00:01
But this question here says, which characteristics of pertussis is incorrect? it says there are three stages of disease, ciliated cells in the trachea are rendered non -functional, one stage of disease produces violent coughing fits.
00:17
Option d says a bacteria is the cause of the disease, and option e says it can be prevented by vaccination.
00:23
So in this case, option a is correct, because you have the catagural stage, you have also the paroxysmal stage, so in this stage, practically there are severe and uncontrollable coughing fits during the paroxysmal stage, okay? and then you have the convalescent stage.
00:50
So option a is true, option b says ciliated cells in the trachea are rendered non -functional, so this may be partially true, because practically this bacteria attacks the cilia in the trachea, but they impair their function, but they still have some function, okay? so they are not going to be rendered non -functional completely...
