What causes haemagglutination?
Hemagglutination is a reaction that causes clumping of red blood cells in presence of some enveloped viruses, such as the influenza virus. A glycoprotein on the viral surface, namely hemagglutinin, interacts with red blood cells, leading to the clumping of red blood cells and the formation of a lattice.
What are the causes of vertigo or dizziness?
Vertigo is commonly caused by a problem with the way balance works in the inner ear, although it can also be caused by problems in certain parts of the brain. Causes of vertigo may include: benign paroxysmal positional vertigo (BPPV) – where certain head movements trigger vertigo. migraines – severe headaches.
How can I stop feeling dizzy?
How you can treat dizziness yourself
- lie down until dizziness passes, then get up slowly.
- move slowly and carefully.
- get plenty of rest.
- drink plenty of fluids, especially water.
- avoid coffee, cigarettes, alcohol and drugs.
What is passive hemagglutination?
n. Passive agglutination in which red blood cells are used to adsorb soluble antigen onto their surfaces; the red blood cells then agglutinate in the presence of antiserum specific for the adsorbed antigen. indirect hemagglutination test.
How is hemagglutination test done?
The haemagglutination test is used to quantify the amount of Newcastle disease virus in a suspension. This is done by carrying out two-fold serial dilutions of the viral suspension in a microwell plate and then testing to determine an end point.
Why do I feel lightheaded and Dizzy all of a sudden?
Circulation problems that cause dizziness. You may feel dizzy, faint or off balance if your heart isn’t pumping enough blood to your brain. Causes include: Drop in blood pressure. A dramatic drop in your systolic blood pressure — the higher number in your blood pressure reading — may result in brief lightheadedness or a feeling of faintness.
What causes dizziness when your blood pressure drops?
Causes include: 1 Drop in blood pressure. A dramatic drop in your systolic blood pressure — the higher number in your blood pressure… 2 Poor blood circulation. Conditions such as cardiomyopathy, heart attack, heart arrhythmia and transient ischemic attack… More
What causes dizziness in the middle of the brain?
Many cases of dizziness are caused by problems that affect the balance mechanism in your inner ear. Examples include: Dizziness can be caused if your brain doesn’t receive enough blood.
What causes dizziness when you have low blood sugar?
Low blood sugar (hypoglycemia). This condition generally occurs in people with diabetes who use insulin. Dizziness (lightheadedness) may be accompanied by sweating and anxiety.