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Drug is a kind of substance that endangers human health and social stability. It can seriously damage human organs, impair human brain and body functions, and lead to serious physical and psychological problems.

Colorectal cancer is one of the most common malignant tumors of the digestive system worldwide, and early diagnosis and treatment are essential to improve the survival rate of patients.

Based on the characteristics of drug detection in different biological materials such as blood, urine, hair, saliva and nails, different methods can be applied at different stages in drug prevention and control and fight in the future, and different detection methods can be selected for different groups of people.

Drug users are more likely to be infected with AIDS than ordinary people, and the factors related to drug use itself are as follows:

In 2021, one in 17 people aged 15-64 globally will have used a drug in the previous 12 months. The increase in the estimated number of users from 240 million in 2011 to 296 million in 2021 (5.8 per cent of the global population aged 15-64) shows that the drug problem can be global and its scale is growing.

World Blood Donor Day is held on 14 June each year to raise awareness and awareness of blood donation and encourage more people to donate their love and help others in their lives. Donating blood not only saves lives, it also provides an important resource for medical research and helps scientists better understand human health and disease.

Calprotenin is a calcium-zinc binding protein complex. It is found almost throughout the body, but is mainly found in white blood cells (also known as neutrophils), and is also expressed in monocytes and macrophages. In the case of inflammation of the gastrointestinal tract, white blood cells are drawn into the intestine and release the chemical mediators of inflammation and calprotenin in the intestine, thus increasing the concentration of calprotenin in the stool.

Calprotenin is a calcium-binding protein of the S100 family, which is mainly derived from neutrophils, but is less present in monocytes and macrophages, accounting for about 60% of the cytoplasmic protein of neutrophils.

Fecal calprotectin is more sensitive and specific than systemic inflammatory markers, and is consistent with the degree of histological lesions. With these properties, it can be used as a biomarker indicating the degree of intestinal inflammation for the management and monitoring of inflammatory bowel disease (IBD).

Calprotenin is a calcium-binding protein derived from neutrophils and macrophages, which has been widely used in clinical diagnosis. Calcareous protein detection reagent is a reagent used to measure the concentration of calcareous protein in body fluids, and its application is of great significance in clinical diagnosis.