2012). Researchers have also worked in developing a fast and sensitive immunosensor assay for measuring an important acute phase protein haptoglobin (Hp) secreted during udder inflammation and particularly useful for detecting cases of subclinical mastitis. Results based upon 20 milk samples without showing clinical signs and with SCC of more than 5 × 105 cells ml−1 were promising and recommended the use of this biosensor in dairies under field conditions for quick diagnosis (Tan et al. 2012). Here, HP is linked to mastitis.