What is the main white blood cell that engulfs bacteria?

White blood cells are very important for good health. As the body metabolizes, some necrotic white blood cells are prone to appear. Bacteria are more common in daily life. The body's bacteria will devour a certain amount of necrotic white blood cells. However, if the body's resistance is low, it will easily cause certain damage to the body. Detailed examination and treatment can be done.

What is the main white blood cell that engulfs bacteria?

The two are in different categories. It can be said that all phagocytes in the blood belong to white blood cells. Macrophages are a type of defense cell that protects organisms by engulfing harmful substances such as bacteria, necrotic cells and apoptotic cells. Many types of white blood cells are professional phagocytes.

White blood cells are part of the immune system and help the body fight infection and foreign substances. White blood cells can be produced from hematopoietic stem cells in the bone marrow. White blood cells have nuclei and can undergo deformation and movement. Under normal circumstances, the concentration of white blood cells in a healthy adult is 4×109 to 1.1×1010 per liter of blood. White blood cells are immune cells. When the body develops cancer or other diseases, the total number of white blood cells or the percentage of cell classification in the blood may change.

In addition to the blood, white blood cells are also found in the lymphatic system, spleen, tonsils, and other tissues of the body.

Leukemia is a malignant disease caused by the uncontrolled abnormal proliferation of white blood cells.

Leukocyte phagocytosis test

The leukocyte phagocytic function test is an in vitro test method to test the level of human cellular immune function. The principle is to mix the blood being examined with a certain concentration of streptococcal or staphylococcal culture fluid, culture them together, and then observe the phagocytic ability of white blood cells under a microscope. The specific steps are as follows: add 0.05 ml of 5% sodium citrate and 0.1 ml of the blood to be tested into a small test tube, and shake well; immediately draw 0.05 ml of bacterial culture solution containing a certain number of bacteria into the above test tube, shake well again, and culture in a 37°C incubator for 30 minutes. Then take out the test tube, shake it evenly, make 2 to 3 smears, and after it dries, fix it with formaldehyde and stain it with HE. The number of cells phagocytosing bacteria among 100 neutrophils was counted under a microscope, and the phagocytic function level of leukocytes was determined based on the percentage.

The leukocyte phagocytic function test is an in vitro test of cellular immunity. A certain concentration of streptococcus or staphylococcus culture fluid is cultured with animal blood to observe the ability of white blood cells to phagocytize bacteria. Add 0.05 ml of 5% sodium citrate to a small test tube, then add 0.1 ml of animal blood, shake well, immediately draw 0.05 ml of bacterial culture fluid containing a certain number of bacteria, add it to the blood sample tube, shake well, and culture in a 37°C incubator for 30 minutes. Then, take out the test tube, shake it well, make 2 to 3 smears, fix it with methanol after it dries, and stain it for microscopic examination. Count the number of cells that phagocytize bacteria among 100 neutrophils to determine the phagocytic function of white blood cells. This experiment can be used to investigate the impact of environmental pollution on health. For example, air pollution can reduce the phagocytic function of white blood cells in the population.

Introduction to White Blood Cells

White blood cells were formerly known as leukocytes. A type of cell in the blood. White blood cells are also often called immune cells. Colorless cells found in human and animal blood and tissues. It has a nucleus and can undergo deformation movement. Leukocytes generally have active mobility and can migrate from intravascular to extravascular, or from extravascular tissue to intravascular. Therefore, in addition to existing in blood and lymph, white blood cells are also widely present in tissues other than blood vessels and lymphatic vessels.