A brain natriuretic peptide (BNP) test measures the amount of the BNP hormone in your blood. BNP is made by your heart and shows how well your heart is working.Normally, only a low amount of BNP is found in your blood.uide. A brain natriuretic peptide (BNP) test measures the amount of the BNP hormone in your blood. BNP is made by your heart and shows how well your heart is working. Normally, only a low amount of BNP is found in your blood.
Bacterial cultures can be preserved for long by suspending in glycerol broth and storing at -20 to -70 degree Celsius. The protocol as below: To 0.85 ml of bacterial culture, add 0.15 ml of sterile glycerol (sterilized by autoclave, final glycerol concentration : 15%, v/v).
A bacterial sputum culture is used to detect and diagnose bacterial lower respiratory tract infections such as bacterial pneumonia or bronchitis. It is typically performed with a Gram stain to identify the bacteria causing a person's infection. bacterial sputum culture is used to detect and diagnose bacterial lower respiratory tract infections such as bacterial pneumonia or bronchitis. It is typically performed with a Gram stain to identify the bacteria causing a person's infection.