What practical problem led alexander fleming to carry out his experiments with bacteria?

What led Alexander Flemming into carrying his experiment because there are infectious diseases in which bacteria are the cause and there is no treatment in curing these types of diseases, causing death and fatalities. It led Alexander continue working on his experiment in extinguishing the infectious agents caused by bacteria with the use of his discover with penicillin.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.