Microfilariae (Mf)

Blood filariasis is a parasitic disease in which microfilariae can be detected in peripheral blood and lymphatic extracts of patients, and microfilariae is the pathogen of filariasis. Microfilariae can also be found in various body fluids and urine, so microfilaria can be found in hydrocele, lymph, ascites, chyluria and urine. Basic Information Specialist classification: Infectious disease inspection and classification: pathogenic microorganism inspection Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: Negative is normal, recorded as (-) or not detected. Positive: Prompt filariasis. Tips: Since the microfilariae have a nighttime periodicity, it is best to take blood samples from 10:00 to 2:00 in the evening when the patient is asleep. Normal value Negative, recorded as (-); or not detected. Clinical significance Filariasis can be diagnosed by finding microfilaria. Positive results may be diseases: filariasis, lymphatic filariasis, chest filariasis, skin filariasis precautions 1. Since the microfilariae have a nighttime periodicity, it is preferable to take a blood specimen at a time when the patient is asleep between 10:00 and 2 am. 2. If the examination is during the day, the patient should take 2-6 mg/kg body weight orally and take blood for 30 to 60 minutes after taking the test. This method can be used for inconvenient blood collection at night, but it is easy to miss the diagnosis of low-infected people. 3. Microfilaria can also be found in various body fluids and urine, so microfilaria can be found in hydrocele, lymph, ascites, chyluria and urine. Direct smear of the above body fluids may be taken, staining microscopic examination; or by centrifugation concentration method, membrane filtration concentration method and the like. The liquid containing chyle can be added with ether to fully dissolve the fat, remove the fat layer above, dilute with water 10 times, centrifuge at 1500-2000 rpm for 3 to 5 minutes, and take a sediment microscopy. Inspection process In a test tube concentration method, 1 to 2 ml of blood was collected from the vein, and immediately placed in a test tube containing 109 mmol/L sodium citrate 0.4 ml, mixed with anticoagulation, added with 8--10 ml of distilled water, mixed by inversion, and all red blood cells were dissolved, and then The supernatant was decanted by centrifugation at 1500 r/min for 3 - 5 min, and the sediment microscopy was taken to find the microfilaria. If you need to identify the species, you can dry and fix it. Not suitable for the crowd Those who do not have an indication for examination should not do this check. Adverse reactions and risks Generally no complications and harm.