Galactomannan

Guar gum has been used to add viscosity to artificial tears, but is not as stable as carboxymethylcellulose.

Tara gum is seeing growing acceptability as a food ingredient but is still used to a much lesser extent than guar or LBG.

Guar has the highest usage in foods, largely due to its low and stable price.

This is performed with monoclonal antibodies in a double-sandwich ELISA; this assay from Bio-Rad Laboratories was approved by the FDA in 2003 and is of moderate accuracy.

False positive Aspergillus Galactomannan test have been found in patients on intravenous treatment with some antibiotics or fluids containing gluconate or citric acid such as some transfusion platelets, parenteral nutrition or PlasmaLyte.