IntroductionBacteria is becoming a common problem all over the world. This is also a great advantage. Bacteria are present in our food, in humans and everywhere else. Not all bacteria are bad. Bacteria are microorganisms. They can only be seen under a microscope. Taken together, bacteria are the second most common cause of meningitis. Bacterial meningitis tends to be more serious than viral meningitis and can even lead to death. However, unlike viruses, bacteria can be killed by medications like antibiotics. Meningitis is an infection of the meninges, which are the delicate membranes that cover and protect the brain and spinal cord. Tuberculosis was once a widespread disease. With the help of bacteria, the situation is getting worse in some countries around the world. Bacteria become resistant to antibiotics. Doctors are constantly changing their patients' medications as bacteria become resistant to antibiotics. Vaccines help prevent some, but not all, types of meningitis. Bacteria reproduce very easily and quickly, so a disease can spread very quickly.BacteriaBacteria are living things. They have no more than a single cell. They are even smaller than the cells of the human body. There are millions of them and they are multiplying quickly. Bacteria belong to a universe of single-celled creatures too small to be seen with the naked eye, but they exist everywhere on earth. Bacterial cells do not have a nucleus. This means they are prokaryotes. Eukaryotes have a nucleus inside their cells. Microbiology is the study of eukaryotes, prokaryotes and viruses. Some bacteria are good and others are bad. Certain bacteria can cause illness. This means that they are pathogenic bacteria. Bacterial cytoplasms...... middle of paper ......ria remain inactive in the body. If the immune system is weak, bacteria become active. When bacteria are in an active state, they can cause tissue death in the organs they infect. Tuberculosis can be very deadly if left untreated. The bacteria that causes tuberculosis are spread through the air. This means that tuberculosis is contagious. If the bacteria are inactive in the body, it is called latent tuberculosis infection. Inactive bacteria eventually become active. Most of the time, medications kill inactive bacteria before they become active. Tuberculosis was a very common disease. Thanks to antibiotics developed in the 1950s, tuberculosis took on new forms of multidrug-resistant tuberculosis and extensively drug-resistant tuberculosis. This has caused a major crisis in some countries around the world.