I understand but pneumonia is already treated with anti bacterial meds and it seems that covid19 brings on pneumonia that causes sepsis to set in an organ failures so why not treat the pneumonia?
This is where it gets hard for the public to understand. I will do my best to explain.
Firstly the causes of pneumonia are diverse. Pneumonia just means inflammation of the lungs causing a reaction in the lung that causes the microscopic air sacks to fill up with inflammatory fluid.
Now the causes can be bacteria, viruses, mycoplasma, and insults such as inhaling smoke from a fire or things like chlorine gas exposure.
Now a common misconception is that vaccine for pneumonia will prevent you getting pneumonia. It won't. It will stop you getting pneumonia from a highly infectious gram positive coccus called strep pneumoniae. It won't protect you from any other cause.
Now the next thing I have to explain is the difference between sepsis and septicemia. Septicemia means you have organisms in your blood stream. Often this set off the cytokine storm of ARDS and multi system organ failure, but it may not. Other things can set off this reaction as I have explained before. The best way to prevent sepsis is prompt treatment and resolution of the underlying cause. The problem with the pneumonia caused by Covid 19 is that we have no reliable treatment for the underlying cause. So the cytokine storm has to run its course, as and after, your immune system takes care of the Covid 19 infection. So more likely than not it is how quickly your immune system knocks out the Covid 19 virus and probably a genetic propensity to cytokine storm that will determine whether you will get ARDS and stop there, or go on to multi system organ failure.
Now when you have someone in the ICU intubated and invasive vascular access in the great vessels. just about 100% of cases get secondary bacterial pneumonias and other infections which require antibiotic treatment, even though they were not the primary cause. However they sure light it up again, which makes ICU care so tedious, and why we tend to live with these patients for weeks. None of these cases are ever easy. There are no easy cases in this scenario.
Lastly the hdrochloroquine and Azithromycin in this context are not being used for their anti plasmodial and antibiotic properties respectively in this case of possible use against this virus.
That is the best I can do to explain a very complex subject and never thought we would have to delve this deeply into care in an ICU.
If you are more confused than ever after this, I'm sorry.