Meningococcal antibody assay

The pathogenic meningococcus is mainly A, B, C and Y groups. The main cause of epidemic in China is group A, and group B and group C are rare. Basic Information Specialist classification: Infectious disease examination and classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: Normal: Meningococcal antibody was negative. Positive: Abnormal: Positive: A specific diagnosis of meningitis. In vivo antibodies can be detected in the middle and late stages after onset. Tips: After 8 pm on the day before the medical examination, you should start fasting for 12 hours, so as not to affect the test results. Normal value The meningococcal antibody was negative. Clinical significance A specific diagnosis of positive meningitis. In vivo antibodies can be detected in the middle and late stages after onset. Precautions First, the precautions before blood draw: 1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. 2. After 8 pm on the day before the medical examination, you should start fasting for 12 hours to avoid affecting the test results. 3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection. Second, after blood draw should pay attention to: 1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma. 2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended. 3, after the blood draw symptoms of fainting such as: dizziness, vertigo, fatigue, etc. should immediately lie down, drink a small amount of syrup, and then undergo a physical examination after the symptoms are relieved. 4. If there is localized congestion, use a warm towel after 24 hours to promote absorption. 3. Please inform the doctor about the recent medication and special physiological changes before the test. Inspection process Skin sputum and cerebrospinal fluid smear examination. When the skin is examined, use the tip of the needle to puncture the skin on the spot. Do not let the bleeding as much as possible. Squeeze a small amount of tissue fluid and apply it on the glass slide. After staining, the positive rate can be as high as 70%. The cerebrospinal fluid precipitation smear is also higher than the cerebrospinal fluid culture, which is 60% to 70%, so it is an indispensable examination step for the diagnosis of this disease. Cerebrospinal fluid should not be left for too long, otherwise the pathogens are easily autolyzed. Sometimes Gram staining is too long, or the bacteria die, and Gram-positive cocci can be mistaken for Gram-negative cocci. In addition to skin imperfections and cerebrospinal fluid, Gram-negative cocci are sometimes found in leukocytes of buffy coat or peripheral blood smears. Not suitable for the crowd There are no special taboos. Adverse reactions and risks There are no related complications and hazards.