Pharyngeal swab collection principle

Because both breath and food pass through the mouth, bacteria of all kinds live in the mouth. Such as catarrhal bacteria, various Staphylococcus, various Streptococcus, Diphtheria-like bacteria, Klebsiella pneumoniae and Escherichia coli. In addition, there are anaerobic bacteria, such as Peptococcus, Bacteroidetes and yeast-like bacteria.

Influenza is spread through the respiratory tract, and the pharynx is where the virus gathers. Throat swab specimens are medical cotton swabs, which are dipped in a small amount of secretions from the pharynx of the human body, and the samples taken are throat swab specimens.