This product line offers the diversity of two testing and treatment options with Fel d 1 and albumin.

Fel d 1 is universally present in U.S. homes (even homes without pets)1, meaning all of your patients have some home exposure to cat allergens. Because everyone is at risk for possible allergic sensitization, it’s important you have the most exacting options for diagnosis and treatment.

Our manufacturing process allows us to target specific levels of Fel d 1 for greater lot to lot consistency.

While our standardized cat extracts are produced using our exclusive Acetone Precipitated (AP) process, potency is standardized by the FDA.

Tighter release limits than the FDA means more consistent lot to lot product. For instance, our cat hair release limit is 12.5-19.9 units/mL and our cat pelt release limit is 13.3-19.9 Fel d 1 Units/mL vs. the FDA limit of 10-19.9 units/mL.2

Approximately 22% of patients with a cat allergy have specific IgE antibodies to cat albumin.3 Cat pelt extracts have a greater amount of albumin than cat hair extracts.3 Therefore, testing for both cat hair and cat pelt is beneficial.

Like all of our antigens, our standardized cat extracts don’t contain phenol which can denature the proteins in allergenic extracts.

4815 AP Cat Hair – Scratch (Standardized) 5 mL
10,000 BAU/mL
AP Cat Hair – Bulk (Standardized) 10 mL, 50 mL
Glycerinated 10,000 BAU/mL
4810 AP Cat Pelt – Scratch (Standardized) 5 mL
10,000 BAU/mL
AP Cat Pelt – Bulk (Standardized) 50 mL
Glycerinated 10,000 BAU/mL


1 S.J. Arbes, R.D. Cohn, M. Yin, M.L. Mullenbert, W. Friedman, and D.C. Zeldin. Dog Allergen (Can f1) and Cat Allergen (Fel d1) in US Homes: Results from the National Survey of Lead Allergens in Housing. The Journal of Allergy and Clinical Immunology, 114(1), 111-117 (2004).

2 Internal data on file.

3 Cox, L., Nelson, H., Lockey, R., Calabria, C., Chacko, T., Finegold, I., Nelson, M., Weber, R., Bernstein, D. I., Blessing-Moore, J., Khan, D. A., Lang, D. M., Nicklas, R. A., Oppenheimer, J., Portnoy, J. M., Randolph, C., Schuller, D. E., Spector, S. L., Tilles, S., & Wallace, D. (2011). Allergen immunotherapy: a practice parameter third update. The Journal of allergy and clinical immunology, 127(1 Suppl), S1–S55.

4 H.S. Nelson. Preparing and mixing allergen vaccines for subcutaneous immunotherapy. R.F. Lockey, S.C. Bukantz, & J. Bousquet (Eds.), Allergens and allergen immunotherapy, 4th ed., p. 315, 2008.