Tongue, epiglottis and sublingual/parotid or submaxillary glands (Salivary glands). Hope this is what you were looking for :)
Answer:

point mutation, change within a gene in which one base pair in the DNA sequence is altered. Point mutations are frequently the result of mistakes made during DNA replication, although modification of DNA, such as through exposure to X-rays or to ultraviolet radiation, also can induce point mutations
Overuse of antibiotics is causing this resistance, we can let our bodies fight off bacterial infections naturally, stop the overuse of antibacterial soaps and cleansers, let our bodies build up resistance to these bacterias naturally through natural exposure.
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