis, along with "Cryptosporidium parvum", is among the medically important "Cryptosporidium" species. It is an obligate parasite of humans that can colonize the gastrointestinal tract resulting in the gastroenteritis and diarrhea characteristic of cryptosporidiosis. Unlike "C. parvum", which has a rather broad host range, "C. hominis" is almost exclusively a parasite of humans. As a result, "C. hominis" has a low zoonotic potential compared to "C. parvum". It is spread through the fecal-oral route usually by drinking water contaminated with oocyst laden feces. There are many exposure risks that people can encounter in affected areas of the world. Cryptosporidium infections are large contributors of child death and illness in heavily effected areas, yet low importance has been placed on both identifying the species and finding more treatment options outside of nitazoxanide for children and AIDS patients.
   Good sanitary practice, as well as responsible sewage disposal or treatment, are necessary for the prevention of "E. histolytica" infection on an endemic level. "E.histolytica" cysts are usually resistant to chlorination, therefore sedimentation and filtration of water supplies are necessary to reduce the incidence of infection.
   "E. coli" and other facultative anaerobes constitute about 0.1% of gut microbiota, and fecal–oral transmission is the major route through which pathogenic strains of the bacterium cause disease. Cells are able to survive outside the body for a limited amount of time, which makes them potential indicator organisms to test environmental samples for fecal contamination. A growing body of research, though, has examined environmentally persistent "E. coli" which can survive for extended periods outside a host.
   "Y. enterocolitica" is widespread in nature, occurring in reservoirs ranging from the intestinal tracts of numerous mammals, avian species, cold-blooded species, and even from terrestrial and aquatic niches. Most environmental isolates are avirulent; however, isolates recovered from porcine sources contain human pathogenic serogroups. In addition, dogs, sheep, wild rodents, and environmental water may also be a reservoir of pathogenic "Y. enterocolitica "strains. Human pathogenic
  
  strains are usually confined to the intestinal tract and lead to enteritis/diarrhea.
  
  Section::::Signs and symptoms.
   Hikers who develop three or more loose stools in a 24-hour period – especially if associated with nausea, vomiting, abdominal cramps, fever, or blood in stools – should be treated by a doctor and may benefit from antibiotics, usually given for 3–5 days. Alternatively, a single dose azithromycin or levofloxacin may be prescribed. If diarrhea persists despite therapy, travelers should be evaluated and treated for possible parasitic infection.
  
  "Cryptosporidium" can be quite dangerous to patients with compromised immune systems. Alinia (nitazoxanide) is approved by the FDA for treatment of "Cryptosporidium".
  
  Section::::Epidemiology.
   Metronidazole should not be used as a single agent for the eradication of bowel infection.33 When used alone, a few cases are known to have developed amoebic liver abscess, months after apparently successful cure of dysentery. Cases refractory to metronidazole have been occasionally described.
  
  Section::::Management.:Amoebicidal drugs.:Tinidazole.
   Section::::Role in disease.:Obesity.
  
  Studies with germ-free mice have suggested that the absence of gut microbes protects against obesity. While the exact mechanism by which microbes play a role in obesity has yet to be elucidated, it has been hypothesized that the intestinal microbiota is involved in converting food to usable energy and fat storage.
   If another person then eats or drinks food or water that has been contaminated with feces containing the cyst, that person will also become infected with the amoebae. Amoebic dysentery is particularly common in parts of the world where human feces are used as fertilizer.
   Other problems that "E. coli" causes are usually result from having too many in the large intestine. For example, large populations of "E. coli" may lead to "dyspepsia, hyperacidity, gastritis, and indigestion"; these are common problems of most intestinal parasites.
  
  Section::::Treatment.
   Traditionally, nothing by mouth was considered to be mandatory in all cases, but gentle feeding by enteral feeding tube may help to restore motility by triggering the gut's normal feedback signals, so this is the recommended management initially. When the patient has severe, persistent signs that motility is completely disrupted, nasogastric suction and parenteral nutrition may be required until passage is restored. In such cases, continuing aggressive enteral feeding causes a risk of perforating the gut.
  
presuppositions: Because feces has come from the body, there shouldn't be anything within it to cause you to be sick.
corrections: Feces is the waste of one's body, there is no nutritional value, feces of other human beings can carry disease, lastly feces also grows new bacteria which can cause illness. 
raw_presuppositions: Because feces has come from the body, there shouldn't be anything within it to cause you to be sick. Feces only has bacteria that's gone through the digestive system.
raw_corrections: Feces is the waste of one's body, there is no nutritional value, feces of other human beings can carry disease, lastly feces also grows new bacteria which can cause illness.  Feces can have new bacteria that grows on it.