Helicobacter pylori survival time

Helicobacter pylori is a relatively common bacterium. When the human body is infected with Helicobacter pylori, it is easy to develop symptoms of gastritis. Therefore, in daily life, we must pay attention to our eating habits. Good hygiene habits can keep us away from many diseases. Eat more fresh fruits and vegetables, and it is best not to eat spicy foods, otherwise it will easily lead to stomach problems.

1. Features

Helicobacter pylori is a Gram-negative bacterium that is mainly distributed in the gastric mucosal tissue. 67%-80% of gastric ulcers and 95% of duodenal ulcers are caused by Helicobacter pylori. Common symptoms of patients with chronic gastritis and peptic ulcers are: fullness, discomfort or pain in the upper abdomen after eating, often accompanied by other adverse symptoms such as belching, bloating, acid reflux and loss of appetite. Some patients may also experience recurrent severe abdominal pain, small amounts of upper gastrointestinal bleeding, etc.

Clinical course: A total of 295 patients with chronic pharyngitis and 30 normal controls were uniformly smeared with throat swabs and observed under an ultra-high-power microscope with a magnification of 20,000 times. Dark field and phase contrast fields were selected for in vivo observation according to observation needs, and the results were judged by a professional. The chi-square test was used to evaluate the difference in HP positive rate between the two groups. Results Among the patients with chronic pharyngitis, Helicobacter pylori was detected in the pharyngeal secretions of 229 cases (77.63%, 229/295), and HP was not found in 66 cases (22.37%, 66/295). Among the normal control group, Helicobacter pylori was detected in the pharyngeal secretions of 2 cases (6.67%, 2/30), and the remaining 28 cases (93.33%, 28/30) were negative for Helicobacter pylori, chi-square test χ2=6.670, P<0.05. Conclusion Helicobacter pylori may be a neglected pathogen in the pharynx of patients with chronic pharyngitis. Ultra-high power microscopy may become a new method for screening Helicobacter pylori in pharyngeal secretions.

It is generally believed that the clinical course of Helicobacter pylori infection is as follows: Helicobacter pylori reaches the gastric mucosa through the mouth and settles and infects it, causing chronic, superficial gastritis after weeks or months, and then develops into duodenal ulcer, gastric ulcer, lymphoproliferative gastric lymphoma, chronic atrophic gastritis, etc. after several years or decades, and the latter is the most dangerous factor leading to gastric cancer. Experts believe that Helicobacter pylori infection increases the risk of gastric cancer by 2.7-12 times. If there is no Helicobacter pylori infection, at least 35%-89% of gastric cancer will not occur.

It is a consensus among scholars from various countries that Helicobacter pylori disease is acquired and transmitted. The mode of transmission is still not very clear, but the most likely route is oral-oral and fecal-oral transmission, which has been proven by the following experiments: 1. Use PCR to detect Helicobacter pylori DNA from patients' saliva, dental plaque and feces; 2. Isolate Helicobacter pylori from dental plaque and feces; 3. The same strain of H. pylori was isolated from the feces of multiple members of the same family.

2. Infection Distribution

Helicobacter pylori infects people of different races and regions around the world, and it can be said to be the most widespread chronic bacterial infection among adults. The general trend is that the infection rate of Helicobacter pylori increases with age, about 80% in developing countries and about 40% in developed countries, and is slightly higher in men than in women. The infection age in China is about 20 years earlier than that in developed countries. The infection rate for people aged 20-40 is 45.4%-63.6%, and it is as high as 78.9% for those aged 70 and above. In addition, the infection rate in northern my country is higher than that in southern China.

Like other gastrointestinal infectious diseases, the key to preventing Helicobacter pylori infection is to control the disease from entering the body through the mouth. For example, you should wash your hands before and after meals, pay attention to hygiene in eating, especially when eating raw and cold foods. It is a wise choice to adopt the separate dining system when dining in groups. Try to avoid using public bowls and chopsticks, and frequently use a disinfection cabinet like 80K-1U that can kill Helicobacter pylori on tableware at high temperature to disinfect the bowls and chopsticks. In addition, young and old should pay attention to hygiene and safety, not feed children orally at will, and check whether tableware between the north and the south is disinfected. If there is someone with Helicobacter pylori in the family, separate meals should be adopted temporarily until the patient is completely cured.