The hemoglobin. total and differential leucocyte count test are done as a part of a complete blood count. It is done in case of signs and symptoms of anemia, polycythemia, leukemia, or leukopenia. It is done at regular intervals to monitor the ongoing response to the treatment. The Malarial Parasite test helps to detect malaria antigens in the blood. The malarial parasite is detected when an individual is suffering from malaria. Anopheles mosquito if infected with malaria can transfer the malarial parasite to human blood by its bite. The hemoglobin, total leucocyte count, and differential leucoucyte count test is done: • As a part of routine health check-up • As a part of complete blood count • To evaluate the hemoglobin content in the blood • To monitor the overall health of an individual such as weakness, fatigue, fever, • In cases when there are signs and symptoms related to conditions/diseases related to blood cells such as weakness, fever, inflammation, or bleeding. • To monitor the treatment of condition/diseases related to blood cells such as bleeding disorders and treatment procedures such as chemotherapy   The Malarial Parasite test is done: • In case of signs or symptoms like fever with chills, nausea, vomiting, headache, diarrhea, and profuse sweating • As a part of fever panel check-up