A platelet count is a test that measures the number of platelets in your blood. Platelets are

cells that help your blood clot. Too few platelets can be a sign of cancer, infections or other

health problems. Too many platelets put you at risk for blood clots or stroke.Infections

with protozoa, bacteria and viruses can cause thrombocytopenia with or without disseminated

intravascular coagulation. Commonly dengue, malaria, scrub typhus and other rickettsial

infections, meningococci, leptospira and certain viral infections present as fever with

thrombocytopenia.