why vibrio cholerae don't kill by acidic pH of stomach?
464533
Well, nice question really.\n\nVibrio cholera is very sensitive to stomach acid and does get killed by stomach acid.\n\nThe question is how does it infect us then?\n\nWell, when u consume VERY LARGE quantity of this organism , vibrio cholera, ONLY THEN, u fall sick.\n\nThis large quantity is approximately one billion organisms.\n\nYou can easily understand that such a huge number of organisms would naturally over-ride the stomach acid barrier. (coz stomach has little acid).\n\nNote: whenever, your stomach acid content decreases, (such as while taking anti-acid therapy,) organisms less in number than estimated 1 billiuon can also cause disease.\n\nThis answers your question.
1085742
When the stomach secretes the Hydrochloric Acid, it has a pH of 0.8 (yes, it can go below 1). The acid is then diluted in the stomach so that the pH settles at between 2 and 3.\n\nFreshly secreted mouth saliva has a slightly acidic pH of 6.4 to 6.9, however that is altered by different foods and drink. e.g. Coke would increase its acidity.\n\nThe pH in the small intestine varies.\nIn the duodenum it is 6 to 6.5\nBeyond the duodenum lies the jejunum and ileum which have a pH of 7.5\n\nThe optimum temperature for mammalian enzymes is 40 degrees C.\n\nI hope this helps. Good luck with your homework.
657811
coz alcohol kills the problem causing bacteria in ur tummy.
596938
temperature doesn't affect pH (doesn't change acidity)
386465
Its a misnomer. Many different things can lead to peptic acidosis. Upset from stress, bad diet (usualy the culprit) Its kind of like a cold-it wil go away in most cases and is VERY treatable. Commonly a low ph, again, from a poor diet can cause it. In rare cases a malfunctioning cardiac valve (not the heart but the location) cause whats called "reflux disease" or heartburn. \n   As for the bacterial cause-Ive never seen a bacterial infection that couldnt be wiped out with oregano oil!\n\n   As for "esophageal ulceritis" or esophageal lesions from reflux, the cure is simple: aloe vera gel. Works like a charm, and it even heals the lesions.\n\n   Its basically a label not a diagnosis-yes! They made it up!!! When a symptom aquires the "disease" label it becomes something treatable with expensive therapy or drugs--couldnt we all use more drugs in the world?  :D
422182
I was told that because I had to have lots of penicillin when I was a child (sick all the time), that my "good" bacteria in my intestines was destroyed.  I need to take acidophiles daily to keep my diarhia and cramps at bay..It really works!
639528
no, H.pylori is an anaerobic bacteria, could not live in the presence of oxygen.\n\n\n\nIn patients who are asymptomatic, treatment is not usually recommended.\n\nIn gastric ulcer patients where H. pylori is detected, normal procedure is eradication to allow the ulcer to heal. The standard first-line therapy is a one week triple-therapy of amoxicillin, clarithromycin and omeprazole – though sometimes a different proton pump inhibitor is substituted, or metronidazole is used in place of amoxicillin in those allergic to penicillin. Such a therapy has revolutionised the treatment of gastric ulcers and has made a cure to the disease possible, where previously symptom-control using antacids, H2-antagonists or proton pump inhibitors alone was the only option.\n\nUnfortunately, an increasing number of infected individuals are found to harbour bacteria resistant to first-line antibiotics. This results in initial treatment failure and requires additional rounds of antibiotic therapy. For resistant cases, a quadruple therapy may be used. Bismuth compounds are also effective in combination with the above drugs. For the treatment of clarithromycin- resistant strains of H. pylori the use of levofloxacin as part of the therapy has been recommended.\n\nThere is some preliminary evidence that regular consumption of broccoli might eradicate H. pylori.\n\nAs explained below, some authors suggest that an H. pylori infection may be protective against certain diseases of the esophagus and cardia. Therefore, a more cautious approach than complete eradication may be necessary in some cases.
