Medical expert of the article
New publications
Leukocyte blood formula
Last reviewed: 23.04.2024
All iLive content is medically reviewed or fact checked to ensure as much factual accuracy as possible.
We have strict sourcing guidelines and only link to reputable media sites, academic research institutions and, whenever possible, medically peer reviewed studies. Note that the numbers in parentheses ([1], [2], etc.) are clickable links to these studies.
If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please select it and press Ctrl + Enter.
Leukocyte formula - the percentage ratio of different types of leukocytes in the blood smear. When evaluating the leukocyte formula, it may be necessary to take into account the absolute content of certain types of leukocytes.
Changes in the leukocyte formula accompany many diseases and are often nonspecific. Nevertheless, the diagnostic value of this study is great, as it gives an idea of the severity of the patient's condition, the effectiveness of the treatment. With hemoblastoses, the study of the leukocyte formula often allows you to establish a clinical diagnosis.
Leukocyte formula - the percentage ratio of different types of leukocytes in the blood smear.
Reference factors (norm) are reflected in the table, from which one can see
Cells |
Content,% | ||||
Adults |
At birth |
1 day |
4 days |
2 weeks | |
Myelocytes |
- |
0.5 |
0.5 |
- |
- |
Metamyelocytes |
- |
4 |
4 |
2.5 |
1.5 |
Stab neutrophils |
1-5 |
27th |
26th |
7th |
3 |
Segmented neutrophils |
40-70 |
34 |
34 |
39 |
25 |
Lymphocytes |
20-45 |
22.5 |
24 |
36.5 |
55 |
Monocytes |
3-8 |
8 |
9.5 |
Eleven |
11.5 |
Eosinophils |
1-5 |
3 |
2 |
3.5 |
3 |
Basophils |
0-1 |
0.75 |
0.25 |
- |
0.5 |
Plasmocytes |
- |
0.25 |
0.25 |
0.5 |
0.5 |
What do need to examine?