Biological sample collection cards are tools used for collecting, preserving, and transporting biological samples, and they have a wide range of application fields, mainly including the following aspects:

Disease Screening: In neonatal disease screening, heel blood or oral mucosal cells of newborns can be collected through collection cards to detect whether they suffer from genetic metabolic diseases such as congenital hypothyroidism and phenylketonuria. During large-scale infectious disease screenings, such as during the COVID-19 pandemic, saliva collection cards were widely used for the screening of the novel coronavirus, which was convenient and quick and enabled rapid testing of a large number of people.
Disease Monitoring: For patients with chronic diseases, such as diabetes and hypertension, medical staff can use biological sample collection cards to regularly collect the patients’ blood or urine samples to detect indicators such as blood glucose, blood lipids, and renal function, so as to adjust the treatment plan in a timely manner and monitor the development and treatment effect of the diseases.
Cancer Diagnosis: By using collection cards to collect samples such as the patient’s blood, sputum, and tissues, detect tumor markers, gene mutations, etc. in them to assist in the early diagnosis, staging, and prognosis evaluation of tumors. For example, detect tumor markers such as carcinoembryonic antigen (CEA) and alpha-fetoprotein (AFP) in the blood, or detect lung cancer-related gene mutations through sputum samples.

Evidence Collection at Crime Scenes: At crime scenes, biological sample collection cards can be used to collect biological samples such as blood, hair, dandruff, and saliva. These samples are preserved and transported through the collection cards and then subjected to DNA analysis in the laboratory, which can help the police identify the suspect and provide key evidence for solving the case.
Paternity Testing: In paternity testing, oral mucosal collection cards are usually used to collect oral mucosal cells of parents and children, and the DNA in them is extracted for comparative analysis to determine the paternity relationship.

Genetic Research: Researchers use biological sample collection cards to collect blood, tissues, and other samples of various organisms for research such as gene sequencing and gene expression analysis to explore the relationship between genes and diseases and the functions of genes. For example, in the Human Genome Project, a large number of human biological samples need to be collected for genetic research.
Drug Development: During the drug development process, it is necessary to collect biological samples of patients or experimental animals to evaluate the efficacy and safety of drugs. Biological sample collection cards can be used to collect samples such as blood and urine to detect the metabolites of drugs in the body, drug concentrations, and other indicators, providing data support for drug development.

Animal Disease Monitoring: For farmed animals, such as pigs, cows, and sheep, biological sample collection cards can be used to collect samples such as blood, feces, and tissues to detect whether they are infected with animal diseases such as foot-and-mouth disease, avian influenza, and classical swine fever, discover the epidemic situation in a timely manner, and take prevention and control measures to prevent the spread and expansion of the diseases.
Wildlife Conservation: In wildlife conservation work, by collecting samples such as blood, hair, and feces of wild animals through biological sample collection cards, it is possible to monitor the health status of wild animals, understand their population genetic structure, disease prevalence, etc., and provide a scientific basis for the protection and management of wild animals.

Microbial Detection: Biological sample collection cards can be used to collect microbial samples on the surface or inside of food to detect whether there are pathogenic microorganisms such as Escherichia coli, Salmonella, and Staphylococcus aureus in the food, judge the hygiene status of the food, and ensure food safety.
Toxin Detection: For foods that may contain toxins, such as moldy grains and contaminated aquatic products, use biological sample collection cards to collect samples and detect the content of toxins such as aflatoxin and tetrodotoxin in them to ensure that the food meets safety standards.