921921
Acidophilus is a great, natural probiotic.  The way that it actually works is that certain substances which sour, such as active cultured yogurt, buttermilk and certain cheeses, contain Lactobacillus acidophilus that enhance digestion and elimination by effectively digesting proteins in the bowel.  Acidophilus also helps to detoxify harmful bacteria by helping to restore friendly bacteria that keep certain microorganisms in check.  That's the "how" in the best terms that I can use to describe it.  Please visit the website below to read more on the answer to whether the bacteria pass the stomach acids.  The answer is yes they do. The website reads, "Surviving the Stomach -\nAdding to the false-label-claim hazard is the fact that stomach acid destroys many probiotics before they reach the intestines, which is why some probiotic products must be taken in the morning when stomach acid levels are lowest. In response, some companies are developing new pill-coating methods to keep probiotics intact and alive as they pass through stomach acids."  Hope this information answers your questions!  They were good questions! :-)
224096
Gastric juice is the most acidic and therefore has the lowest pH.  Saliva has a pH of around 7, which is the pH of water; pancreatic juice is basic and has a pH of about 8-9; intestinal juice is pretty similar in acidity/basicity as pancreatic juice; and I don't know about bile, but I'm sure that it's not as acidic as gastric juice, which has a pH of around 1-2.  Your answer is B.
1043587
The gastric juice is secreted by the peptic cells, parietel cells, the mucous secreting cells of the stomach. The pH of gastric juice is highly acidic ranging from 1.5 to say 6 in healthy persons, usually. It is strongly acidic as it contains hydrochloric acid.\n\nAfter taking a meal the gastric juice secretion increases.. This will stay for a few hours and then disappears. About 99.5% of gastric juice is water and the rest is made of oraganic and inorganic solids.
765001
you guys must be kidding. saliva is not acidic. it has the same pH as blood which is around 7.4.\n\namylase, the main enzyme in saliva has a pH optima of 7.4. coincidence? no. this enzyme is used to catalyse carbohydrates in the mouth since enzymes in the stomach are mostly protein-digesting enzymes.\n\nalkalinty of saliva is a measure to somewhat neutralise the high acidity of stomach contents. you would notice if you remember the last time you vomitted. before you puke, a natural reflex to salivate occurs to protect your mouth from the stomach acids. saliva also helps to control pH on your stomach everytime you swallow.
520646
The Stomach's acid is used to destroy the bacteria found in food, the enzymes found in the stomach are used to break down Carbohydrates further, and the folds are used to mix everything easier.\n\nWithout the stomach acid, bacteria would be higher in the body creating more WBC but overworking the lymph nodes and causing a constant fever, but the waste from the large intestine would still be able to release some.  The enzymes in the stomach are similiar to the ones found from the salivary glands and the pancreas.  This means, the pancreas would be on overdrive creating more enzymes for the carbohydrates.  And the mechanical digestion is aided by chewing and the moving from the small intestine, all that would be needed is more chewing.
1081164
Stomach Acid contains HCl.\n\nHCl is also commonly known as Muriatic Acid and many toilet bowl or metal cleaners contain it as well.  \n\nMuriatic Acid is made in pills to balance the pH and sanitize water in swimming pools.\n\nThe local anesthetic used by dentists to decrease pain and discomfort also contains little HCl.
242714
Maybe the HCl concentration is too high?  Pepsin is active at pH 2.5.  Also how do you know the 'fish sample' is actually being broken down by pepsin?
3057
There is not really any normal flora of the stomach, though a little over half the world's population has H pylori in the stomach.  This does not mean that they all have ulcers, though.  The immune system will attempt to defeat the infection, but it is usually unable to reach the H pylori due to its odd location.  It is possible that some of what causes an ulcer is not the bacteria itself but the body's inflammatory response.
59412
Proteins function between very narrow pH levels, and, depending on the protein, those levels vary. \nFor instance, the peptidase proteins in your stomach can only function in a pH level of around 2-2.5. That's why your stomach is so acidic.\nBut, on the other hand, the proteins that digest starch in your mouth function in rather neutral-basic pHs (say 5-7).\nIt depends on the molecular structure of the proteing.
741720
Urease is an enzyme. Thus it is very sensitive to pH changes. pH3 is probably too extreme a pH from the optimal pH range for urease thus the urease has denatured, therefore there is no breakdown. The first answer is totally inaccurate