Transferrin saturation is a calculated value resulting from a medical laboratory test to measure the amount of iron bound to transferrin in the blood. The liver produces transferrin, which is a protein that serves to bind iron molecules and carry them through the bloodstream to the bone marrow.
In addition to the cough, your child may also have a hoarse voice and have laboured breathing. Croup is most common in autumn and winter, and when a child is between 6 months and 3 years old. However, older children up to 15 years old sometimes get croup too. Croup is a common respiratory condition in children caused by either a viral infection or allergy.
Quick Answers. 1  Croup is an illness of the respiratory system. 2  Croup can be caused by either a viral or bacterial infection. 3  Croup can cause a barking cough and troubled breathing.  Croup is contagious. It can be spread through sneezing, coughing, and direct 1  contact. Inhaling moist air can help your child breathe easier.