Are bacteria found in humans

Answer 1

Bacteriophges do not infect humans. They only infect the bacteria they are specific to. Once they have destroyed all of the bacteria they have infected, your immune system efficiently removes the bacteriophages from your system. Bacteriophages are self-limiting and harmless to humans. Peggy Steele

Answer 2

Yes, your skin is covered with bacteria, your mouth is covered with bacteria, your intestines are lined with bacteria. More than half the mass of human feces is live bacteria that had been in the intestines. You would die without the bacteria living in your intestine as some of them digest things that you are unable to digest and make important vitamins, etc. that you need for proper nutrition. Some of the bacteria in the mouth and intestine prevent fungi and disease causing bacteria from growing (e.g. without the bacteria in your mouth you could easily get a serious fungal infection of the mouth called "thrush").

Answer 3

Yes. Number by number there are more bacteria in and on your body than the cells you have in your body. You will not survive with out the presence of bacteria in your large intestine. Some times these 'normal bacterial flora' is killed by the broad spectrum antibiotics. Then you get the serious type of super infection leading to a disease called as pseudomembranous enterocolitis. This can result in your death, if proper treatment is not given to you timely. Your feces contains large number of bacteria. Probably third of the fecal mass is derived by these bacteria. You have lot of bacteria in your mouth cavity as well as on your body also. Probably all of them serve some or other useful functions.