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how does residental normal flora protect the body against pathogens
The pores on your skin help to prevent harmful pathogens from entering. Pathogens cause disease, infection and Cancer. By keeping these pathogens out, this is how pores protect you.
gjyrjry
Yes. Tuberculosis does not give you immunity against the strep throat.
They don't defend pathogens. They defend *against*pathogens. They poison them, they burn them with ozone / hydrogen peroxide / sodium hypochlorite / chorine dioxide, and then they eat them whole if necessary.
Immune system,
The tonsils are lymphoid organs that are part of the Mucosa Associated Lymphoid Tissues or MALT. They remove pathogens entering the pharynx or throat.
Yes, bacterial infections by mesophilic pathogens can cause the symptom of a sore throat. For example, one infamous bacteria for this is Streptococcus pyogenes which causes strep throat.