They are from resident flora
Microorganisms that colonize the host for hours to weeks but do not establish themselves permanently are called transient flora
Normal flora cannot cause a "disease". But if normal flora is disrupted it can become a pathogen and then cause infection. Some diseases, like diabetes, can disrupt normal flora and cause infection, especially yeast infections on the skin or in the vagina of women.
pathogenic flora
YES, ANTIBIOTICS CAN CAUSE DIARRHOEA. ANTIBIOTICS IN ADDITION TO DESTROYING THE BAD INFECTION ALSO DESTROYS THE GOOD FLORA IN THE INTESTINES.
Normal body flora is generally helpful to the organism. In fact having normal body flora occupies space and resources that could otherwise be utilized by pathogens. However, some normal body flora can be harmful if the microbe enters an area of the body that it would not normally be found and can cause infection. These bacteria are known as opportunistic pathogens.
A mixed non-uropathogenic gram positive flora is a possible result for a urinalysis. This means the urine sample did not have any bacteria that could cause an infection.
how does residental normal flora protect the body against pathogens
Streptococcus, Staphylococcus, Bacteroides, and Haemophilus
also called microflora, indigenous flora, normal flora, microbiota, the variety of nonpathogenic microorganisms that normally permanently colonize various parts of the body
Also called microflora indigenous flora, normal flora microbiota, the variety of nonpathogenic microorganism that normally permanently colonize various parts of the body.
A doctor will determine bacterial infections. There are normal flora in the body and a shift in this flora could suggest infection.