What causes decreased platelet count?
Patient: my 9 month old baby was admitted in the hospital and diagnosed had a UTI and Raseola infantum after we got out of the hospital her platelets decreased at 150 then after 12 hours it decreased to 142. Is this dangerous or what might have caused it to decreased? Doctor: Hello and welcome to ‘Ask A Doctor’ service.  I have reviewed your query and here is my advice. Any viral illness can cause decreased platelet count and Roseola is a viral illness. So do not worry about platelet count. It is not dangerously low and I suggest you to follow up with a physician for clinical bleeding tendency and do not repeat platelet count unnecessarily.Hope I have answered your query. Let me know if I can assist you further.Regards,Dr. Sumanth